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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GEISSELE 10 SUPER MOD MK4 FED DDC
Geissele Automatics
MSRP: $510.00$408.00This is the same rail used to fullfill contracts for the Federal Bureau of Investigation (FBI). It's strength, modularity and M-Lok compatibility gives users the capabilities needed to successfully complete the mission at hand.MANUFACTURER: Geissele...MSRP: $510.00$408.00 -
GEISSELE 10 SUPER MOD MK4 FED BLK
Geissele Automatics
MSRP: $478.13$382.50This is the same rail used to fulfill contracts for the Federal Bureau of Investigation (FBI). It's strength, modularity and M-Lok compatibility gives users the capabilities needed to successfully complete the mission at hand.These rails are...MSRP: $478.13$382.50 -
GEISSELE 13.5 SMR MK16 MLOK DDC
Geissele Automatics
MSRP: $446.25$357.00The Geissele Super Modular Rail MK16 offers unmatched performance for the most demanding shooters. Mounted to your AR-15 upper using the updated version of the proven Geissele Barrel Nut design, the MK16 is not only easy to install and maintain, but...MSRP: $446.25$357.00 -
GEISSELE 13.5 SMR MK16 MLOK BLK
Geissele Automatics
MSRP: $414.38$331.50The Geissele Super Modular Rail MK16 offers unmatched performance for the most demanding shooters. Mounted to your AR-15 upper using the updated version of the proven Geissele Barrel Nut design, the MK16 is not only easy to install and maintain, but...MSRP: $414.38$331.50 -
GEISSELE 16 SMR MK18 MLOK ARCA DDC
Geissele Automatics
MSRP: $541.88$433.50The MK18 is the latest in the line of Geissele Super Modular rails and is specifically made to interface with the Arca-Swiss Quick Release System. This new handguard is based on the MK16 M-LOK Super Modular Rail, offering a small diameter and overall...MSRP: $541.88$433.50 -
GEISSELE 10.5 SPR MOD MK4 MLOK BLK
Geissele Automatics
MSRP: $382.50$306.00Versatile and innovative, Geissele's MK4 DDC Super Modular Rail is a perfect addition to any AR-platform. It features a full length picatinny rail with more than enough space for optics, iron sights, and clip-on night vision/thermal devices. Additional...MSRP: $382.50$306.00 -
GEISSELE 10.5 SPR MOD MK8 MLOK BLK
Geissele Automatics
MSRP: $382.50$306.00Versatile and innovative, Geissele's MK8 DDC Super Modular Rail is a perfect addition to any AR-platform. It features M-LOK attachment points in the 3, 6, and 9 o'clock positions as well as in the upper 45 degree quadrants, giving the user virtually...MSRP: $382.50$306.00 -
GEISSELE 10.5 SPR MOD MK8 MLOK DDC
Geissele Automatics
MSRP: $414.38$331.50Versatile and innovative, Geissele's MK8 DDC Super Modular Rail is a perfect addition to any AR-platform. It features M-LOK attachment points in the 3, 6, and 9 o'clock positions as well as in the upper 45 degree quadrants, giving the user virtually...MSRP: $414.38$331.50 -
FORTIS SWITCH RAIL 308 17 MLOK
Fortis Manufacturing Inc.
MSRP: $356.19$284.95The Fortis SWITCH series is an extremely lightweight, yet robust free float rail system designed for the AR platform. When designing the SWITCH, Fortis wanted a handguard that was easy to install, but also be able to quickly change rails for a variety...MSRP: $356.19$284.95 -
FORTIS SWITCH RAIL 308 15.75 MLOK
Fortis Manufacturing Inc.
MSRP: $338.38$270.70The Fortis SWITCH series is an extremely lightweight, yet robust free float rail system designed for the AR platform. When designing the SWITCH, Fortis wanted a handguard that was easy to install, but also be able to quickly change rails for a variety...MSRP: $338.38$270.70 -
FORTIS SWITCH RAIL MOD2 15.3 MLOK
Fortis Manufacturing Inc.
MSRP: $302.75$242.20The new Switch MOD 2 Series takes the very best from the Switch Series and custom tailors it to fit the needs of our shooters. We eliminated the 12 o'clock picatinny section and replaced it with open vents. This gives a more streamlined appearance to the...MSRP: $302.75$242.20 -
FORTIS SWITCH RAIL MOD2 13.8 MLOK
Fortis Manufacturing Inc.
MSRP: $284.94$227.95The new Switch MOD 2 Series takes the very best from the Switch Series and fine tunes it. The full length 12 o'clock picatinny rail has been eliminated in favor of open vents for heat dissipation and shorter lengths of rail at the front and rear for...MSRP: $284.94$227.95