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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RADIAN UPPER 9 300 BLK BLACK
Radian Weapons
MSRP: $2,067.84$1,829.95The 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...MSRP: $2,067.84$1,829.95 -
RADIAN UPPER 10.5 223 WYLDE BLACK
Radian Weapons
MSRP: $2,152.59$1,904.95The 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...MSRP: $2,152.59$1,904.95 -
Out of stock
HK UPPER MR556A4 5.56 11 BLK
Heckler & Koch
MSRP: $2,462.27$2,179.00The MR556 upper receiver kit has been updated to include all the new A4 features, including new barrel profile, adjustable gas block, handguard and more. This kit includes a complete upper receiver/barrel assembly, allowing Mil-Spec 5.56mm AR-style...MSRP: $2,462.27$2,179.00 -
GE URG-I NC 556NATO 11.5 BLK/DDC
Geissele Automatics
MSRP: $1,671.27$1,479.00With the advent of the USASOC URGI, that quintessentially American silhouette has changed forever. The Geissele Super Modular Rail MK 16 handguard, hammer forged barrel, and carbine gas system work in concert for a package that delivers measurable...MSRP: $1,671.27$1,479.00 -
GE URG-I NC 556NATO 10.3 BLK/DDC
Geissele Automatics
MSRP: $1,671.27$1,479.00With the advent of the USASOC URGI, that quintessentially American silhouette has changed forever. The Geissele Super Modular Rail MK 16 handguard, hammer forged barrel, and carbine gas system work in concert for a package that delivers measurable...MSRP: $1,671.27$1,479.00 -
GE SUPER DUTY MOD1 5.56 12.5 URG DDC
Geissele Automatics
MSRP: $1,625.17$1,438.20Manufactured with confidence and without compromise, the Super Duty MOD1 adds value to the platform while continuing the reputation for excellence. All of these technologies and advancements combine to bring to market a true next-gen upper for the AR-15...MSRP: $1,625.17$1,438.20 -
GE SUPER DUTY MOD1 5.56 10.3 URG DDC
Geissele Automatics
MSRP: $1,625.17$1,438.20Manufactured with confidence and without compromise, the Super Duty MOD1 adds value to the platform while continuing the reputation for excellence. All of these technologies and advancements combine to bring to market a true next-gen upper for the AR-15...MSRP: $1,625.17$1,438.20 -
GE SUPER DUTY MOD1 5.56 11.5 URG DDC
Geissele Automatics
MSRP: $1,625.17$1,438.20Manufactured with confidence and without compromise, the Super Duty MOD1 adds value to the platform while continuing the reputation for excellence. All of these technologies and advancements combine to bring to market a true next-gen upper for the AR-15...MSRP: $1,625.17$1,438.20 -
FN BBL ASSEMBLY SCAR 17S 13
FN America
MSRP: $1,693.87$1,499.00The FN SCAR barrel assemblies are cold hammer-forged, chrome-lined MIL-SPEC steel barrels with front sight assembly, gas block assembly, gas regulator, gas piston and flash hider installed. Available in short lengths for reduced weight, fast handling and...MSRP: $1,693.87$1,499.00 -
DD MK18 URG UPPER 556 10.3 MK18 FDE
Daniel Defense
MSRP: $1,595.56$1,412.00Use what THEY use. The Daniel Defense MK18 Upper Receiver Group features the railed forend Daniel Defense currently provides to USSOCOM and a 10.3" Cold Hammer Forged Barrel. The MK18 Rail Interface System (RIS II) features the Bolt-Up System has been...MSRP: $1,595.56$1,412.00 -
DD URG DD4 RIIIS 11.5 5.56 BLK/FDE
Daniel Defense
MSRP: $1,595.56$1,412.00The DD4 RIIIS AR15 style Upper Receiver Group is built around a 11.5 inch Cold Hammer Forged Government Profile barrel with a Daniel Defense Flash Suppressor, a GRIP-N-RIP Charging Handle, and their carbine length gas system. It features a 10.5 inch...MSRP: $1,595.56$1,412.00 -
DD M4 UPPER 300BLK 10.3 BLKT UPPER
Daniel Defense
MSRP: $1,526.63$1,351.00High quality components and precise manufacturing makes Daniel Defense Products ideal for both new shooters and experienced gun owners. The durability, reliability and excellent build quality will provide years of service you can count on.MANUFACTURER:...MSRP: $1,526.63$1,351.00