Best Gas System For 300 Blackout

When it comes to outfitting your pistol or rifle with the proper components, you might find yourself buried in a pile of options with no way to dig out. This is especially true when you’re picking out the best gas system for a 300 Blackout rifle or pistol, since there are tons of options of varying prices and qualities.

Choosing the right one takes some careful research and consideration so that it fits your firearm perfectly, and you need to make sure you look at all components of the gas system when you make that choice. This includes the gas block, the high-pressure gas, the tube, and the bolt carrier group. How do you know that you’ve found the best gas system for a 300 Blackout?

A Quick Look At Our 10 Best Gas System For 300 Blackout

What To Look For In A Gas System For 300 Blackout

GEISSELE SUPER GAS BLOCK (SGB), STAINLESS STEEL ‒ 05-807

To decide which gas system is going to be the best buy for your needs, you should start by examining the material from which it’s made. Because you want to make sure the gas system doesn’t corrode and can take whatever damage may come, you want high quality materials, such as steel, when you purchase your gas system.

You should also take a look at the method of installation and how difficult this is. For easy installation without the help of a professional, you’ll want to likely opt for a drop-in system. Also, you’ll want to decide if you’re going to purchase an entire system or get the pieces separately, since gas systems are sold both ways. You may be able to save money by piecing out the gas system, but you’ll have to make sure all those components are compatible as well.

Top 10 Best Gas System For 300 Blackout

Are you getting ready to install a new gas system for your 300 Blackout rifle or pistol? Get started with these reviews of some of the best gas systems available so you have more information and can narrow down your search.

1. 2A Armament Lightweight Adjustable BCG

2A ARMAMENT LIGHTWEIGHT ADJUSTABLE BCG _ 2A-LWBCG-A
  • Weight: 7.9 ounces (assembled)
  • Materials: 8620 steel, 9310 steel, 7075-T6 anodized, 6AL-4V Titanium, heat treated QPQ Nitride
  • Components: Carrier, Bolt, Rear Body, Extractor, Carrier Key, Regulating Gate
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The 2A Armament Lightweight Adjustable BCG isn’t exactly a traditional gas system. In fact, it’s a bolt carrier group, but because of its structure, it ranks highly on the best gas systems list. Aside from being a great BCG for your 300 Blackout rifle, it also has a built in gas regulation gate. This means you have a drop in gas system and don’t need to worry about fitting an adjustable gas block to your rifle.

As a drop in accessory, the BCG lends itself well to easy installation, so you have a hassle-free time and fit. In addition, any adjustments you need to make here are available quickly and readily through the port door. It’s lightweight and easily swappable with your firearm’s factory full weight system. It’s compatible with a wide range of buffer springs, barrel lengths, suppressors, and other accessories as well.

Who Should Buy a 2A Armament Lightweight Adjustable BCG?

The 2A Armament Lightweight Adjustable BCG is a perfect solution for someone looking for a combination of a lightweight BCG or RBC with the ability to choose not to purchase an additional adjustable gas block. It’s a great choice for those who want easy installation and simple and quick swapping to manufacturer parts.

Pros

  • Easy installation
  • No need for an adjustable gas block
  • High quality materials mean incredible durability

Cons

  • Not for the budget conscious

2. Geissele Super Gas Block

GEISSELE SUPER GAS BLOCK (SGB), STAINLESS STEEL ‒ 05-807
  • Weight: 1.6 ounces (gas block and hardware)
  • Materials: stainless steel
  • Components: Gas block only
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The Geissele Super Gas Block is an ideal choice for retrofitting and replacing a gas block to almost any AR-style firearm, especially if you are using 300 Blackout rounds. The installation process is simple, with little effort required. Simply fit to your rifle and connect to the gas tube of your choosing. The bore is .750 inches, which is pretty standard and means it’ll fit just about anything to meet your needs.

This makes it quite versatile. Also, it’s constructed to be durable, using stainless steel. It’s very lightweight so you don’t have to be concerned that your firearm is going to get weighed down once it’s installed. It’s also compatible with a number of M4 carbines, in case you have the need. This makes the affordable piece versatile and worth keeping on hand, in case you need a replacement in a pinch.

Who Should Buy a Geissele Super Gas Block?

If you’re looking for a quick and easy gas system part to replace, it makes sense to have the Geissele Super Gas Block on hand. It’s perfect for those who are on a budget and want to replace or retrofit a new gas block to their 300 Blackout rifle, with compatibility to most AR and M4 carbine platforms.

