Best .300 Blackout Lower Receivers (2020) – Reviewed

Looking for the best .300 Blackout lower receiver might not be an easy task. However, with this article, you won’t have to worry about spending too much time and money in finding the best .300 Blackout lower receivers on the market.

This article will cover the best .300 Blackout lower receivers out there in the market to aid you with your search, if you are looking for an upper receiver, we have also reviewed them. These receivers were each made to serve for a purpose, not all of them are equal. Hence, it is up to you to choose which one would be the best for you as you take your personal preferences into account.

Components of a .300 Blackout Lower Receiver

It is essential for you to know the ins and outs of a .300 Blackout lower receiver before buying one. In summary, a .300 Blackout lower receiver consists the fire control group of your .300 Blackout rifle.

The .300 Blackout lower receiver is constructed of a trigger, disconnector, fire selector, magazine catch, and the hammer. The trigger assembly and the magazine are 2 of the most important components that are housed in a .300 Blackout lower receiver.

A .300 Blackout receiver is secured to the upper receiver by 2 pins. The split design of having 2 receivers is to allow the upper part to have more customization abilities, i.e. mounting a scope and etc.

Buying Consideration for a Lower Receiver 

Does it fit your barrel?

Perhaps one of the most important question to ask yourself is if whether the barrel would fit the lower receiver perfectly. The rule of thumb is that not all .300 Blackout barrels have the same length, some can go as short as 9 inches, extending to 20 inches, or more. Anyway, you should always find a .300 Blackout lower receiver that’s able to accommodate a barrel that you have in mind.

Installation

Not every gun owner is an expert or a veteran, so it is always crucial to find a .300 Blackout receiver that is easy to install so you won’t need any help with that. During installation, you might need some tools to put the lower receiver and the other parts together, but it should be easy enough for DIY purposes.

In looking for the best .300 Blackout lower receivers, the keyword that you would want to keep an eye out would be the term ‘drop-in’.

Fitting with your upper receiver

No matter how great your /300 Blackout lower receiver is, it’s useless if it doesn’t fit your upper well. Hence, it is always advised that you find a lower receiver from a certain brand, and an upper receiver from them.

That said, not all uppers from the same brand are compatible with their lower receivers, therefore you should always do a little research to find out if your lower and upper receivers match each other.

Top 4 .300 Blackout Receivers

You will find 4 of the best .300 Blackout lower receivers on the market. When looking at them, you should always take your personal preferences into account before making a decision.

1. PSA AR-15 MOE EPT Lower

Specifications

  • Machined from Aluminum Forgings 7075-T6
  • Hardcoat Anodizing: MIL-A-8625F, Type III, Class 2
  • Milspec diameter Receiver Extension
  • Magpul MOE Stock
  • Magpul MOE Grip
  • Staked M4 Lock Nut
  • Standard Carbine Buffer
  • Un-notched Hammer compatible with 9mm use
  • Calibre: Multi

Features

Crafted from 7075 -T6 aluminium, you know that this .300 Blackout lower receiver was built to last. Most great .300 Blackout lower receivers will be constructed with this kind of aluminium as it is perhaps one of the strongest materials that are used by materials for lower receivers.

One of the most notable features of this lower receiver is the buttstock that’s constructed from synthetic materials which would reduce the recoil from shooting your .300 Blackout rifle by absorbing most of the shock. If you hadn’t known already, .300 Blackout rifles pack a pretty heavy punch, if you shoot for long sessions, a buttstock like this would come in really handy.

Equipped with this .300 Blackout lower receiver is a PSA AR15/PA10 trigger. This trigger is a mil-spec trigger that has a nickel finishing. This would allow the trigger to be smooth and crisp experience as you shoot your .300 Blackout rifle. If you want your shots to get off quickly, this trigger would be perfect as it has a light amount of pull weight which is just right so you won’t have to apply too much pressure.

If you are looking for a reliable and affordable lower receiver for your .300 Blackout rifle, the PSA AR-15 MOE EPT Lower might just be your best possible choice for the reasons stated above.

You will like this product if:

You want a versatile .300 Blackout lower receiver. Unlike some lower receivers, the PSA AR-15 MOE EPT Lower pairs perfectly with most PSA upper receivers. With that in mind, you won’t have to worry about compatibility issues anymore.

You are shopping on a tight budget. Available for only $159.99, the PSA AR-15 MOE EPT Lower receiver would fall within the budget of most readers. Besides being affordable, you’ll also be getting a great trigger, buttstock, great versatility so you won’t have compatibility issues.

You might not like this product if:

You want a very light trigger. Although being a mil-spec trigger, some complained about the trigger pull where it was a little heavier than expected. If you are looking for a lighter trigger, the PSA AR-15 MOE EPT Lower Receiver might not be your best buy.

