Best .300 Blackout Lower Receivers in 2021

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Winner
Best Value
Lowers
PSA AR-15 COMPLETE LOWER MAGPUL MOE EDITION + GEISSELE SSA-E TRIGGER
PSA AR-15 MOE LOWER RECEIVER WITH TWO-STAGE NICKEL BORON TRIGGER
PSA AR15 COMPLETE CLASSIC SBA4 LOWER
PSA AR-15 COMPLETE MOE EPT LOWER
PSA AR-15 LOWER SAFE/FIRE
Our Test Result
Test Result 9.8/10 Excellent May 2021
Test Result 9.6/10 Very Good May 2021
Test Result 9.4/10 Very good May 2021
Test Result 9.3/10 Very Good May 2021
Test Result 9.0/10 Good May 2021
Value for Money
Performance
Pros
  • Best accuracy
  • Perfect for concealed carry
  • The S&W fits in all the common holster
  • Very good quality, hard to damage
  • Awesome firing power
  • Tight shooting groups
  • Works with different .380 ammunition
  • Reliable shooting power
  • Great to carry concealed
  • Perfect trigger pull, not too heavy or light
  • Not much recoil out of the box
  • Very lightweight
  • Easy to control, great for beginners
  • Fits in most holsters
  • Great shooting power
  • Concealable even though full sized
Cons
  • Basically none
  • none
  • none
  • none
  • Trigger pull could be a bit easier
Recommended by us
Winner
Lowers
PSA AR-15 COMPLETE LOWER MAGPUL MOE EDITION + GEISSELE SSA-E TRIGGER
Our Test Result
Test Result 9.8/10 Excellent May 2021
Value for Money
Performance
Pros
  • Best accuracy
  • Perfect for concealed carry
  • The S&W fits in all the common holster
  • Very good quality, hard to damage
Cons
  • Basically none
Recommended by us
Check Price
Best Value
Lowers
PSA AR-15 MOE LOWER RECEIVER WITH TWO-STAGE NICKEL BORON TRIGGER
Our Test Result
Test Result 9.6/10 Very Good May 2021
Value for Money
Performance
Pros
  • Awesome firing power
  • Tight shooting groups
  • Works with different .380 ammunition
Cons
  • none
Recommended by us
Check Price
Lowers
PSA AR15 COMPLETE CLASSIC SBA4 LOWER
Our Test Result
Test Result 9.4/10 Very good May 2021
Value for Money
Performance
Pros
  • Reliable shooting power
  • Great to carry concealed
  • Perfect trigger pull, not too heavy or light
Cons
  • none
Recommended by us
Check Price
Lowers
PSA AR-15 COMPLETE MOE EPT LOWER
Our Test Result
Test Result 9.3/10 Very Good May 2021
Value for Money
Performance
Pros
  • Not much recoil out of the box
  • Very lightweight
  • Easy to control, great for beginners
Cons
  • none
Recommended by us
Check Price
Lowers
PSA AR-15 LOWER SAFE/FIRE
Our Test Result
Test Result 9.0/10 Good May 2021
Value for Money
Performance
Pros
  • Fits in most holsters
  • Great shooting power
  • Concealable even though full sized
Cons
  • Trigger pull could be a bit easier
Recommended by us
Check Price

If you’re searching for the best .300 Blackout lower receiver, you could be in for a challenge. If you know just what you’re searching for, though, you don’t have to think about wasting time or resources.

To assist you in your quest, we’ve selected five of the best .300 Blackout lower receivers currently available. These are high-quality receivers with a specific function in mind. However, they are not always made equal. As a consequence, it’s up to you to choose which one better suits your rifle and personal interests.

Before we get started with our list, let’s talk about the .300 Blackout and how well it works for AR-15s. We’ll also glance at some of the factors to remember while looking for a lower receiver on your own.

Compatibility of the 300 Blackout with the AR-15

AR-15 owners and enthusiasts were fast to welcome the .300 Blackout when it first appeared on the scene years ago. One of the explanations is that the .300 Blackout, especially its rifles, were able to handle AR-15 magazines without difficulties. Let’s have a peek at it as well. It will keep track of almost every regular AR-15 component or accessory you can think of.

Best .300 Blackout Lower Receivers in 2020

However, are you able to shoot . 300 Blackout cartridges in Ar-15 magazines, which were designed for different kind of rounds? The response is yes if you have a magazine that is designed to hold 5.56 NATO bullets. If you have a magazine that normally holds .223 bullets, though, it is unlikely to be compatible.

