Best 300 Blackout Accessories: Upgrades You Want to Consider

A 300 Blackout is a popular caliber weapon originally designed for military use. The design is based on the familiar AR-15 body and use, but has been modified to use a wide range of .30 caliber ammunition. What makes it so sought after is how easy it is to continue to personalize and build in the same manner as the more widely known AR-15.

Having the ability to modify certain parts of the rifle allows you to upgrade and make your weapon a more customized choice for maneuverability and comfort when shooting. This article explores the various features you may want to consider, as well as some of the best 300 Blackout Accessories you can buy. 

Here’s A Quick Look of Our 7 Best 300 Blackout Accessories

Why You Want to Upgrade

man hunting

There is nothing wrong with being in love with shooting your 300 Blackout exactly how you bought it, but can you imagine what it might feel like to have a more customized fit? Building your own weapon introduces a more personalized shooting experience, and can  fit your stance, arm length, grip size, and optics (to name a few) for a truly awesome time. 

Rather than call these products accessories, we prefer to call them upgrades. Afterall, you are replacing or adding an option that makes your 300 Blackout more accurate, comfortable, and fun to shoot. You also are adding or replacing parts that leave you with more than what you started with, and the more firearm options you have the better!

What’s even more awesome, you don’t have to bring your rifle to a gunsmith for the majority of upgrades- meaning you can do it on your own. Overall, it is estimated you can improve your shooting accuracy up to 45% when you have a rifle that feels comfortable and well-balanced in your hands. 

What To Check For

Sometimes, but not always, you may run into a state law that requires permissions (such as the addition of a suppressor), or is not allowed. So before you start with your customizations, make sure to become well versed in your state laws. If you are unsure of where to start with this, check in with a local firearm dealer who will either know, or know where to find the details of your concerns. 

Upgrade Options

Accessories for a 300 Blackout

There are actually A LOT of various upgrades you can consider for your 300 Blackout. These include products such as grips, trigger and trigger guards, sights, extended bolt releases, barrels, muzzle devices, and sling mounts- just to name a few. However, there are some choices that are much more popular than others due to the convenience of their addition.

These popular accessories for a 300 BLK are just a sample of the most easily explored and added to your weapon. If you are new to a weapon build, these products are where you may want to start.


How your rifle feels when you hold it and shoot has a lot to do with your accuracy and consistency when shooting over long periods of time. Modifying and upgrading your grip is a common option as various materials are used to fit your needs. Choose from smooth, ridged, polymer, rubber, and even fiberglass reinforced products. 

Other details to pay attention to include width, finger grips, angle, and even recoil absorption. 

Sights And Optics

Sights, and other optics, are incredibly important for sighting in your rifle. Many 300 BLK models do not come with sights, much less a scope, so it is important to find the type that is easy for you to quickly spot within a clear manner. 

Extended Magazine Releases

gun in white background

Extended magazine releases help customize the feel of releasing your magazine. These are especially popular with competitive shooters who need to be able to more quickly reload and struggle with the teeny-tiny magazine release. 


Triggers are another common technical upgrade as they are a major part of the control you have over your round. A good trigger has a comfortable amount of resistance, but also provides the customization you need for the shooting experience you are involved in. For example, a single stage trigger may be exactly what you need for home defense and certain target experiences, such as hunting. Two stage triggers are often best for competitive shooting and recreational shooting toline up a target while you have pressure on the trigger before firing. 

Trigger Guards

Trigger guards are often installed to help enlarge the guard area. This is a major safety choice and can help create a more comfortable, and safe shooting experience. They are especially popular with those who have larger hands, wear gloves, or anyone who wants extra room to avoid chafing during long shooting days. 

Muzzle Brakes

Muzzle brakes are highly popular upgrades as they help redirect the gas that follows a bullet out of the muzzle by venting it out the sides, and pushes forward on the brake. In doing so it minimizes the recoil and climb of the muzzle. This helps you create a more accurate cluster, and reduces shooting fatigue. 



Additional ammunition magazines are always a welcome product for shooters, especially those that can hold more rounds than what came as a default with your weapon. 


Free-floating handguards are much more than an obvious visual customizable piece. They serve as a ventilation point for heat release from the barrel. Many also have an included railguard that you can use to attach even more accessories, such as lights, lasers, and backup sights. 


