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
CMMG BBL 5.7X28 10.4 PS90
CMMG
MSRP: $308.86$247.09Great choice for your PS90 SBR project. Pair this with a CMMG PS90 Flash hider or thread adapter to complete your SBR.MANUFACTURER: CMMGMPN: 57DF1C7MODEL: 0Type of Barrel: 01:09:00Barrel Length: 10.4"Fit: FN PS90Caliber: 5.7X28MMType: BarrelColor: BlackMSRP: $308.86$247.09 -
CMMG BBL 300BLK 8 4140CM SBN
CMMG
MSRP: $198.28$141.50Perfect for building your custom AR15 upper group. Comes with properly installed M4 barrel extension. All barrel sub-assemblies are properly headspaced. ALL NFA RULES APPLYMANUFACTURER: CMMGMPN: 30D810AMODEL: 0Barrel Length: 8"Description: 4140CMFinish:...MSRP: $198.28$141.50 -
CMMG UPPR DSNT 5.7X28MM 6.5 CG
CMMG
MSRP: $1,169.54$1,034.99The 5.7x28mm personal defense cartridge has found home with the purposefully designed 6.5" DISSENT upper group, all you need is a Mk4/mil-spec AR15 lower receiver or CMMG Mk57 lower receiver. All DISSENT uppers include a lower receiver 1913 picatinny...MSRP: $1,169.54$1,034.99 -
CMMG BBL AND BCG KIT 8 5.7X28MM
CMMG
MSRP: $482.99$386.39The 8" 5.7x28mm Barrel and BCG Kit is perfect for building an AR pistol or SBR in 5.7x28mm using CMMG's patented Radial Delayed Blowback operating system. Unlike typical direct blowback systems, Radial Delayed Blowback not only reduces the weight in your...MSRP: $482.99$386.39 -
CMMG BBL AND BCG KIT 5 5.7X28MM
CMMG
MSRP: $476.69$381.35The 5" 5.7x28mm Barrel and BCG Kit is perfect for building an AR pistol or SBR in 5.7x28mm using CMMG's patented Radial Delayed Blowback operating system. Unlike typical direct blowback systems, Radial Delayed Blowback not only reduces the weight in your...MSRP: $476.69$381.35 -
BAD 10.5 UPPR WRKHORSE 556 AMBI GRAY
Battle Arms Development
MSRP: $816.48$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: $816.48$709.98 -
Out of stock
BAD 10.5 UPR WRKHORSE 556AMBI C BLK
Battle Arms Development
MSRP: $758.98$659.98The 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: $758.98$659.98 -
BAD 10.5 UPPR WRKHORSE 556 AMBI BLK
Battle Arms Development
MSRP: $758.98$659.98The 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: $758.98$659.98 -
BAD 10.5 UPPR AUTH ELITE 556 C GRAY
Battle Arms Development
MSRP: $1,033.85$899.00The 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: $1,033.85$899.00 -
BAD 10.5 UPR AUTH ELITE 556AMBI GRAY
Battle Arms Development
MSRP: $1,033.85$899.00The 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: $1,033.85$899.00 -
BAD WORKHRSE 556 UPPR 10.5 BLK N/BCG
Battle Arms Development
MSRP: $624.99$499.99Established 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: $624.99$499.99 -
BALLISTIC BBL 86BLK 12 DRP PST PR B
Ballistic Advantage
MSRP: $308.75$247.00This 8.6 Blackout 12-inch barrel is machined from 416R Stainless Steel with a QPQ Corrosion-resistant finish. their Premium Black Series 8.6 Blackout Barrels are proof-fired and MPI-tested, ensuring the best quality and accuracy.MANUFACTURER: Ballistic...MSRP: $308.75$247.00