What portions of the system must be altered to fit Blackout cartridges? 5.56 rifles, once again, could not be applicable to all future modifications. However, a rifle chambered in .223 caliber could need to be entirely converted to accommodate those rounds.

What Makes Up a Lower Receiver’s Components?

To grasp the inner workings of a lower receiver, you must first understand some of its elements. In a nutshell, your .300 Blackout rifle’s fire control group is located in the lower receiver. The same is true for every other AR-15 weapon with this element.

The trigger, disconnector, fire selector, magazine capture, and hammer are all part of the lower receiver. The trigger assembly and the magazine are the two most critical components located in the lower receiver, in plain English.

Two pins are used to attach it to the upper receiver. Because of the split layout of two receivers, the upper part would have more adjustment choices.

What Characterizes a Top-Notch .300 Blackout Lower Receiver?

Before you pick a lower receiver for your .300 Blackout rifle, you can consider what makes one better to the low-cost, low-quality alternatives.

We suggest that you take your time while picking one so that you can choose the right one that is both good in quality and successful in achieving its purpose. If you’re not sure what to search for, here’s a selection of suggestions focused on feedback from previous buyers:

Is it a Good Fit for Your Barrel?

The most critical thing to consider is whether or not this would match my barrel properly. Keep in mind that this isn’t the case with all barrels of the 300 Blackouts, since some vary in length. Some are just 10 inches long, and others are 9 inches or taller. In any case, you’ll need to locate a lower receiver that can hold a barrel of the required length.

Installation

Of note, not every owner of a .300 Blackout is a professional gunsmith. As a result, it’s critical to find a product that’ll be simple to set up. It might be required to use equipment, but it should be straightforward enough that you won’t need to employ a licensed gunsmith. In the quest for a lower recipient, the main term to aim for is “drop in.” This translates to “simple to install” in plain English.

Is it a Suitable Match for Your Upper?

If you can’t locate a compatible upper, a decent lower won’t last in position. If you find a lower receiver from a specific manufacturer, it is strongly recommended that you also find an upper receiver from that same brand.

Since not all uppers from the same manufacturer match exactly, you’ll need to do some testing to find out which one would function with the lower receiver you choose.

Review: Best .300 Blackout Lower Receivers

The five best .300 Blackout lower receivers on the market right now are mentioned below. The main thing to remember is that although they all have one task, they are all unique in their way.

Reading through each of these articles extensively is helpful before reaching a good personal choice. You might find one to be a reasonable replacement for your existing lower receiver. Alternatively, if you’re designing a weapon, now is the time to find a lower receiver that will look decent and perform well until the rifle is complete. So, without further ado, let’s get started:

Best .300 Blackout Lower Receiver : PSA AR-15 COMPLETE LOWER MAGPUL MOE EDITION + GEISSELE SSA-E TRIGGER

Best .300 Blackout Lower : PSA AR-15 COMPLETE LOWER MAGPUL MOE EDITION + GEISSELE SSA-E TRIGGER

Pros

  • Easy Installation
  • Best quality, military grade
  • Eliminates quite a bit of Recoil

Cons

  • More expensive

The PSA AR-15 COMPLETE LOWER MAGPUL MOE EDITION Lower is the first lower receiver we’ll look at. To start with, you’ll find that this is a really sturdy and long-lasting lower. This is attributed to the fact that it is constructed of high-quality 7075 aluminum.

This form of aluminum can be used in most lower receivers and other pieces. Manufacturers choose this brand of aluminum since it is one of the hardest products available. This lower receiver is not only built to be a lower receiver, but it also comes with a handy little addition.

The inclusion is a buttstock made of synthetic materials that is intended to help the stock mitigate recoil and withstand shock.

Since 300 Blackout rifles have a lot of power, expect the buttstock to help reduce recoil as much as possible.

A GEISSELE SSA-E TRIGGER trigger is included with this package. This trigger is a mil-spec trigger with a nickel finish that gives you a quick, crisp pull every time. If you want to fire a shot fast, you’ll need a trigger with a light pull weight that helps you to stop adding too much energy.

The PSA AR-15 COMPLETE LOWER MAGPUL MOE EDITION Lower could be your best bet if you’re searching for a reliable product for your .300 Blackout.

