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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SPIKE S 556NATO M4 LE UPPER W/RAIL
Spike's Tactical
MSRP: $826.00$744.00Spikes complete upper assemblies will arrive to you inspected, tested, and ready to drop-in and go to work. Spikes maintains the same high standard of tolerances and attention to detail as the uppers they use for complete rifle builds. Every built upper...MSRP: $826.00$744.00 -
SPIKE S 556 UPPER 14.5 PB RAIL/DYN
Spike's Tactical
MSRP: $1,006.00$906.00Spikes complete upper assemblies will arrive to you inspected, tested, and ready to drop-in and go to work. Spikes maintains the same high standard of tolerances and attention to detail as the uppers they use for complete rifle builds. Every built upper...MSRP: $1,006.00$906.00 -
SOLGW E INDIA KIT V2 5.56 16 BLK
Sons of Liberty Gun Works
MSRP: $500.00$475.00The East India Starter Kit is a building block for any build you wish to do. Properly assembled with a USGI barrel nut, this is a great way to finish assembling your own upper without having to know how to install a barrel and gas block.MANUFACTURER:...MSRP: $500.00$475.00 -
SOLGW E INDIA KIT V2 5.56 13.7 BLK
Sons of Liberty Gun Works
MSRP: $500.00$475.00The East India Starter Kit is a building block for any build you wish to do. Properly assembled with a USGI barrel nut, this is a great way to finish assembling your own upper without having to know how to install a barrel and gas block.MANUFACTURER:...MSRP: $500.00$475.00 -
SOLGW L89 BS V2 5.56 13.7 HUX 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 -
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 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 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 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 -
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