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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LUTH AR PADDLE BOLT CATCH 308
Luth-AR
MSRP: $32.83$24.00The Paddle .308 Oversize Bolt Catch allows easy and rapid bolt manipulation. The large paddle facilitates positive bolt release and locking. It is perfect for use in competition where high-speed manipulation counts, as well as hunting, law enforcement,...MSRP: $32.83$24.00 -
LUTH AR HELICAL 1 PIECE GAS RING 308
Luth-AR
MSRP: $6.75$5.00High quality components and precise manufacturing make LuthAR parts ideal for maintaining and upgrading firearms. The durability, reliability and excellent build quality of these parts will ensure years of service you can count on.MANUFACTURER:...MSRP: $6.75$5.00 -
LUTH AR TEARDROP FORWARD ASSIST ASSY
Luth-AR
MSRP: $29.87$19.00Maintain the smooth operation of your AR-15 with Luth-AR's complete teardrop forward assembly. This high-quality set includes all the components you need to properly install your forward assist, including the teardrop forward assist, assist spring, and...MSRP: $29.87$19.00 -
LBE AR CASTLE NUT
LBE Unlimited
MSRP: $10.63$7.00The LBE AR-15 Castle Nut is made of 4140 steel and has a Magnesium Phosphate finish. Made in the USA.MANUFACTURER: LBE UnlimitedMPN: ARCNUTMODEL: Castle NutFinish: Manganese PhosphateType: Castle NutMSRP: $10.63$7.00 -
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 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 SELECTOR DETENT 20PK
LBE Unlimited
MSRP: $16.57$11.00This is a 20-pack of AR-15 selector detents made of 12L14 steel. Made in the USA.MANUFACTURER: LBE UnlimitedMPN: ARSLDT20PKMODEL: 0Description: DetentType: PartMSRP: $16.57$11.00 -
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 LOWER PARTS KIT NO FCG
KAK Industry
MSRP: $44.79$32.00KAK 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: 506-1015-009MODEL: AR-15 Lower Parts...MSRP: $44.79$32.00 -
KAK AR-15 LPK NO GRIP/TRIGGER GUARD
KAK Industry
MSRP: $62.99$45.00KAK 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: 506-1015-008MODEL: AR-15 Lower Parts...MSRP: $62.99$45.00 -
FORTIS K2 ENHANCD AR15 END PLATE BLK
Fortis Manufacturing Inc.
MSRP: $59.78$43.00When 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: $59.78$43.00