Pros

  • Quick and easy installation process
  • Fits most 300 Blackout rifles
  • Readily compatible with most gas tubes

Cons

  • Not as substantial as some competitors

3. CMMG Pistol Length Gas Tube with Roll Pin

CMMG PISTOL LENGTH GAS TUBE WITH ROLL PIN - 55DA15F
  • Weight: 1.28 ounces (with roll pin)
  • Materials: stainless steel
  • Components: Gas tube, roll pin
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The CMMG Pistol Length Gas Tube with Roll Pin is one of the most durable and reliable systems available for 300 Blackout pistols. With excellent resistance to corrosion, this particular gas tube and roll pin are going to outlast quite a few of the other systems on the market, since you can use them through thousands of rounds without worrying about damage.

This gas tube is meant to be used with pistol length firearms, not rifle length, and as such, it comes with the tube and the gas tube pin that is used to hold it in place once installed. It’s quite reliable for use with 300 Blackout subsonic rounds, which is hard to find in the marketplace, making this a great piece to add to your setup. In addition, the cost is reasonable, so you can incorporate something that gives you excellent performance on your 300 Blackout pistol without worrying about overspending.

Depending upon the gun regulations where you live, you may also be able to use this gas tube system with a SBR or a PDW. Check with the laws in your jurisdiction prior to purchasing.

Who Should Buy a CMMG Pistol Length Gas Tube with Roll Pin?

The CMMG Pistol Length Gas Tube with Roll Pin is perfect for someone who needs a reliable gas system on a 300 Blackout pistol, SBR, or PDW, and who has the legal ability to use it in their jurisdiction. It’s valid for those looking for increased reliability and durability while also working with more stringent budget restrictions.

Pros

  • Reliable gas system for use with subsonic rounds
  • Excellent buy for the price
  • Easy installation

Cons

  • Cannot be used in some jurisdictions due to varying gun laws

4. Brownells 10.5” 300 Blackout Barrel & Pistol Gas System Kit

BROWNELLS - 10.5 300 BLACKOUT BARREL & PISTOL GAS SYSTEM KIT
  • Weight: unknown
  • Materials: 4150V steel, Nitride
  • Components: Barrel, gas tube, roll pin, gas block
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The Brownells 10.5” 300 Blackout Gas System Kit is a great kit that establishes accuracy and reliability for your 300 Blackout pistol or pistol-length rifle. The 10.5 inch length is shorter, providing you an option that is all-inclusive for a barrel and gas system for SBR and pistol use. It’s also finished in a matte black Nitride that is pretty much iron-clad resistant to corrosion or other damages, including nicks and scratches.

The 1:8 twist of the barrel gives you perfect accuracy and velocity for 300 Blackout rounds, including stability of subsonic rounds. The gas system is built with a low profile gas block and a tube that’s finished in the same durable nitride. Setscrews allow you to mount everything securely, whether you’re using a clamp on or slip on setup. The system also includes a standard roll pin for convenience.

Who Should Buy a Brownells 10.5” 300 Blackout Gas System Kit?

The Brownells 10.5” 300 Blackout Gas System Kit is perfect for anyone who wants the convenience of a barrel and gas system all in one for use with subsonic 300 Blackout rounds. It’s also meant for those in areas that are not restricted in use of short barreled rifles.

Pros

  • Highly accurate for long term firing
  • Simple installation
  • Works incredibly well with subsonic 300 Blackout rounds

Cons

  • Prohibited by gun laws in some jurisdictions

5. Brownells 16” 300 Blackout Barrel & Carbine Gas System Kit

BROWNELLS - 16 300 BLACKOUT BARREL & CARBINE GAS SYSTEM KIT
  • Weight: unknown
  • Materials: 4150V steel, Nitride
  • Components: Barrel, gas tube, roll pin, gas block
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The Brownells 16” 300 Blackout Barrel & Carbine Gas System Kit is configured much like the 10.5 inch version but is more widely compatible with longer firearms, which also helps it adhere to the more stringent gun laws in some areas of the country that restrict the use of short barrel rifles. This complete system includes a 16-inch barrel and a carbine length gas system, so you can easily fit it to customize your 300 Blackout rifle.

You get a preferred barrel twist ratio of 1:8 for optimal performance of both supersonic and subsonic 300 Blackout rounds, along with easy installation whether using clamp on or slip on systems. Great for hunting small game and varmint, as well as for target practice, this setup includes all the components of your gas system, as well as a barrel, all protected by a Nitride finish that won’t allow corrosion and helps avoid other damages likely to become a problem. You get excellent accuracy from the setup, and while the price is a little high, it can still save you money over purchasing the components separately.

