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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LBE AR TRIGGER GUARD
LBE Unlimited
MSRP: $6.91$5.00Standard AR15 Trigger Guard.MANUFACTURER: LBE UnlimitedMPN: AR15TGMODEL: 0Description: AluminumType: Trigger GuardMSRP: $6.91$5.00 -
LBE AK RETAINING PLATE
LBE Unlimited
MSRP: $6.91$5.00US Made AK Retaining Plate, use in place of the shepard hook spring.MANUFACTURER: LBE UnlimitedMPN: AKRPLTMODEL: AK Retaining PlateType: PartMSRP: $6.91$5.00 -
LBE AR ESSENTIALS KIT
LBE Unlimited
MSRP: $18.89$12.00LBE US Made AR essentials kits are appropriate for your next build and great to have on hand to service your favorite AR.MANUFACTURER: LBE UnlimitedMPN: ARESNTLMODEL: AR Essentials KitType: PartMSRP: $18.89$12.00 -
LBE AR SWIVEL ASSEMBLY
LBE Unlimited
MSRP: $11.32$7.00AR Swivel Assembly, included is a Mil Spec Swivel and RivetMANUFACTURER: LBE UnlimitedMPN: ARSWIVMODEL: AR Swivel AssemblyType: PartMSRP: $11.32$7.00 -
LBE AR FRONT SIGHT TAPER PINS
LBE Unlimited
MSRP: $7.34$5.00AR Front Sight Taper Pins, US Made. Pack of 2MANUFACTURER: LBE UnlimitedMPN: ARTPSMODEL: AR Front Sight Taper PinsType: PartMSRP: $7.34$5.00 -
LBE AR15 BOLT CATCH PLUNGER 20PK
LBE Unlimited
MSRP: $13.81$9.00Pack of 20 AR-15 bolt catch plungers. Made in the USA.MANUFACTURER: LBE UnlimitedMPN: ARBCPL20PKMODEL: 0Description: AR-15 Bolt Catch PlungerType: PartMSRP: $13.81$9.00 -
KAK AR-15 LPK BASIC AMBI BUILD KIT
KAK Industry
MSRP: $44.79$32.00Everything you need for your custom build, and nothing you don't. Just the basics from KAK.MANUFACTURER: KAK IndustryMPN: AR15-LP-KT-03MODEL: AR-15 LPKMSRP: $44.79$32.00 -
KAK AR-15 LPK BASIC BUILD KIT
KAK Industry
MSRP: $34.99$25.00KAK Industry was founded and incorporated in 2011 by Kurt Kosman to address a gap in the firearms market for quality, American-Made components at affordable, sustainable prices.MANUFACTURER: KAK IndustryMPN: AR15-LP-KT-02MODEL: Basic Build KitMSRP: $34.99$25.00 -
FORTIS LW ENHANCD AR15 END PLATE GLD
Fortis Manufacturing Inc.
MSRP: $53.13$38.00The 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$38.00 -
FORTIS K2 ENHANCED END PLATE ODG
Fortis Manufacturing Inc.
MSRP: $59.78$43.00When 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$43.00 -
FORTIS K1 ENHANCED END PLATE ODG
Fortis Manufacturing Inc.
MSRP: $53.13$38.00When 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$38.00 -
FORTIS K1 ENHANCD AR15 END PLATE FDE
Fortis Manufacturing Inc.
MSRP: $53.13$38.00When 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$38.00