Top 6 Best .300 Blackout Accessories [June 2023]

If you have ever fired an AR-15 .300 Blackout rifle, chances are, there are parts of the rifle that you love and the parts where you wish it was better. This makes lots of sense as different shooters would have different shooting preferences and these shooting preferences would require different accessories. While some shooters enjoy shooting with a suppressor, some don’t and etc.

The AR-15 platform, besides being nice to shoot, it’s also pretty customizable. There are almost endless ways that you can personalize your .300 Blackout AR-15. By upgrading some components on your rifle, you will be able to build the best AR-15 for you.

And what would be the results from that? Better accuracy and more joyful shooting experience. Whether you believe it or not, how your rifle feels on your hands can improve your overall shooting accuracy by a stunning 45%! The even better news is that in most cases the installation of these accessories is so easy, you won’t even need a gunsmith to install the accessories for you.

Accessories Name Editor’s Comment Get The Best Deal
Primary Arms 1-6×24 SFP Riflescope 1. Red partial illumination
2. Fast focus eyepiece
3. Fog resistant
VG6 Precision – AR-15 Gamma 300BLK Muzzle Brake 1. Easy to install
2. Great aesthetics
3. Cutting-edge engineering and manufacturing process
D&H AR-15 300 AAC Blackout 20 Round Magazine 1. Body made of 6061-T6 Aluminium
2. Tefolon coated for smother feeding
3. Made in the USA
Gemtech – GMT-.300BLK Suppressor 1. Very silent
2. Reduces recoil considerably
3. Fits easily on all .300 Blackout Rifles
PSA AR-15 MOE EPT Lower 1. Pairs perfectly with most PSA uppers
2. Secured properly in all the right places
3. Great trigger pull
Currently unavailable

Top 5 Best 300 Blackout Accessories and Upgrades

1. Gemtech – GMT-.300BLK Suppressor


Best .300 Suppressor


  • Cartridge: 300 AAC Blackout
  • dB Reduction: 36dB-36dB
  • Diameter (in): 1.5
  • Finish: Flat Dark Earth
  • Full Auto Rated: No
  • Length: 6.7
  • Style: Direct Thread
  • Threads: 5/8-24
  • Weight: 14.0 oz
  • Made in the USA


From just a simple glance, you know that the Gemtech GMT .300 Blackout Suppressor is going to be super easy to assemble as it is an easy to install suppressor. Made in the USA, and constructed with a titanium G-core, this suppressor was made to last.

This suppressor will be able to provide a great deal of noise reduction that perhaps non of your shooting buddies are going to expect. With this suppressor mounted on your 300 Blackout Rifle, you will be getting the noise from your rifle down to only around 130 decibels, this means that you won’t have to worry about taking your ear protection around as you shoot.

Having being guaranteed by the manufacturer to bring the noise down right around 36 decibels, is pretty impressive. Whether you’re firing supersonic or subsonic 300 Blk rounds, this suppressor will do the job for both.

If that is what you want, the Gemtech is the right suppressor for you. It doesn’t matter if you’re using it just for hunting and/or for mere home defense purposes, this suppressor will show its full potential when the situation warrants it.

With this suppressor, you’ll become a silent and deadly hunter of animals and/or any possible home invaders. Besides that, this suppressor also reduces your .300 Blackout rifle’s recoil by a significant amount. If you are suffering from shoulder sores caused by recoil, you will like this suppressor.

You will like this product if:

You want to shoot without ear protection. Having been guaranteed by the manufacturer itself to bring the noise from your .300 Blackout rifle to only around 36 decibels, you won’t need any ear protection while firing your 300 Blk rifles. If you are shooting with your buddies, the noise level of your gun with this suppressor mounted on will surely amaze them.

You suffer from a sore shoulder. Many shooters suffer from sore shoulders due to the recoil after shooting for extended sessions. With the Gemtech GMT 300 Blackout suppressor, not only will it reduce the noise levels from your gun, it reduces the recoil significantly as well.

You might not like this product if:

You want an automatic fire-rated suppressor. Unfortunately, this suppressor isn’t automatic fire-rated. If that is the specs that you are looking for, this suppressor won’t be your best buy.

You have a tight budget. Available on for $899.99, this isn’t exactly the most affordable price tag for those that have a tighter budget. However, if you’re willing to spend a little more, this suppressor gets the job done and you will have no regrets.