Verdict

The PSA lower receiver has proved to be worthy as the first ranked lower in our test.  That is something we have no doubts over. Although certain consumers might be concerned about the trigger pull, it will pull better than mil-spec trigger in the market.

The buttstock is an excellent addition to this item which can save you money over buying one separately. The PSA AR-15 COMPLETE LOWER MAGPUL MOE EDITION might be the one for you if you’re hunting for the best of the best when it comes to lower receivers.

Best Price .300 Blackout Lower Receiver: PSA AR-15 MOE LOWER RECEIVER WITH TWO-STAGE NICKEL BORON TRIGGER

Best Price .300 Blackout Lower Receiver: PSA AR-15 MOE LOWER RECEIVER WITH TWO-STAGE NICKEL BORON TRIGGER

Pros

  • Best bang for the buck
  • Fits with many PSA Uppers
  • Good durability

Cons

  • Trigger pull not the most popular

The PSA AR-15 MOE LOWER RECEIVER will be our next stop. This stock is designed to look like a standard rifle stock, as opposed to our previous product. This could be worth looking into if you want a design like that for your .300 Blackout weapon.

This is made from an aluminum forging that is robust as nails and worthy of doing the duties of a strong weapon like an AR rifle capable of shooting 300 Blackout rounds off.

This would suit not only .300 Blackout rifles, but also AR rifles of various calibers. It doesn’t matter whether you have a 5.56 or a.223, this product is adaptable and can suit nearly every AR rifle. If you still possess other AR rifles, it may be worthwhile to invest in another if you have the money.

The lower receiver provides a pistol grip and buttstock, as well as the standard trigger assembly, to allow you more control over your .300 Blackout rifle. Know that the rifle can be dangerous in terms of precision if you have decent control and the capacity to withstand a lot of recoil. This may be able to help you stabilize the weapon and reduce as much recoil as possible if you want to keep precision to a high degree.

Verdict

This PSA lower receiver has the look and feel of a standard rifle. If that’s something you’re excited about, you’ll have no trouble selecting this one over the others. As previously said, this is compatible with almost every other AR rifle on the market.

As a result, the rifles’ versatility and potential to operate for you is very remarkable. If you’re searching for a replacement lower receiver for any of your AR rifles (if you have any), this PSA tool is the way to go.

3rd Best .300 Blackout Lower Receiver: PSA AR15 COMPLETE CLASSIC SBA4 LOWER

3rd Best .300 Blackout Lower: PSA AR15 COMPLETE CLASSIC SBA4 LOWER

Pros

  • Well machined Lower receiver
  • Military grade quality
  • Functions well after 300+ rounds rounds fired off

Cons

  • Heavier trig pull

If you have a bigger budget for your .300 Blackout weapon, you’ll be able to find a suitable lower receiver. What better choice than the PSA AR15 COMPLETE CLASSIC SBA4 LOWER to find?

This component is constructed of high-quality metal, and the receiver extension is also made of the same material. Of course, it’ll hold up to the pressure a .300 Blackout rifle will carry out.

The trigger has been upgraded and refined to give you a mil-spec type pull. Which means the trigger pull may be somewhat heavier than others, but you’ll still get a no-creep trigger pull every time.

The buttstock is built to withstand a lot of shock and allow you the maximum leverage over your rifle. If you’re searching for a product that’s both effective and economical, the PSA AR15 COMPLETE CLASSIC SBA4 LOWER is worth considering.

This lower is compatible with most PSA brand uppers, so if you need an upper as well, grab this lower and an upper that will match each other and kill two birds with one stone.

Verdict

This would, without a doubt, be the best choice for you if you’re searching for an outstanding lower receiver that suits your budget. The collapsible stock is ideal for anyone who do not want to work with a “one size fits all” stock.

If you want your .300 Blackout rifle’s reach to be dead-on with the right modifications, this stock can provide it. Like one would imagine, this is one of those “you get what you pay for” accessories.

We only find the highest-quality products at a price that suits certain budgets, because quality and value can not be compromised solely due to a higher price tag.

