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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Out of stock
RRA CMPLT MID A4 UPR 450BM 16 5RD
Rock River Arms
MSRP: $750.00$698.21Rock River Arms A4 mid-length upper comes chambered in .450 Bushmaster with a 16" chrome moly 1/24 twist barrel. Additionally this upper includes a RRA 13" M-Lok compatible lightweight free float rail and a RRA Operator Brake (5/8-32 thread). This is a...MSRP: $750.00$698.21 -
RRA CMPLT CAR A4 UPR 350LGD 16 10RD
Rock River Arms
MSRP: $740.00$684.53Rock River Arms A4 Carbine upper comes chambered in .350 Legend with a 16" chrome moly 1/16 twist barrel. Additionally this upper includes a RRA 13" M-Lok compatible lightweight free float rail and a RRA Operator Brake (1/2-36 thread). This is a complete...MSRP: $740.00$684.53 -
Out of stock
RRA CMPTL RRAGE 3G UPR 5.56NATO 16
Rock River Arms
MSRP: $540.00$499.70Rock River Arms RRAGE 3G A4 carbine upper comes chambered in 5.56mm NATO. This extruded aluminum upper receiver comes with a port door and no forward assist. Additionally, this upper is equipped with a RRA 15" RRAGE 3G M-Lok compatible handguard, a 16"...MSRP: $540.00$499.70 -
RRA CMP COYOTE CAR A4 UPR 300BLK 16
Rock River Arms
MSRP: $820.00$759.82Rock River Arms A4 Coyote Carbine upper comes chambered in .300 AAC / Blackout with a 16" chrome moly 1/8twist barrel. Additionally this upper includes a RRA 12.5" M-Lok compatible lightweight free float rail and a Smith Vortex flash hider (5/8-24...MSRP: $820.00$759.82 -
RISE CMPLT UPPR 6MM ARC 18 PAT BRN
Rise Armament
MSRP: $1,199.00$999.00The RISE 6mm ARC AR-15 Upper Receivers features an exceptionally accurate 18-inch 416R stainless steel threaded barrel.MANUFACTURER: Rise ArmamentMPN: RA-6ARC-CU-BRN-18MODEL: 0Type of Barrel: 01:07:00Barrel Length: 18"Description: M-LOKFinish:...MSRP: $1,199.00$999.00 -
RISE CMPLT UPPR 6MM ARC 18 BLACK
Rise Armament
MSRP: $1,199.00$999.00The RISE 6mm ARC AR-15 Upper Receivers features an exceptionally accurate 18-inch 416R stainless steel threaded barrel.MANUFACTURER: Rise ArmamentMPN: RA-6ARC-CU-BLK-18MODEL: 0Type of Barrel: 01:07:00Barrel Length: 18"Description: M-LOKFinish:...MSRP: $1,199.00$999.00 -
RISE CMPLT UPPR 22 ARC 18 PAT BRN
Rise Armament
MSRP: $1,199.00$999.00The RISE 22 ARC AR-15 Upper Receivers features an exceptionally accurate 18-inch 416R stainless steel threaded barrel.MANUFACTURER: Rise ArmamentMPN: RA-22ARC-CU-BRN-18MODEL: 0Type of Barrel: 01:07:00Barrel Length: 18"Description: M-LOKFinish:...MSRP: $1,199.00$999.00 -
RISE CMPLT UPPR 22 ARC 18 BLACK
Rise Armament
MSRP: $1,199.00$999.00The RISE 22 ARC AR-15 Upper Receivers features an exceptionally accurate 18-inch 416R stainless steel threaded barrel.MANUFACTURER: Rise ArmamentMPN: RA-22ARC-CU-BLK-18MODEL: 0Type of Barrel: 01:07:00Barrel Length: 18"Description: M-LOKFinish:...MSRP: $1,199.00$999.00 -
RADICAL UPPR 762X39 16 1-10 MLOK BL
Radical Firearms
MSRP: $474.95$433.97The Radical Firearms 7.62X39 upper is perfect for the novice or advanced shooter wanting to finish out that build and hit the range. No matter what your style of shooting is, Radical Firearms has you covered.MANUFACTURER: Radical FirearmsMPN:...MSRP: $474.95$433.97 -
RADICAL UPPR 300BLK 16 1-8 MLOK BLK
Radical Firearms
MSRP: $474.95$308.40The Radical Firearms 300 Blackout upper is a complete MIL-STD upper ready to drop on any MIL-STD lower Receiver. Perfect for the novice or advanced shooter wanting to finish out that build and hit the range. No matter what your style of shooting is,...MSRP: $474.95$308.40 -
PWS MK116 MOD 1-M UPPER 16.1 BLK
Primary Weapons Systems
MSRP: $1,129.95$1,049.95The MK1 MOD 1-M line features the PWS long stroke piston system. Internally, this line offers the tried and true system that PWS owners have grown to know and love. Featuring a free-float MLOK handguard, forward assist controls, and a more true to...MSRP: $1,129.95$1,049.95 -
NORDIC 16 .22LR COMPLETE UPPER 10RD
Nordic Components
MSRP: $610.00$549.00Nordic Components' 22RB dedicated 22 upper receiver converts your standard AR-pattern lower to a dedicated .22LR for recreational shooting, training, and hunting. The 22RB is manufactured using the same materials as most standard AR15 rifles, ensuring...MSRP: $610.00$549.00