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
GEISSELE 10.5 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 -
Out of stock
GEISSELE 10 SUPER MOD MK4 FED ODG
Geissele Automatics
MSRP: $510.00$408.00Geissele's Super Modular MK4 Rail is used by the Federal Bureau of Investigation due to its strength, modularity, and M-LOK compatibility. It features M1913 picatinny rails in the 6 o'clock and 12 o'clock positions, as well as shorter M1913 picatinny...MSRP: $510.00$408.00 -
Out of stock
GEISSELE 10 SUPER MOD MK4 FED BLK
Geissele Automatics
MSRP: $478.13$383.00This 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$383.00 -
Out of stock
GEISSELE 16 SMR MK18 MLOK ARCA DDC
Geissele Automatics
MSRP: $541.88$434.00The 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$434.00 -
Out of stock
GEISSELE 15 SPR MOD MK14 MLOK DDC
Geissele Automatics
MSRP: $446.25$357.00Geissele's Super Modular Rail (SMR) MK14 M-LOK handguard is the latest entry to the Geissele line-up of Super Modular Rails. The new handguard design offers a smaller diameter and overall height to create a slimmer package. Included with the MK14 Super...MSRP: $446.25$357.00 -
Out of stock
GEISSELE 15 SUPER MOD MK14 MLOK BLK
Geissele Automatics
MSRP: $414.38$332.00Geissele's Super Modular Rail (SMR) MK14 M-LOK handguard is the latest entry to the Geissele line-up of Super Modular Rails. The new handguard design offers a smaller diameter and overall height to create a slimmer package. Included with the MK14 Super...MSRP: $414.38$332.00 -
Out of stock
GEISSELE 13.5 SPR MOD MK14 MLOK DDC
Geissele Automatics
MSRP: $382.50$306.00Geissele's Super Modular Rail (SMR) MK14 M-LOK handguard is the latest entry to the Geissele line-up of Super Modular Rails. The new handguard design offers a smaller diameter and overall height to create a slimmer package. Included with the MK14 Super...MSRP: $382.50$306.00 -
Out of stock
GEISSELE 9.3 SPR MOD MK14 MLOK BLK
Geissele Automatics
MSRP: $350.63$281.00Geissele's Super Modular Rail (SMR) MK14 M-LOK handguard is the latest entry to the Geissele line-up of Super Modular Rails. The new handguard design offers a smaller diameter and overall height to create a slimmer package. Included with the MK14 Super...MSRP: $350.63$281.00 -
Out of stock
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 -
Out of stock
GEISSELE 10.5 SPR MOD MK8 MLOK DDC
Geissele Automatics
MSRP: $414.38$332.00Versatile 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: $414.38$332.00 -
Out of stock
FORTIS SWITCH RAIL 308 17 MLOK
Fortis Manufacturing Inc.
MSRP: $356.19$285.00The 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$285.00 -
Out of stock
FORTIS SWITCH RAIL MOD2 15.3 MLOK
Fortis Manufacturing Inc.
MSRP: $302.75$243.00The 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$243.00