4th Rank of the Best .300 Blackout Lower Receivers: PSA AR-15 COMPLETE MOE EPT LOWER

4th Rank of the Best .300 Blackout Lower Receivers: PSA AR-15 COMPLETE MOE EPT LOWER

Pros

  • Great fit, secured properly
  • Awesome trigger pull
  • Fits with nearly all PSA Uppers

Cons

  • Some Have Had Issues About the Safety Selector Being a Little hard to switch

Following that, we’ll glance at the PSA AR-15 COMPLETE MOE EPT LOWER. Aside from the material it’s made of, it has an M4 stock that’s built to provide optimum protection and withstand as much recoil as possible. Since the material is synthetic, it would be able to absorb a significant amount of shock.

Furthermore, it is capable of withstanding even the most severe weather conditions. You won’t have to think about the stock being hurt whether it’s raining heavily on the range or in the region.

The good news is that this will match almost every caliber within the AR category, like .300 Blackout rifles. Even better, this puppy arrives completely equipped and ready to use as soon as you bring it together. This is the lower you’ll like on your weapon if you want a classic lower that will work properly straight out of the case.

Verdict

This complete PSA AR-15 COMPLETE MOE EPT LOWER could be your best choice if you’re searching for a fine, completely installed product for your .300 Blackout. All is placed together and ready to use when it is mounted.

Since the installation is fast, you may be able to try it out the same day. This is also a nice product to get if you want anything that’s as similar to a combat look as possible.

5th Rank of the Best .300 Blackout Lower Receivers: PSA AR-15 LOWER SAFE/FIRE

5th Rank of the Best .300 Blackout Lower Receivers: PSA AR-15 LOWER SAFE/FIRE

Pros

  • Great for Starters
  • Functions well after many rounds shot
  • Good build quality

Cons

  • One Buyer remarked that This Lower is a bit Being Loose in Fit

We’ll look at the AR-15 Lower Safe/Fire as our final lower receiver on the list. This is built from engineering established in an unexpected industry. We’re speaking about the aerospace industry explicitly.

If you plan to go for this product and are pleased with it, you’ll have to thank NASA for creating the technologies that allowed it to be placed together. Apart from that, it has a protection that indicates when it is secure and when it is live and ready to shoot, which is why it’s called Safe/Fire.

Aside from that, it’s made of high-quality aluminum and is built to match a .300 Blackout rifle, as well as other AR-style weapons. The anodized black coating contributes to the toughness of the lower receiver, rendering it a rugged as nails item that will last a long time.

Verdict

The Safe/Fire functionality is a helpful addition to this one of the Best .300 Blackout Lower Receivers. If you’re searching for something to go with something like an ambidextrous trigger, this might be the one.

Aside from that, this is a tough product that can last you a long time if you take care of it properly.

Clean your 300 Blackout rifle at least once every 500 shells. No matter what you use your rifle for, take care of it and it will take care of you.

Final thoughts

It doesn’t have to be challenging to choose the best .300 Blackout lower receiver. It’s vital to choose one that can last you a long time and can be worn with your ideal upper.

Since these are all PSA items, it’s strongly recommended that you match the lower of your preference with a PSA upper. You and your .300 Blackout rifle will be good to go after you’ve finished putting it together.

How to build an AR15 rifle

Best .300 Blackout Lower Receivers in 2020

When do you get invited “to a rifle”? Far too rarely, we think … Markus Königsberger is an accomplished IPSC shooter, gun enthusiast and Schmeisser representative in Austria. That he stands by the brand: quite clear. That the Schmeisser brand supports him: great. Markus was invited to Krefeld to the Schmeisser headquarters to build his own sporting equipment. Together with Schmeisser technicians, an unmistakable original was created in one day of manual work.

But not only that: Markus was also trained as a certified Schmeisser Armorer and is thus the first in Austria. He will also be responsible for training other Schmeisser Armorer here. Here the boss himself welcomes: Thomas Hoff is happy about Markus’ visit in Krefeld. He is wearing the right T-shirt right away, with the Schmeisser logo in the background. Well, that’s a given! Markus and Thomas are not only connected by business, but also by a true friendship. This beauty is the reason for the visit. A real Schmeisser, individually configured and in a color that was only introduced at IWA 2017. We find “Thunder” very appealing. But that’s not the criterion: the sports shooter has opted for a barrel length of 16.75 inches for this AR15 M5 Dynamic L model in the Austria version.

Thanks to KeyMod, the slim Free Float handguard allows for easy, shapely attachment of various accessories. A lightweight skeleton stock from Toni System with soft neoprene rest complements his Schmeisser AR15. The right tool is half the job. It helps extraordinarily during assembly and ensures a perfect result, a gun where everything fits and holds.

