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.223 / 5.56 .300
7.62 x 39

Shop Firearms Barrel Assembly

Your firearms’ barrelled upper assembly is a crucial component of you rifle or custom build. Whether you are building an AR Pistol or and AR Rifle, we have the upper receiver you are looking for. We offer upper receivers in 7.5", 10.5", 16", 18", and 20". Most of our rifles are equipped with free float rail systems to maintain accuracy while reducing the profile and weight of the upper receiver. We build some uppers in house and also act a distributor for other companies such as Radical Firearms, Troy Industries, Anderson Manufacturing, Aero Precision, Bravo Company, Stag Arms, etc. We offer uppers in 5.56, .223, .300 blackout, 7.62x39, .458 socom, etc. If you don't see the one you like, pick up the phone and call us! We will be happy to place a custom order or build you one!

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16" Radical Firearms Upper 556 w/12" M-LOK Rail
Our Price: $279.00
Sale Price: $225.00
Savings: $54.00
In Stock

* 16" 4150 Chrome Moly Vanadium Steel Barrel
* M4 Profile Melonite Finish
* 12" RF M-LOK FCR Free Float Rail
* Carbine Length Gas System
* 1/7 Twist
* A2 Flash Hider

7.5" Radical Firearms 5.56 w/ 7" M-LOK FCR Rail
Our Price: $279.00
Sale Price: $239.00
Savings: $40.00
In Stock


NOTE: This upper assembly has a barrel less than 16” in length. These uppers are intended for use in AR-15 pistols or legal short-barreled rifles. Other configurations may violate Federal law.


Does not include bolt carrier group or charging handle.


The Radical Firearms 7.5" 5.56 NATO M4 Barreled Upper Receiver is a law enforcement grade, drop-in solution for your next AR build. Crafted with quality materials and covered by Radical’s lifetime warranty, this MIL-SPEC upper receiver provides an outstanding solution for any budget. Arrives at your door with the hard work done. Complete this build with your favorite lower receiver, bolt carrier group, charging handle, and sights, then head for the range!

The Radical Firearms FCR system is a slim handguard that provides the weight savings you want without sacrificing any of the mounting possibilities you require. This freefloat design offers a monolithic Picatinny rail and plenty of M-LOK attachment points for all your gear.



10.5" Radical Firearms .300 w/ 10" M-LOK FCR Rail
Our Price: $279.00
Sale Price: $249.00
Savings: $30.00
In Stock

Barrel - Contour HBAR
Barrel Coating - Salt Bath Nitride

Barrel Length - 10.5” 1/8 Twist

Barrel Lining - Salt Bath Nitride

Barrel Material - 41V50 Chrome Moly Vanadium Steel

Brand - Radical Firearms

Caliber Gauge - .300

Gas System Length - Pistol

Gas System Type - Direct Impingement

Handguard - 10 Radical M-LOK FCR Rail

Muzzle Device - A2 Flash Hider

Thread Pattern - 5/8-24

10.5" Radical Firearms 5.56 w/ 10" M-LOK FCR Rail
Our Price: $279.00
Sale Price: $249.00
Savings: $30.00
In Stock

NOTE: This upper assembly has a barrel less than 16” in length. These uppers are intended for use in AR-15 pistols or legal short-barreled rifles. Other configurations may violate Federal law.


Does not include bolt carrier group or charging handle.

The Radical Firearms 10.5" 5.56 NATO M4 Barreled Upper Receiver is a law enforcement grade, drop-in solution for your next AR build. Crafted with quality materials and covered by Radical’s lifetime warranty, this MIL-SPEC upper receiver provides an outstanding solution for any budget. Arrives at your door with the hard work done. Complete this build with your favorite lower receiver, bolt carrier group, charging handle, and sights, then head for the range!

The Radical Firearms FCR system is a slim handguard that provides the weight savings you want without sacrificing any of the mounting possibilities you require. This freefloat design offers a monolithic Picatinny rail and plenty of M-LOK attachment points for all your gear.

16" Radical Firearms 300 Blackout w/ 15" M-LOK FCR Rail
Our Price: $279.00
Sale Price: $249.00
Savings: $30.00
In Stock

Barrel CoatingSalt Bath Nitride
Barrel ContourHBAR
Barrel Length16
Barrel LiningSalt Bath Nitride
Barrel Material41V50 Chrome Moly Vanadium Steel
BrandRadical Firearms
Caliber Gauge300 BLK
Gas System LengthPistol
Gas System TypeDirect Impingement
Handguard15 Radical M-LOK FCR Rail
Muzzle DeviceA2 Flash Hider
Thread Pattern5/8 X 24
Twist Rate1:8
Troy Industries 16" 5.56 Upper w/ 13" M-LOK Rail and Flip Sights - BLK
Our Price: $529.99
In Stock

Troy Industries Complete Upper Receiver Group. This ready to go assembly is completely manufactured and assembled by Troy Industries. Features include 5.56NATO chamber, a 1:7 twist rate, AR-15 cut bolt carrier group, Medieval Flash Suppressor, a set of front and rear Troy folding sights and the NEW Troy Industries M-LOK 13" handguard.