Stocks are occasionally adjustable, but when they aren’t, you may find yourself wishing you could create slight adjustments against your shoulder for shooting comfort. Material choices, width, and adjustability are all reasons to buy and aftermarket choice, and the correct match for you can make you a more efficient shooter. 


Suppressors are designed to be used with AR style builds, and are a choice many 300 BLK owners choose to help muffle the sound of their shot, as well as improve accuracy. Most are highly interchangeable with various calibers as well.

Top 7 of the 300 Blackout Accessory Reviews

Part of the awesomeness of a 300 BLK is they are built from an AR style frame, which makes parts easily interchangeable. This gives you a huge range of accessories from which to pick from to create the best shooting experience you can. These top picks highlight popular upgrades and quality product choices. 

1. G6 Precision – AR-15 Gamma 300BLK Muzzle Brake

G6 Precision - AR-15 Gamma 300BLK Muzzle Brake
  • Accessory Type: Muzzle Brake
  • Use: Reduce lift and recoil

Muzzle devices are some of the easiest upgrades you can invest in and the G6 Precision Gamma Muzzle Brake is one of the best you can buy for your 300 Blackout Rifle. This isn’t just a muzzle brake, but serves as a compensator that works to help discharge gasses and reduce lift and recoil. 

This is exactly what you need to help keep your barrel steady and get another shot off with lightning quick accuracy. Designed for 10.5 to 18.5 inch barrels, this is a great choice for some pistol, and many rifle set-ups. It fits easily onto your muzzle with a ⅝ x 24 inch thread. 

Who This Is For

Stabilize your shooting experience through a reduction of lift and recoil, making competitive shooting and follow-up shots a quick and easy experience. 


  • Incredibly easy to attach
  • Powerful 17-14 stainless steel design
  • Two colors of finishes to choose from


  • Hard to find any, but the fact it isn’t available for barrels under 10.5 inches is a downfall

2. Q – Thunder Chicken 7.62mm/300BLK/300wm Suppressor Quickie Fast Att

  • Accessory Type: Suppressor
  • Use: sound suppression, shooting accuracy

The Q Thunder Chicken is not only manufactured by one of the best in the business, it is one of the quietest and versatile you can buy. At 8.2 inches it is a great size for both rifles and pistols, and is for use with 7.62 NATO, 300 BLK, and 300 WM rounds. It suppresses, on average, 30 decibels, and makes your shooting experience much more enjoyable. 

Made from an Inconel 718 and Grade 5 Titanium, the integrated baffle design suppresses flash, and is incredibly durable and long-lasting. Weighing in at 15 ounces it is also one of the lightest available, and is easy to put on and remove with the Quickie Fast Attach. To help not only muffle sound, but also increase your shooting accuracy. It also is full-auto rated. 

Who This Is For

When you want a quality suppressor, this is an excellent choice, plus the name can’t be beat!


  • Lightweight and crazy quiet
  • Great length for multiple weapon swaps
  • Very easy to use the Quickie Fast Attach system 


  • Is a bit pricey overall

3. Hogue Overmolded Collapsible Stock

Hogue Overmolded Collapsible Stock
  • Accessory Type: Adjustable Stock
  • Use: recoil reduction, comfort shooting, anti-rattle feature

The stock, or buttstock, is one of the more important pieces for holding, aiming, and shooting comfortably. This rests up against your shoulder, and is the part that takes the brunt of the recol vibration. Not only does it attach incredibly easily, it also adjusts so you can get the perfect fit for your arm length. 

It boasts an overmolded recoil pad to help reduce shoulder pressure. Plus the rubberized cheek rest makes it facial hair friendly. The top of the overmolded recoil pad is slick so it doesn’t slow down your aim. It also has multiple options to attach a sling. 

Who This Is For

Anti-rattle features and a comfortable surface that doesn’t hang up is what makes this stock worth every penny. It is a quality, long-lasting choice. 


  • Softened pad reduces recoil significantly
  • Quick detach sling-swivel points are helpful
  • Beard- friendly!