2. PSA AR-15 Complete Rifle Lower Receiver A2

Specifications

  • Lower Machined from 7075-T6 Aluminum Forging
  • Hardcoat Anodizing: MIL-A-8625F, Type III, Class 2
  • PSA classic fire control group
  • Mil-spec style  A2 stock
  • rifle length buffer and spring
  • Un-notched Hammer compatible with 9mm use
  • Calibre: Multi

Features

Compared to the previous lower receiver’s stock, this lower receiver comes with a stock that’s designed to look like a standard rifle’s fixed stock. If such a stock is what you’d want for your .300 Blackout rifle, you will love this lower receiver.

Constructed of 7075-T6 aluminium, you can expect this lower receiver to be as tough as nails and it will be more than capable of handling an AR rifle firing .300 Blackout rounds for a prolonged period of time.

One great thing about the PSA AR-15 Complete Rifle Lower Receiver A2 is that not only does it fit .300 Blackout rifles, it is also compatible with multiple calibre AR-style rifles. Hence, it doesn’t matter if it’s a 5.56, .223, or a .300 Blackout, this lower receiver would pretty much fit any rifle among the AR category.

Many users really loved the overall built quality of the receiver and the looks of the classic standard stock, hence they bought a few for the other AR rifles in their arsenal. Due to the versatility of the PSA AR-15 Complete Rifle Lower Receiver A2, you can do that.

Also, this lower receiver comes with the usual trigger assembly, pistol grip, and a buttstock that’s designed to give you a better control over your .300 Blackout rifle which in turn, brings the accuracy and shooting experience to a whole new level.

If you are a shooter that holds accuracy to a really high standard, this buttstock has recoil reduction features by absorbing a significant amount of shock as you shoot. Also, the pistol grip received lots of pleasant comments from users as it gave them a nice grip over their.300 Blackout rifle.

You will like this product if:

You love the classic look of a rifle. Many veterans really love the old school look of this lower receiver thanks to the classic fixed stock. If that’s something that you hold a deep appreciation for, you will enjoy shooting your .300 Blackout rifle with this lower receiver a lot more.

You want versatility. If compatibility has always been that one thing that makes you scratch your head as you shop, the PSA AR-15 Complete Rifle Lower Receiver A2 would do just the trick. Its compatibility with most AR-style rifles is pretty amazing. So when it comes to compatibility, you just got to make sure you’re going for an AR-style rifle.

You might not like this product if:

You want an adjustable stock. There are reasons why most people wouldn’t opt for the standard and classic fixed stock, because it doesn’t fit everybody. If you belong to one of them, you won’t like this lower receiver either. Besides that, if you really love the more modern aesthetics to your .300 Blackout rifle, perhaps getting an adjustable stock would be a better choice.

3. PSA AR-15 Complete MOE EPT SBA3 Lower

Specifications

  • Receiver is machined from 7075-T6 Aluminum Forgings
  • Hardcoat Anodizing: MIL-A-8625F, Type III, Class 2
  • 7075 Receiver Extension
  • Magpul Grip, Black
  • SB Tactical SBA3 Adjustable Brace, Black
  • Magpul Trigger Guard, Black
  • Standard Carbine Buffer
  • Enhanced Polished Trigger Group (EPT)
  • Calibre: Multi

Features

Just because you’re on a budget, it doesn’t mean you will get left out. You will still be able to get yourself one of the best .300 Blackout lower receivers like the PSA AR-15 Complete MOE EPT SBA3 Lower that’s available for only $179.99.

The PSA AR-15 Complete MOE EPT SBA3 Lower is constructed from the same 7075-T6 aluminium like the other PSA lower receivers on this article, so you know this one’s built to last too. One special feature of this .300 Blackout lower receiver is that it comes with a receiver extension that’s made from the same type of aluminium, increasing its durability.

Coming with a polished trigger that’s designed to give you a mil-spec style pull experience, you’ll feel that the trigger is slightly heavier but still able to get a no-creep trigger every time you shoot your .300 Blackout rifle.

The PSA AR-15 Complete MOE EPT SBA3 Lower’s buttstock is designed specifically to absorb a significant amount of shock in order to give you as much control of your .300 Blackout rifle as it can. Besides that, this lower receiver’s stock is also adjustable so you can have a very personalized shooting experience with your.300 Blackout rifle.

If you want a reliable product that doesn’t break the bank at the same time, you’re looking at the right .300 Blackout lower receiver.

In terms of versatility, the PSA AR-15 Complete MOE EPT SBA3 Lower is compatible with most of PSA’s upper receivers. Therefore if you worry about compatibility issues often, you won’t have to if you opt for the PSA AR-15 Complete MOE EPT SBA3 Lower Receiver.

You will like this product if:

You have a tighter budget. With a reasonable price tag of $179.99, most readers would consider this price range as affordable for one of the best .300 Blackout’s lower receivers. Made from  7075-T6 aluminium, you won’t be looking for another .300 Blackout lower receiver in a long time.