Who Should Buy a Brownells 16” 300 Blackout Barrel & Carbine Gas System Kit?

The Brownells 16” 300 Blackout Barrel & Carbine Gas System Kit is ideal for anyone looking to customize their AR rifle for 300 Blackout rounds and use it with subsonic or supersonic ammo. It’s also perfect to help you make sure you’re adhering to and complying with local regulations on the length of your rifle.

Pros

  • Swift and easy installation
  • Perfect for coyote and varmint hunting
  • Delivers premium accuracy

Cons

  • On the high side in terms of price

6. Odin Works Medium Profile Barrel with Turntable Gas Block

ODIN WORKS INC. - 300 BLACKOUT MEDIUM PROFILE BARREL WITH TUNABLE GAS BLOCK
  • Weight: 10.7 ounces (16-in barrel, full assembly)
  • Materials: stainless steel
  • Components: Barrel, Gas Block, Gas Tube, roll pin
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The Odin Works Medium Profile Barrel with Turntable Gas Block offers you an opportunity to grab several components to customize your AR rifle setup in one package so you aren’t shopping around and spending a great deal of money on parts and pieces. This setup includes a barrel as well as a gas system, so that you have all your parts together and can assure a proper fit. For those who have legal options for it, there is a pistol length gas system available, as well as a carbine length system.

Both are optimal for use with 300 Blackout rounds with a suppressor, and both are tunable so you can manually adjust your gas flow for performance with the ammunition of your choice. The barrels are made of stainless steel for high quality, long term performance, with a muzzle thread that is compatible with the majority of muzzles and suppressors on the market today. The medium profile barrel is lightweight, so you don’t add unnecessary pounds to your rifle setup.

Who Should Buy an Odin Works Medium Profile Barrel with Turntable Gas Block?

The Odin Works Medium Profile Barrel with Turntable Gas Block is perfect for those with either a pistol length setup or a full length rifle setup in need of trustworthy parts who want to customize without spending all their time picking out the right parts and pieces to fit together. It’s best for those who don’t mind spending just a little more for top quality accessories.

Pros

  • Tunable gas flow for preferred ammunition
  • Multiple lengths for pistols and rifles
  • Highly durable

Cons

  • A bit high in cost

7. Primary Weapons MK109 Pro Upper Receiver

PRIMARY WEAPONS - MK109 PRO UPPER RECEIVER COMPLETE 300 BLACKOUT
  • Weight: 3 pounds, 10 ounces (complete upper receiver)
  • Materials: stainless steel
  • Components: receiver, BCG, barrel, charging handle, hand guard, complete adjustable gas system
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The Primary Weapons MK109 Pro Upper Receiver offers a cost-effective solution with all the components necessary to customize your AR style rifle with unique offerings and the perfect precision for your 300 Blackout firearm. This upper receiver chamber, like all those so beloved in the line by Primary Weapons, includes their unique long stroke system, as well as several other things that make this a top notch buy.

With a complete setup, you get a bolt carrier group, a 9.75 inch barrel, the Radiant Weapons Raptor charging handle, a free float M-LOK hand guard, and most importantly, and adjustable gas system that can be tweaked for use with your favorite ammunition. The short barrel has a 1:8 twist ratio, which is ideal for 300 Blackout subsonic rounds but also works well with supersonic rounds. You have a flash hider incorporated into the setup, and you’ll find the entire system achieves excellence in accuracy.

Who Should Buy a Primary Weapons MK109 Pro Upper Receiver?

The Primary Weapons MK109 Pro Upper Receiver is for those looking for a complete solution that includes both an adjustable gas system as well as all the other components you’ll need for quick customization of your AR style 300 Blackout firearm. It’s perfect if you’re trying to cut down on the amount of time you spend shopping for components for your rifle.

Pros

  • Complete upper receiver, not just a gas system
  • Long stroke system
  • Built for accuracy & durability

Cons

  • Complete system may not be required for your purposes

8. Bravo Company AR-15 Enhanced Fluted Barrel

BRAVO COMPANY - AR-15 ENHANCED BARREL 300 BLACKOUT 9IN FLUTED
  • Weight: 1 pound, 6 ounces (including barrel)
  • Materials: stainless steel, chrome, magnesium phosphate
  • Components: Barrel, complete gas system
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The Bravo Company AR-15 Enhanced Fluted Barrel offers you the opportunity to customize your rifle for 300 Blackout rounds without having to shop for multiple components. It comes not only with your gas system but also with a barrel that is fluted, lightweight, and well balanced, which offers you greater performance with 300 Blackout rounds. The fluting of the barrel is to the rear of the gas block, which allows for more appropriate gas dispersal, which helps control heat levels and accuracy of different rounds.