  • May need a break in period 

4. Geissele 2 Stage (G2s) Trigger

Geissele 2 Stage (G2s) Trigger
  • Accessory Type: 2-Stage Trigger
  • Use: M4 Bow, 2-stage lightened pull

Triggers need to fit your finger and your comfort level concerning weight and precise control. 2-stage triggers are perfect for competitive and recreational shooting, and with enough familiarity makes it a great choice for home defense as well. The Geissele Trigger is a cost effective option that is designed for quality and durability. You can use it over and over with no worry. 

With a total pull weight of 4.5 lbs, this is split fairly evenly between each stage. This lightens the pull compared to a standard trigger. The pin size is also Mil-Spec to make it fairly universal in its fit. The bow type is an M4 bowed for a comfortable finger fit. 

Who This Is For

When you want a lighter, quicker trigger pull for accuracy and dependability, this is worth considering. 


  • Excellent for any use
  • Easy to install with directions
  • Easy to control stage pulls with lightened weight


  • Not adjustable

5. Tacstar – AR-15 Rear Grip

Tacstar - AR-15 Rear Grip
  • Accessory Type: Rear Grip
  • Use: Stabilization and comfort

Grips are fairly inexpensive and there are many on the market to choose from, but the Tacstar Rear Grip stands out amongst its competition. The enhanced features include slim shape for better comfort to a wider range of people, shallow finger grooves, and easier trigger reach. 

It also has a non-slip, overmolded construction for hand comfort when shooting. The rugged design is also impervious to cleaning agents, and is long lasting. Aftermarket grips are popular to help fit the hand for better comfort and overall accuracy. 

Who This Is For

This is great for a wide range of people, especially those who have a more narrow grip or smaller hands. 


  • Durable material does not mark or wear easily
  • Comfortable grip
  • Awesome price 


  • May not work for everyone

6. Vortex Optics – Strike Eagle 1-8x24mm Rifle Scope

Vortex Optics - Strike Eagle 1-8x24mm Rifle Scope
  • Accessory Type: Scope
  • Use: Magnification of targets, clarity of shooting

When looking for a good rifle scope that won’t take out your entire bank account, Vortex optics has you covered. Their Strike Eagle 1-8x24mm scope adapts to a huge range of shooting scenarios to provide you easy to adjust, and quick engagement with a target without having to fiddle around with focus. 

The glass etched, illuminated AR-BDC3 reticle is best for both near and far rapid firing, and has range references up to 650 yards. The thread in lower level allows for fast magnification when adjustments are needed. Water, fog, and shockproof, this is built for the outdoors and will last you as long as you need it. 

Who This Is For

When you want a high quality, yet more budget friendly scope, this is a great choice. It holds its own against more expensive models, and it looks good to boot. Plus, it includes the mount. 


  • Fully multi coated lenses keep them from fogging up 
  • Throw lever is awesome for switching from close to long shots
  • Easy to zero and maintains clarity


  • Max magnification is 8x

7. D&H 300BLK 30RD AR-15 Magazine

D&H 300BLK 30RD AR-15 Magazine
  • Accessory Type: Magazine
  • Use: Additional ready ammo

Probably one of the first extras you may decide to invest in is an extra magazine. Even though most AR style weapons come with 30 capacity magazine, it is easy to go through a full magazine in no time, and having an extra (or two) on hand will save you time and keep you from having to reload. 

These are incredibly budget friendly and having a few of various sizes read to use is helpful. The D&H 300 BVK magazines are designed specifically for a .300 BLK round, so you don’t have to worry about compatibility. It also has a red follower so there is no mistaking against others when empty. This model comes in a 30 round, as well as 20 and 10 and can take a 5.56 and .223 round as well without issue. 

Who This Is For

This is a dependable, durable magazine specific for the 300 BLK. If you want an additional magazine, this is it. 


  • Black Mil-spec hardcoat anodizing finish
  • Pre-compressed springs make it easy to load, and is built for a long, dependable life
  • Red follower makes it easy to spot and to avoid mixing it up with others


  • Edges may be sharp


Accessories are more of an upgrade than anything else and should definitely be considered to help personalize, and customize your shooting experience. Although there is quite a large range of aftermarket additions and upgrades you can take advantage of, the most common, and popular choices, have been discussed above. 

These products range from highly affordable to help make your experience more comfortable and accurate, to a bit more pricey for more advanced shooting. Whatever you decide, they all can only enhance your rifle comfort for a more personalized and customized fit.

Also see the best buffer springs for 300 blackouts here.