You have difficulty in finding the right fit. Unlike some .300 Blackout lower receivers that come with a fixed stock, this one’s adjustable. With an adjustable stock, you’ll be able to reach for your .300 Blackout rifle and be dead-on with the right adjustments.

You might not like this product if:

You want a lighter trigger. Although many shooters would have no problem with the mil-spec trigger on this lower receiver, some weren’t too happy with the aluminium factory trigger that’s included in this lower receiver.

4. PSA AR-15 Complete Classic Lower

Specifications

  • Machined from Aluminum Forgings 7075-T6
  • Hardcoat Anodizing: MIL-A-8625F, Type III, Class 2
  • Milspec diameter Receiver Extension
  • M4 Stock
  • Staked M4 Lock Nut
  • Standard Carbine Buffer
  • Un-notched Hammer compatible with 9mm use
  • Calibre: Multi

Features

If you are looking for one of the best, fully-assembled .300 Blackout lower receiver for your rifle, the PSA AR-15 Complete Classic Lower Receiver might just be your best option. Everything is already assembled for you, all you need to do is to install it with the rest of your .300 Blackout rifle.

The installation process can also be quickly done, so you will most probably be able to give this a whirl on the same day. The PSA AR-15 Complete Classic Lower Receiver would be a great option for you if you are looking for something that is as close to the military-style receiver as possible.

Material wise, it’s the usual 7075-T6 aluminium from PSA on this list. Made to last by PSA, you can expect this .300 Blackout lower receiver to endure through the worst weather conditions with you as you hunt/shoot on the range. You will never have to worry about getting your lower receiver, especially the stock, damaged from unfavorable weather.

Besides being made from top quality aluminium, the PSA AR-15 Complete Classic Lower Receiver features an M4 stock that’s designed to give you the maximum support by absorbing a great deal of recoil so you can have as much control of your .300 Blackout rifle.

A notable feature for the PSA AR-15 Complete Classic Lower Receiver is that it is compatible with almost any calibre within the AR family, including .300 Blackout rifles. Top that with the fact that it’s already fully assembled, you’ll want to get your hands on this lower receiver as soon as possible.

You will like this product if:

You want a .300 Blackout lower receiver that’s fully assembled for you. If you don’t want to go through to hassle of assembling your .300 Blackout lower receiver together, the PSA AR-15 Complete Classic Lower Receiver is perhaps the best-assembled receiver on the market.

You want a versatile lower receiver. If you happen to own more rifles besides a .300 Blackout, you’re in luck. The PSA AR-15 Complete Classic Lower Receiver would fit almost any caliber within the AR category and hence, you won’t have any compatibility issues.

You might not like this product if

You want really premium triggers. Although most users were satisfied with the trigger on the PSA AR-15 Complete Classic Lower Receiver, some complained that the trigger pull was a little gritty upon initial use.

Frequently Asked Questions

Q: What lower receivers do you need for a .300 Blackout Rifle?

In short, you would want to look for the Standard AR-15 parts. There won’t be a problem if you use a standard AR-15 lower to build your .300 Blackout rifle. The main difference between a .300 Blackout rifle and a 5.56mm NATO rifle is essentially just the barrel.

Q: What is the optimal length for a .300 Blackout?

In short, the optimal barrel length for a .300 Blackout is 9’. This is because .300 Blackout cartridges burn all their powder, which allows them to achieve optimal velocity by travelling through the shortest barrel length possible.

Q: What is the effective range of a .300 Blackout?

From a 16’ barrel, a 125 gr .300 Blackout round has a lower velocity and a similar bullet drop and drift at shorter displacements. That said, it still carries the same amount of energy at 700 meters that the M855 has at 500 meters. In relation to hit probability, the .300 Blackout has an effective range of 460 meters.

Q: Is a .300 Blackout good for hunting?

A .300 Blackout has all the attributes necessary to make it well suited for hunting animals. Like many hunting rounds, the .300 Blackout is a 30-calibre cartridge, and since they were intended to be subsonic suppressed, it only makes it better for hunting.

Q: What are the advantages of using a .300 Blackout?

The .300 Blackout was designed to the AR-rifles extra power and penetration on intermediate ranges with less recoil while holding a 30 round mag. The original intent was to provide an outstanding terminal performance and accuracy while travelling through suppressed with a subsonic or a standard round.

Q: What is the difference between subsonic and regular ammo?

In simple terms, subsonic means that the round is moving slower than the speed of sound, whereas supersonic would mean that the bullet is breaking the sound barrier, travelling faster than the speed of sound, which produces a mini sonic boom.

An example of a supersonic round is the 9mm as most 9mm rounds have a muzzle velocity of over 1100 feet per second.

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