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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SOLGW L89 BS V2 5.56 13.7 NOX BLK
Sons of Liberty Gun Works
MSRP: $1,375.00$1,307.00The L89BS (Broadsword) uppers include 7-sided L89 rails with Titanium barrel nuts and integral QD cups, BROADSWORD upper receivers, 4150CMV barrels, low profile gas blocks, and include the muzzle device. Bolt Carrier Groups and Charging Handles are NOT...MSRP: $1,375.00$1,307.00 -
SOLGW L89 V2 5.56 13.7 NOX BLK
Sons of Liberty Gun Works
MSRP: $1,000.00$950.00These L89 Upper Receiver Groups are built using SOLGW forged upper, V2 Button rifled barrels, their V2 4140 gas block, and offered in a variety of length and muzzle device options. BCH and Charging Handles are not included.MANUFACTURER: Sons of Liberty...MSRP: $1,000.00$950.00 -
SOLGW L89 V2 5.56 13.7 HUX BLK
Sons of Liberty Gun Works
MSRP: $1,000.00$950.00These L89 Upper Receiver Groups are built using SOLGW forged upper, V2 Button rifled barrels, their V2 4140 gas block, and offered in a variety of length and muzzle device options. BCH and Charging Handles are not included.MANUFACTURER: Sons of Liberty...MSRP: $1,000.00$950.00 -
RRA CMPLT MID A4 UPR 450BM 16 5RD
Rock River Arms
MSRP: $750.00$699.00Rock 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$699.00 -
RRA CMPTL RRAGE 3G UPR 5.56NATO 16
Rock River Arms
MSRP: $540.00$440.00Rock 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$440.00 -
RRA CMPLT CAR A4 UPR 458 SOCOM 16
Rock River Arms
MSRP: $790.00$733.00Rock River Arms complete Tactical Carbine upper is an A4 upper chambered in .458 SOCOM with a 16" chrome moly bull barrel and 1:14 twist. Additionally the upper comes with a complete bolt carrier group, charging handle assembly, 15" RRA lightweight M-Lok...MSRP: $790.00$733.00 -
RRA CMP COYOTE CAR A4 UPR 300BLK 16
Rock River Arms
MSRP: $820.00$760.00Rock 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$760.00 -
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 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$434.00The 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$434.00 -
RADIAN UPPER 17.5 223 WYLDE ODG
Radian Weapons
$2,070.00The design philosophy behind the Radian Model 1 is simple: use the highest quality raw materials, most precise CNC machining equipment, and best components available to create a weapon that seamlessly blends form and function. Beyond quality and...$2,070.00