Lower Parts
Build or upgrade your rifle with quality AR-15 lower parts from Gas & Brass Armory in Brandon, FL. We offer complete lower parts kits (LPKs), individual components, upgraded triggers, buffer retainers, takedown pins, and more. Whether you’re doing a full lower build or fine-tuning your trigger and controls, we carry reliable parts from Aero Precision, CMC, Rise Armament, and other trusted brands. Everything you need to finish your lower, all in one place.
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Out of stock
FORTIS K2 ENHANCD AR15 END PLATE BLK
Fortis Manufacturing Inc.
MSRP: $59.78$42.70When designing their new Lightweight Enhanced (LE) Castle Nut & End Plate System, Fortis came up with two systems that virtually eliminates the risk of your castle nut ever backing out. With two lockdown systems (K1 & K2), Fortis has engineered a...MSRP: $59.78$42.70 -
Out of stock
FORTIS LW ENHANCD AR15 END PLATE GLD
Fortis Manufacturing Inc.
MSRP: $53.13$37.95The K1 system features a tapered castle nut that seals itself onto the end plate. This ultra precision snug fit allows the castle nut to seat and seal itself into place without the need of staking the end plate. No ratcheting, no set screws, no backing...MSRP: $53.13$37.95 -
Out of stock
FORTIS LW ENHANCD AR15 END PLATE BLK
Fortis Manufacturing Inc.
MSRP: $53.13$37.95The K1 system features a tapered castle nut that seals itself onto the end plate. This ultra precision snug fit allows the castle nut to seat and seal itself into place without the need of staking the end plate. No ratcheting, no set screws, no backing...MSRP: $53.13$37.95 -
Out of stock
FORTIS K2 ENHANCED END PLATE ODG
Fortis Manufacturing Inc.
MSRP: $59.78$42.70When designing the new Lightweight Enhanced (LE) Castle Nut & End Plate System, Fortis came up with two systems that virtually eliminates the risk of your castle nut ever backing out. With the two lockdown systems (K1 & K2), they've engineered a solution...MSRP: $59.78$42.70 -
Out of stock
FORTIS K1 ENHANCED END PLATE ODG
Fortis Manufacturing Inc.
MSRP: $53.13$37.95When designing the new Lightweight Enhanced (LE) Castle Nut & End Plate System, Fortis came up with two systems that virtually eliminates the risk of your castle nut ever backing out. With the two lockdown systems (K1 & K2), Fortis has engineered a...MSRP: $53.13$37.95 -
Out of stock
FORTIS K1 ENHANCD AR15 END PLATE FDE
Fortis Manufacturing Inc.
MSRP: $53.13$37.95When designing their new Lightweight Enhanced (LE) Castle Nut & End Plate System, Fortis came up with two systems that virtually eliminates the risk of your castle nut ever backing out. With two lockdown systems (K1 & K2), Fortis has engineered a...MSRP: $53.13$37.95 -
Out of stock
FORTIS K1 ENHANCD AR15 END PLATE GRY
Fortis Manufacturing Inc.
MSRP: $53.13$37.95When designing their new Lightweight Enhanced (LE) Castle Nut & End Plate System, Fortis came up with two systems that virtually eliminates the risk of your castle nut ever backing out. With two lockdown systems (K1 & K2), Fortis has engineered a...MSRP: $53.13$37.95 -
Out of stock
FORTIS K2 ENHANCD AR15 END PLATE FDE
Fortis Manufacturing Inc.
MSRP: $59.78$42.70When designing their new Lightweight Enhanced (LE) Castle Nut & End Plate System, Fortis came up with two systems that virtually eliminates the risk of your castle nut ever backing out. With two lockdown systems (K1 & K2), Fortis has engineered a...MSRP: $59.78$42.70 -
Out of stock
FORTIS END PLATE & CASTLE NUT
Fortis Manufacturing Inc.
MSRP: $32.84$19.90The Fortis Standard Castle Nut is manufactured from a solid piece of billet aircraft grade aluminum that offers a significant weight reduction to your castle nut. If you're trying to save ounces, this is a great way, but without sacrificing durability...MSRP: $32.84$19.90 -
Out of stock
FORTIS STANDARD CASTLE NUT
Fortis Manufacturing Inc.
MSRP: $18.73$11.35The Fortis Standard Castle Nut is manufactured from a solid piece of billet aircraft grade aluminum that offers a significant weight reduction to your castle nut. If you're trying to save ounces, this is a great way, but without sacrificing durability...MSRP: $18.73$11.35 -
Out of stock
COLT FIELD REPAIR KIT M4/AR15
Colt's Manufacturing
MSRP: $54.74$39.10Prepare your AR15/M4 for anything with the Colt's Manufacturing Field Repair Kit-an essential collection of mil-spec replacement parts designed to keep your rifle running in peak condition. Whether you're facing worn components after extended range time...MSRP: $54.74$39.10 -
Out of stock
COLT HIGH WEAR PARTS KIT M4/AR15
Colt's Manufacturing
MSRP: $37.24$26.60COLT HIGH WEAR PARTS KIT M4/AR15MANUFACTURER: Colt's ManufacturingMPN: SPK403980MODEL: High Wear Parts Repair KitType: KitColor: BlackMSRP: $37.24$26.60