2. VG6 Precision – AR-15 Gamma 300BLK Muzzle Brake


Best .300 Blackout Muzzle Brake


  • Caliber: 30 Caliber
  • Finish: Bead Blasted Stainless Steel
  • Material: Stainless Steel
  • Threads: 5/8-24
  • Optimized for 10.5″ to 18.5″ barrel lengths
  • Machined 17-4 PH stainless steel
  • Available in gray-silver BBSS (bead-blasted stainless steel) finish OR with a hard Blacknitride™ finish
  • Fits muzzles with 5/8″-24 TPI threads
  • Crush washer included


Although VG6 Precision only started recently in 2013, it has since been known to be producing top-quality muzzle devices. The Gamma .300 Blackout muzzle brake comes with a high-performance design in order to reduce as much recoil as possible.

The VG6 Precision – AR-15 Gamma 300BLK Muzzle Brake is essentially a hybrid muzzle decides that has 2 functions: it eliminates recoil and minimizes any muzzle rise as you shoot. Hence, as long as you mount this muzzle brake on, you will be able to shoot as accurately as possible which boosts your confidence over the shooting range.

In terms of construction, VC6 has cutting-edge engineering techniques such as computational fluid dynamics and computer-aided engineering which has got them to where they are today in the muzzle device industry. The VG6 Precision – AR-15 Gamma 300BLK Muzzle Brake is also machined from heat-treated stainless steel using their precision CNC technology.

Having been completely manufactured in the USA, you know that this muzzle brake is also designed for maximum versatility. This muzzle brake is compatible with barrels between 10.5’ to 18.5’ long, and can occasionally work with other barrel lengths too on a case to case basis.

The VG6 Precision – AR-15 Gamma 300BLK Muzzle Brake fits a 5/8 threading perfectly and it also comes with a crush washer. In terms of color options, it comes in bead-blasted stainless steel, grey-silver, or black nitride. This muzzle brake is known to be one of the best muzzle brakes that is both effective and aesthetic.

You will like this product if:

You want an easy installation. The VG6 Precision – AR-15 Gamma 300BLK Muzzle Brake is really well designed and constructed. It fits a 5/8 threading perfectly so you won’t have to go to your gunsmith to get it installed on your barrel.

You want great aesthetics. Since this muzzle brake comes in 3 incredible color options, it will aesthetically match your rifle according to your personal preferences. This muzzle brake will put a smile on your face whenever it reminds you of its great aesthetics and performance.

You might not like this product if:

You want the most secure fit. Unfortunately, even one of the best .300 Blackout muzzle brakes has its shortcomings. For the VG6 Precision – AR-15 Gamma 300BLK Muzzle Brake, although being able to thread it onto your rifle is of great convenience, it doesn’t provide the most secure fit.


3. Best .300 Blackout Magazine: D&H AR-15 300 AAC Blackout 20 Round Magazine



  • Capacity: 20-Round
  • Cartridge: 300 AAC Blackout
  • Finish: Black
  • Material: 6061-T6 Aluminum
  • Quantity: 1
  • Made in the USA
  • Made for AR-15 platforms


The manufacturer of this magazine – D&H Industries makes various accessories and compartments for AR-15s and this includes great quality magazines like the D&H AR-15 300 AAC Blackout 20 Round Magazine. This magazine is available in capacities of 10,20, and 30 rounds that come with a slick black or grey finish to match your .300 Blackout rifle well.

With the body constructed from heat-treated aircraft-grade 6061-T6 aluminum and encompassing 17-7PH stainless springs that were pre-compressed, you can expect the D&H AR-15 300 AAC Blackout 20 Round Magazine to last you for many years to come without looking for a replacement. In addition, the magazine is Teflon coated for better lubrication to encourage smoother feeding.

While it is clear that the D&H AR-15 300 AAC Blackout 20 Round Magazine was dedicated to the .300 Blackout round, the magazine is also dimensionally adjusted to perform smoothly with the wider range of projectiles of the .300 Blackout round.

Unlike your standard straight 20 round 5.56 NATO mags, the D&H AR-15 300 AAC Blackout 20 Round Magazine features an internal rib that’s positioned to enhance its functions with a broader variety of projectiles among the .300 Blackout round.

