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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PWS MK116 MOD 2-M UPR 16 762X39 BLK
Primary Weapons Systems
MSRP: $1,399.95$1,300.00The PWS MK1 MOD 2-M line, revamped for 2018, features the PWS long stroke piston system. While the internals remain the same as other PWS lines, the MK1 MOD 2-M offers a variety of features exclusive to this line. Starting with patent pending PicLok...MSRP: $1,399.95$1,300.00 -
PWS MK116 MOD 2-M UPPER 16.1 BLK
Primary Weapons Systems
MSRP: $1,399.95$1,300.00The PWS MK1 MOD 2-M line features the PWS long stroke piston system. While the internals remain the same as other PWS lines, the MK1 MOD 2-M offers a variety of features exclusive to this line. Starting with patent pending PicLok technology on the free...MSRP: $1,399.95$1,300.00 -
HK UPPER MR556A4 5.56 16.5 BLK
HK
MSRP: $2,499.00$1,888.00The 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: $2,499.00$1,888.00 -
GE URG-I NC 556NATO 14.5 BLK/DDC
Geissele Automatics
$1,479.00For more than 50 years the famed silhouette of the M16/M4 has only had one major and several minor changes. Barrel lengths and buttstocks have changed, but more or less the evolution of America's right arm has proceeded apace with each generation of...$1,479.00 -
GE SUPER DTY MOD1 5.56 13.9 URG DDC
Geissele Automatics
$1,439.00Manufactured 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...$1,439.00 -
GE SUPER DTY MOD1 5.56 14.5 URG DDC
Geissele Automatics
$1,439.00Manufactured 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...$1,439.00 -
GE SUPER DUTY MOD1 5.56 16 URG DDC
Geissele Automatics
$1,439.00Manufactured 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...$1,439.00 -
GE SUPER DUTY MOD1 5.56 16 URG BLK
Geissele Automatics
$1,286.00Manufactured 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...$1,286.00 -
DD M4A1 FSP UPR RCVR 14.5 PW 556 FDE
Daniel Defense
MSRP: $1,619.00$1,506.00This Daniel Defense M4A1 FSP AR15 style Upper Receiver Group was built for customers wanting a firearm inspired by USSOCOM SOPMOD Block II. This upper features the M4A1 FSP RIS II picatinny quad rail in Flat Dark Earth, a 14.5" M4 profile barrel,...MSRP: $1,619.00$1,506.00 -
DD M4A1 UPPER URG 14.5 PB 556 FDE
Daniel Defense
MSRP: $1,612.00$1,499.00The Daniel Defense M4A1 Upper Receiver Group features the M4A1 Rail Interface System (RIS II), which has been in use by US Special Operations Command (SOCOM) for the SOPMOD II Weapons System since 2005. This two-piece, free-floating rail system allows...MSRP: $1,612.00$1,499.00 -
RADIAN BUILDER KIT 10 OD GREEN
Radian Weapons
MSRP: $1,418.09$1,255.00The 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...MSRP: $1,418.09$1,255.00 -
RADIAN BUILDER KIT 10 BLACK
Radian Weapons
MSRP: $1,418.09$1,255.00The 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...MSRP: $1,418.09$1,255.00