The upper is the first step. Here, it is clamped in the vice with a special holder, and then the custom project can begin. “Working with professionals for once”: on this day at Schmeisser, this dream came true … The first spring in this movement called a rifle is that of the Forward Assist. The expert explains the little tricks – and where to lubricate and how correctly.

The first pin on the AR15 attaches the Forward Assist. Let the games begin … Then comes the dust cover over the ejection port and the mount is changed. A special part in the case prevents it from being crushed or twisted. So then the barrel can already be put on. But this is even more work for us than for German shooters. This is because the rifle is an Austrian version, which differs from the German version by a few peculiarities: two pins that have to be set by hand, and separating the breech wart from the breech once.

Why? The legislator wants it that way … (and because German weapons don’t have that, they are considered “war equipment” in Austria, by the way, which is a nasty trap for ignorant sport shooters). This extra expense is also why a Schmeisser rifle costs more in Austria than in Germany. But with the right bore, what belongs together grows together … … and the technician here personally tightens so that the free-floating 16.75-inch Schmeisser barrel sits solidly in the upper. In between, a torque check takes place.And then it’s actually down to the small parts that are installed in this AR15 system.

The gas pressure tube is pinned into the gas block. Both together ensure that the pressure resets the bolt, and the gun thus works semi automatically in conjunction with the trigger group. How do you install this properly symmetrically?

Best .300 Blackout Lower Receivers in 2020

By using the rail as a guide. The technician checks from the front and pulls at the same time so that the gas block is properly seated. The new Schmeisser NoRec compensator is attached to the “good end”. Of course, it is placed exactly with spacer rings so that the openings on the right and left show horizontally. Now the upper half of the gun is ready. And it already looks very nice … The Best .300 Blackout Lower Receivers continues: on the left, an old model that can only be operated from the left side (from the shooter’s point of view). On the right, a new Best .300 Blackout Lower Receivers that allows bilateral operation of bolt catch and mag release. Now standard at Schmeisser … at no additional cost, by the way.

And old lower can be adapted to the new system. First part on the Best .300 Blackout Lower Receivers: the bolt catch is mounted. The Best .300 Blackout Lower Receivers housing is again clamped on a special mount. Then comes the magazine ejector (under the bolt catch) and the trigger group is completely finished. The trigger group is a Schmeisser Dynamic Drop-In Trigger and is characterized by having a very light, but noticeable pressure point with quick reset and is ideal for sport shooters. It is also great for technicians because it is extremely easy to assemble as a whole. The funnel is for Markus to find the hole easier. The Toni System Magwell makes it easier for the sport shooter to do a faster magazine change because he doesn’t have to be so careful where he puts the new magazine. It slides in almost by itself, so to speak …

What is the barrel in the front, is the stock in the back. The Toni System Stock model is extremely light and narrow and thus again has clear advantages for the sport shooter. Whether everything sits straight with the new Toni, here Markus checks it himself.Here a whole group of Austrians. A wart must be removed from the breech, which is done here for all of them. Then a new bluing is done. And one of them finds its way into Markus’ new rifle. Here, the bolt action lever with the breech group is added to the rifle.

And actually, the rifle is finished. Hot! Taking the finished rifle to the workshop for the first time: Markus checks it critically and is thrilled! Best Schmeisser technology, best work by Schmeisser technicians. The first shots are fired at the company’s own shooting range: this is used to check ad hoc whether the rifle holds up after assembly. It does. It was not to be expected otherwise. (In the video above you can see these test shots and also the first test run of Markus on the gun.)But still the new Schmeisser is naked. The lettering is now being created on the computer. Then the laser comes into play.

Correctly seen, the edition is made of Lego. Even big men like to play with it … Finished inscription: after everything fits, the gun can now be taken to the firing office, where it is exceptionally registered with the name of the new owner, Markus 2. That’s what you call individuality … Drilling for the last time: in Austria, the barrel must not be interchangeable, so the upper and barrel have to be pinned. A great day comes to an end. Markus with his new gun, the Schmeisser technician with the product of his work. Both satisfied and happy. It was extremely exciting to work together with Schmeisser experts, because he revealed many tricks and little things from his wealth of experience that ultimately make the device run like clockwork. There lies the good piece and then all off to the firing office. From there the AR15 M5 Dynamic L in the Austria version will come to Austria. The wait is worth it …

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