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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 5.56 w/ 12" FTR Keymod Rail
16" Radical Firearms 5.56 w/ 12" FTR Keymod Rail
Our Price: $299.00
Sale Price: $229.00
Savings: $70.00
In Stock

The Radical Firearms 16” 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. Finish the build with your favorite lower receiver, charging handle, bolt carrier group, and sights then head for the range!

Includes the Radical Firearms First-Gen Thin Rail System, an ultralight and slim free float handguard for the AR-15. Features large cooling holes, multiple sling attachment locations, and a suppressor friendly internal diameter. Reversed KeyMod slots allow for superior mounting strength compared to traditional KeyMod cuts.

Features:
  • 16" 41V50 chrome moly vanadium steel M4 contour barrel
  • Chambered in 5.56 NATO with 1:7 twist rate
  • 1/2x28 A2 flash hider
  • 12" free float Radical Firearms FTR rail
  • Made in the U.S.A. in Stafford, Texas!

NOTE: This barreled upper does not include a bolt carrier group or charging handle.
7.5" Radical Firearms 5.56 w/ 7" M-LOK FCR Rail
7.5" Radical Firearms 5.56 w/ 7" M-LOK FCR Rail
Our Price: $279.00
Sale Price: $239.00
Savings: $40.00
(Out of 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
10.5" Radical Firearms .300 w/ 10" M-LOK FCR Rail
Our Price: $279.00
Sale Price: $249.00
Savings: $30.00
(Out of 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
10.5" Radical Firearms 5.56 w/ 10" M-LOK FCR Rail
Our Price: $279.00
Sale Price: $249.00
Savings: $30.00
(Out of 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
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
7.5" Bear Creek Arsenal 5.56 M4 Complete Upper with 7" M-LOK Rail
7.5" Bear Creek Arsenal 5.56 M4 Complete Upper with 7" M-LOK Rail
Our Price: $375.00
Sale Price: $349.00
Savings: $26.00
In Stock

This Bear Creek Arsenal complete upper receiver, like all of Bear Creek's products, is fully designed and made in the United States of America. This allows Bear Creek to put every upper through numerous QA/QC checks, including test firing prior to approval and shipment. Thanks to this rigorous testing, this complete upper is backed by Bear Creek Arsenal's limited lifetime warranty!

This 7.5" complete upper is chambered for 5.56 NATO and features Bear Creek's exceptional 41V50 Chrome Molt Vanadium steel barrel with a reliable pistol length gas system. The 1:7 twist will ensure even the heaviest 5.56 rounds will stabilize, perfect for use with popular 77-grain OTMs. Both the barrel and M16-cut bolt carrier group have a durable parkerized finish. The high quality bolt carrier group has been high-pressure tested and magnetic particle inspected so you can be 100% assured of no material defects!

This complete upper has been topped off with a 7" free float M-LOK handguard, improving airflow and accuracy while reducing weight and providing plenty of space for your favorite accessories!

Features:
  • 7.5" 41V50 Chrome Moly Vanadium Steel barrel with M4 contour, Pistol gas system, and Parkerized finish.
  • 1/2x28 Thread Pitch with a 1:7 Twist Rate
  • Parkerized M16 cut Bolt Carrier Group is high pressure tested and magnetic particle inspected.
  • Ships with A2 Flash Hider
  • 7" free float M-LOK rail
  • Made in Sanford, North Carolina.

Bear Creek Arsenal DOES NOT recommend using steel cased ammo.

Please Note: This upper assembly has a barrel less than 16" in length. These uppers are only for use on AR-15 pistol lowers and legal Short-Barreled Rifles. Other configurations may violate Federal law.