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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GE URG-I NC 556NATO 14.5 BLK/DDC
Geissele Automatics
$1,479.00For more than 50 years the famed silhouette of the M16/M4 has only had one major and several minor changes. Barrel lengths and buttstocks have changed, but more or less the evolution of America's right arm has proceeded apace with each generation of...$1,479.00 -
FIGHT MCR MIL DF UPR 556 PIC 16.25
FightLite
MSRP: $6,999.99$6,600.00The groundbreaking MCR (Mission Configurable Rifle) belt-fed upper receiver assembly is designed to interchange with standard AR/M4 type uppers and readily fits any MIL-Spec lower receiver without permanent modification to the host lower, and is rearward...MSRP: $6,999.99$6,600.00 -
FIGHT MCR DUAL FD UPR 556 MLOK 16.25
FightLite
MSRP: $6,399.99$5,900.00The groundbreaking MCR (Mission Configurable Rifle) belt-fed upper receiver assembly is designed to interchange with standard AR/M4 type uppers and readily fits any MIL-Spec lower receiver without permanent modification to the host lower, and is rearward...MSRP: $6,399.99$5,900.00 -
FIGHT MCR DUAL FD UPR 556 PIC 16.25
FightLite
MSRP: $6,399.99$5,900.00The groundbreaking MCR (Mission Configurable Rifle) belt-fed upper receiver assembly is designed to interchange with standard AR/M4 type uppers and readily fits any MIL-Spec lower receiver without permanent modification to the host lower, and is rearward...MSRP: $6,399.99$5,900.00 -
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 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 -
CMMG UPPR RSLT MK4 350LEG 16.1 BLK
CMMG
MSRP: $899.95$884.00CMMG'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$884.00 -
BLACK RAIN UPPER 458SOCOM 16 BLK
Black Rain Ordnance
MSRP: $999.00$919.00Black 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$919.00 -
BAD 16 UPPR WRKHORSE 556 AMBI C BLK
Battle Arms Development
MSRP: $692.98$660.00The 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: $692.98$660.00 -
BAD 16 UPPR WRKHORSE 556 AMBI BLK
Battle Arms Development
MSRP: $692.98$660.00The 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: $692.98$660.00 -
BAD 16 UPPR AUTH ELITE 556AMBI C BLK
Battle Arms Development
MSRP: $865.20$824.00The heart of the BAD Authority Elite upper receiver is the billet BAD556 7075-T6 aircraft grade aluminum receiver with integral ambidextrous controls and free-float rail handguard with M-LOK attachment points at 3, 6, and 9 o'clock positions. At 12...MSRP: $865.20$824.00 -
BAD WORKHORSE 556 UPPR 16 BLK N/BCG
Battle Arms Development
MSRP: $529.99$500.00Established in 2009, Battle Arms Development, Inc. (B.A.D. Inc.) stands as a distinguished force in the realm of small arms innovation. Nestled in the heart of Henderson, Nevada, their company is driven by a relentless commitment to pushing the...MSRP: $529.99$500.00