The gas system is pistol length, so you’ll want to check your local, regional, and state gun regulations to assure that it’s legal to use short barrel rifles in your area. If so, you’re in luck. The barrel is designed mainly for a carbine buffer with subsonic ammunition, or for an H3 buffer with higher velocity ammo. The bore chamber is chrome lined for smoothness of operation and corrosion resistance.

Who Should Buy a Bravo Company AR-15 Enhanced Fluted Barrel?

The Bravo Company AR-15 Enhanced Fluted Barrel works best for those who want to customize their 300 Blackout rifle with a pistol length gas system that can work well with both subsonic and supersonic rounds, based on the buffer you pair with it.

Pros

  • Fluted for excellent heat dispersal
  • Lightweight
  • Easily installed and interchangeable

Cons

  • Complete barrel system may not be necessary for your firearm

9. Wilson Combat AR-15 Ranger Barrel

WILSON COMBAT - AR-15 RANGER BARREL 300 BLACKOUT
  • Weight: 1 pound, 10 ounces (including barrel)
  • Materials: matte bead blasted 416R stainless steel
  • Components: Barrel, complete gas system
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The Wilson Combat AR-15 Ranger Barrel was created specifically for field use and is an excellent choice for hunters who want something easy to pack away. It’s a great piece to customize your AR setup for lightweight carry and great accuracy, anywhere that pistol length rifles are acceptable according to local and state gun laws. Making the switch is easier than installing just a gas system, since this complete component has the barrel that mounts right to your existing AR to lighten the load.

It also helps customize your firearm for ideal performance utilizing subsonic 300 Blackout rounds. It has M4 style feed ramps and a threaded muzzle that accepts almost any common accessory, including muzzles and suppressors. The slim profile makes it easier to pack, and the 416R stainless steel keeps it durable and well-constructed for longevity of service.

Who Should Buy a Wilson Combat AR-15 Ranger Barrel?

The Wilson Combat AR-15 Ranger Barrel is ideal for hunters in the field who want something lighter weight that incorporates both a gas system and a barrel for easy assembly and customization for a pistol length system that works best with subsonic rounds.

Pros

  • Slim, lightweight profile
  • Excellent pistol length system
  • Highly durable and long lasting

Cons

  • Not equipped as a rifle length gas system

10. Radical Firearms AR-15 Upper Receiver Assembly

RADICAL FIREARMS - AR-15 UPPER RECEIVER ASSEMBLY 300 BLACKOUT 16
  • Weight: unknown
  • Materials: 4150V chrome moly steel, melonited
  • Components: Upper receiver, barrel nut, handguard, gas system
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The Radical Firearms AR-15 Upper Receiver Assembly was constructed for easy drop in assembly, as well as great mil spec crafting and law enforcement grade quality. This complete upper receiver includes a pistol length gas system, which means you’ll have to check with gun regulations in your area to assure you can use short barrel rifles. In the case this is acceptable, you can’t go wrong with this setup.

The full assembly comes whole and ready for use with any lower receiver, and it includes the forged upper receiver as well as a forward assist, an ejection port door, and a barrel nut. It also incorporates a Radical Firearm’s FGS Free Float handguard, as well as a flash hider for your convenience.

Who Should Buy a Radical Firearms AR-15 Upper Receiver Assembly?

The Radical Firearms AR-15 Upper Receiver Assembly is great for anyone looking for a more complete and affordable solution, so you don’t have to seek out separate receiver and gas system. It’s also good for those who do want to customize a little further, since it doesn’t include a BCG or other components.

Pros

  • Law enforcement grade upper receiver
  • Easily customizable
  • Offers excellent accuracy

Cons

  • Includes upper receiver but not BCG or charger handle

Conclusion

PRIMARY WEAPONS - MK109 PRO UPPER RECEIVER COMPLETE 300 BLACKOUT

There are several ways to meet your needs for a gas system for your 300 Blackout rifle, whether you’re looking for a pistol length or carbine length gas system. You can purchase individual pieces of the system, a gas system by itself, or a system incorporated into an entire customization block that includes a barrel, receiver, or other elements that will help upgrade your firearm as you desire.

Many gas systems are adjustable so you can use them with multiple rounds, and several of them are optimized for subsonic 300 Blackout rounds, while others are versatile between subsonic and supersonic. Make sure you check with gun laws in your area prior to deciding on a gas system and consider your purpose and budget before choosing what to buy.

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