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 AR15 SELECTOR DETENT 20PK
LBE Unlimited
MSRP: $16.57$10.04This 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$10.04 -
KAK AR-15 LPK BASIC BUILD KIT
KAK Industry
MSRP: $34.99$24.99KAK 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$24.99 -
KAK AR-15 LOWER PARTS KIT NO FCG
KAK Industry
MSRP: $44.79$31.99KAK 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$31.99 -
KAK AR-15 LPK NO GRIP/TRIGGER GUARD
KAK Industry
MSRP: $62.99$44.99KAK 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$44.99 -
Out of stock
FORTIS K2 ENHANCD AR15 END PLATE GRY
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 -
DBST FIELD REPAIR KIT
Doublestar Corp.
MSRP: $64.39$45.99The field repair kit was designed to provide the most commonly worn or broken parts in your semi auto AR15. It's a great addition to your range bag! All parts are high quality.MANUFACTURER: Doublestar Corp.MPN: AR785MODEL: 0Description: Repair Kit...MSRP: $64.39$45.99 -
DBST OOPS! REPLACEMENT KIT
Doublestar Corp.
MSRP: $24.73$14.99Sometimes parts go missing or need replacement. Don't be caught unprepared with a useless rifle and stand ready with the Double Star Oops! Kit. The kit fits easily in your range bag, backpack, and even in your pocket. Never say Oops! with the Double Star...MSRP: $24.73$14.99 -
CMMG PARTS KIT AR15 MAGAZINE CATCH
CMMG
MSRP: $18.78$11.38High quality components and precise manufacturing make CMMG 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: CMMGMPN:...MSRP: $18.78$11.38 -
CMMG AR15 END PLATE AMBI SLING POINT
CMMG
MSRP: $12.08$7.32Since 2002 CMMG has been the leading manufacturer of AR-15 rifles, AR-10 rifles, and trailblazing AR technologies. CMMG offers premium AR-15 and AR-10 rifles, parts, and accessories.MANUFACTURER: CMMGMPN: 55CA9ACMODEL: Receiver End PlateColor: BlackMSRP: $12.08$7.32 -
CMMG AR15 BUFFER TUBE CASTLE NUT
CMMG
MSRP: $15.02$9.10Since 2002 CMMG has been the leading manufacturer of AR-15 rifles, AR-10 rifles, and trailblazing AR technologies. CMMG offers premium AR-15 and AR-10 rifles, parts, and accessories.MANUFACTURER: CMMGMPN: 55CA9CBMODEL: Receiver Extension NutFinish:...MSRP: $15.02$9.10 -
CMMG 9MM EJECTION PORT COVER KIT
CMMG
MSRP: $24.59$14.90Includes ejection port cover, rod, brass deflector, and spring.MANUFACTURER: CMMGMPN: 22BA627MODEL: 0Type: KitMSRP: $24.59$14.90 -
CMMG EJECTION PORT COVER KIT
CMMG
MSRP: $16.65$10.09Includes ejection port cover, rod, and spring.MANUFACTURER: CMMGMPN: 55BA6E3MODEL: 0Description: Ejection Port Cover KitType: KitMSRP: $16.65$10.09