AR15 Parts
Gas & Brass Armory is your trusted source for AR-15 parts in Brandon, FL. Whether you're upgrading your current rifle or building a custom AR from the ground up, we stock high-quality components from top manufacturers like Aero Precision, Magpul, Radian Weapons, BCM, Geissele, and more. Shop complete uppers, stripped lowers, triggers, handguards, buffer kits, barrels, and everything you need for your next AR build. Our expert staff is here to help you build it right the first time.
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FAXON ION ULTRALT 16 556NATO UPPER
Faxon Firearms
MSRP: $1,099.00$947.89The FX5500-U features Faxon's 14.5" Pencil Barrel with Integral Slim 3-Port Muzzle Brake which meets the NFA 16" minimum barrel length requirement, 13" Streamline Carbon Fiber Handguard, and Lightweight Bolt Carrier Group. Super light, easy shooting and...MSRP: $1,099.00$947.89 -
FAXON ARAK-21 7.62X39 16 UPPER
Faxon Firearms
MSRP: $999.00$919.08The ARAK-21 is a gas piston actuated, complete upper receiver assembly designed to seamlessly interface with the standard AR-15 platform. The total extent of the interface is simply the take down pin, and the pivot pin. The new ARAK-21 upper receiver...MSRP: $999.00$919.08 -
FAXON ARAK-21 556NATO 16 UPPER
Faxon Firearms
MSRP: $999.00$919.08The ARAK-21 is a gas piston actuated, complete upper receiver assembly designed to seamlessly interface with the standard AR-15 platform. The total extent of the interface is simply the take down pin, and the pivot pin. The new ARAK-21 upper receiver...MSRP: $999.00$919.08 -
DD M4A1 FSP UPR RCVR 14.5 PW 556 FDE
Daniel Defense
MSRP: $1,619.00$1,506.00This Daniel Defense M4A1 FSP AR15 style Upper Receiver Group was built for customers wanting a firearm inspired by USSOCOM SOPMOD Block II. This upper features the M4A1 FSP RIS II picatinny quad rail in Flat Dark Earth, a 14.5" M4 profile barrel,...MSRP: $1,619.00$1,506.00 -
DD M4V7 LW UPPER 556 16 MLOK BLK
Daniel Defense
MSRP: $1,300.00$1,208.00The Daniel Defense M4 V7 LW Upper Receiver Group is built around a Cold Hammer Forged 16" Lightweight profile barrel-which is two ounces less than a standard V7 barrel-and equipped with a DD improved Flash Suppressor to reduce flash signature. It...MSRP: $1,300.00$1,208.00 -
DD M4V7 UPPER 556 16 MLOK BLK
Daniel Defense
MSRP: $1,300.00$1,208.00The Daniel Defense M4 V7 Upper Receiver Group is built around a Cold Hammer Forged 16" Government profile barrel and equipped with a DD improved Flash Suppressor to reduce flash signature. It features a mid-length gas system for smooth, reliable cycling...MSRP: $1,300.00$1,208.00 -
DD M4A1 UPPER URG 14.5 PB 556 FDE
Daniel Defense
MSRP: $1,612.00$1,499.00The Daniel Defense M4A1 Upper Receiver Group features the M4A1 Rail Interface System (RIS II), which has been in use by US Special Operations Command (SOCOM) for the SOPMOD II Weapons System since 2005. This two-piece, free-floating rail system allows...MSRP: $1,612.00$1,499.00 -
COLT EPR UPPER 5.56 16 MLOK BLK
Colt's Manufacturing
MSRP: $1,049.00$993.60The durability, reliability and excellent build quality of Colt uppers will provide years of service you can count on.MANUFACTURER: Colt's ManufacturingMPN: LE6920EPR-CKMODEL: 0Barrel Length: 16"Description: M-LOKFinish: MatteCaliber: 223 RemingtonType:...MSRP: $1,049.00$993.60 -
CMMG UPPR RSLT MK4 6MM ARC 16.1 BLK
CMMG
MSRP: $899.95$784.74Meet CMMG's newest long-range offering. Chambered in Hornady's new 6mm ARC (Advanced Rifle Cartridge), the CMMG's RESOLUTE upper receiver group allows you to pair this exciting caliber with your existing AR15 lower for superior function and accuracy at...MSRP: $899.95$784.74 -
CMMG UPPR RSLT MK4 350LEG 16.1 BLK
CMMG
MSRP: $899.95$784.74CMMG's RESOLUTE lineup is engineered with purpose for those who refuse to compromise on quality. Each RESOLUTE rifle comes with a 16-inch barrel and is designed for balance, accuracy and maneuverability. Whether you're defending your family or looking to...MSRP: $899.95$784.74 -
BLACK RAIN UPPER 458SOCOM 16 BLK
Black Rain Ordnance
MSRP: $999.00$918.72Black Rain Ordnance, Inc. is a precision rearms manufacturer specializing in the modern sporting rifle design. Founded in 2009 with a benchmark to only manufacture weapons we would personally be proud to own and operate. They've sought out the best...MSRP: $999.00$918.72 -
BAD 16 UPPR WRKHORSE 556 AMBI C GRAY
Battle Arms Development
MSRP: $745.48$709.98The WORKHORSE complete upper receiver is purpose-built around the forged WORKHORSE 7075-T6 aircraft-grade aluminum receiver and free-float rail handguard with M-LOK attachment point at 3, 6, and 9 o'clock positions. At 12 o'clock is a full-length...MSRP: $745.48$709.98