D&H Tactical is known as the leading supplier of aluminum magazines that utilizes altered dimensions that make their magazines more versatile. As a dedicated magazine, the D&H AR-15 300 AAC Blackout 20 Round Magazine should be your number 1 choice for most heavy sub-sonic .300 Blackout rounds.

You will like this product if:

You are a hunter. Hunters tend to stick to heavier, sub-sonic .300 Blackout rounds as they hunt for heavier animals. This is because heavier bullets like the subsonic .300 Blackout round carries more energy. This magazine comes with a 20-round capacity and it’s received tons of great feedback from hunters.

You want smooth feeding. The D&H AR-15 300 AAC Blackout 20 Round Magazine features a constant-curve internal geometry. Along with D&H’s proprietary red anti-tilt self-lubricating follower, feeding will be a breeze.

You might not like this product if:

You use ultra-long bullets. Unfortunately, even a great product like D&H AR-15 300 AAC Blackout 20 Round Magazine as its shortcomings. Some users have mentioned that when handloading with ultra-long bullets, they may get jammed up in the magazine.


4. Primary Arms 1-6×24 SFP Riflescope (Gen III)


Best .300 Scope


  • Objective Lens Diameter: 24 mm
  • Magnification: 1 – 6 x
  • Tube Diameter: 30 mm
  • Reticle Focal Plane: Second Focal Plane (SFP)
  • Exit Pupil: 4 – 9 mm
  • Battery Type: CR2032
  • Battery Quantity: 1
  • Field of View, Linear: 110 – 19.3 ft at 100 yds
  • Eye Relief: 3.3 – 3.5 in
  • Color: Black
  • Fabric/Material: 6063 Aluminum
  • Length: 10 in
  • Illumination Type: LED
  • Illumination Color: Red
  • Adjustment Type: MOA
  • Adjustment Click Value: 0.5 MOA
  • Weather Resistance: Fog Resistant
  • Water Resistance Level: Waterproof
  • Shockproof: Yes
  • Fogproof: Yes
  • Finish: Matte
  • Magnification Type: Variable


The Primary Arms 1-6×24 SFP Riflescope (Gen III) comes with a chevron center aiming point ACSS .300 Blackout that’s specifically designed for medium-range and CQB scenarios. If you are looking for a scope for short-medium shooting ranges and/or home defense, this scope would be a great option for you.

Being constructed from 6063 aluminum, the Primary Arms 1-6×24 SFP Riflescope (Gen III) would feel extremely sturdy. Besides that, it also features multi-coated lenses, it’s fog proof, nitrogen purged, and water-resistant. Now, you won’t be hiding your scope when it starts raining because this scope can take it all with ease

Furthermore, the reticle/crosshair comes slightly highlighted in red and is operated by a CR 2032 battery that’s specifically designed to give you 12 brightness options. Under low light situations, the Primary Arms 1-6×24 SFP Riflescope (Gen III) would be your best partner.

In terms of functionality, capability, and reliability, the Primary Arms 1-6×24 SFP Riflescope (Gen III) provides one of the best performance you can ever expect on a .300 Blackout scope. In the unlikely event where you come across any minor defects or issues in relation to the scope, Primary Arms would be more than happy to sort that out for you.

Aside from that, the scope is also really easy to use, and many shooters were surprised by that. The battery that comes with the scope is pretty reliable and after a whole day of shooting, you won’t notice any blurring issues on the scope.

You will like this product if:

You want great eye relief. With a nice highlighted red crosshair and 12 brightness settings, you won’t be straining your eyes as you hunt in early mornings, late evenings, or under low light conditions.

You are a long-range shooter. The increased precision of AK on this scope would allow you to observe your target clearer as you shoot at longer distances. This would largely improve your aim and accuracy.

You might not like this product if:

You want a lighter scope. To some shooters, they felt that the scope was slightly heavier than what they expected. If you want a lightweight scope, maybe this wouldn’t be the best option. However, you should take note that the slightly heavier weight implies that it’s also well constructed.


5. PSA AR-15 MOE EPT Lower

Best .300 Blackout Lower Receiver


  • 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
  • Caliber: Multi


Crafted from 7075 -T6 aluminum, 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 aluminum 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.


What is the effective range of a 300 Blk?

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.

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-caliber cartridge, and since they were intended to be subsonic suppressed, it only makes it better for hunting.

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 traveling through suppressed with a subsonic or a standard round.

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