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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COLT LOWER RECEIVER PARTS KIT AR15
Colt's Manufacturing
MSRP: $152.95$109.25Convenient kit of genuine Colt factory parts includes all the small parts needed to finish a small-pin AR-15 lower receiver, and install the trigger group and pistol grip of your choice. Or, use the kit to rebuild the worn internals of an old rifle and...MSRP: $152.95$109.25 -
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 -
CMMG BOLT ASSEMBLY AR15
CMMG
MSRP: $89.60$64.00High 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: $89.60$64.00 -
CMMG PARTS KIT AR15 SURVIVAL KIT
CMMG
MSRP: $72.24$51.60High 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: $72.24$51.60 -
CMMG AR-15 PARTS KIT FIELD REPAIR
CMMG
MSRP: $43.86$31.33The Enhanced Field Repair Kit includes parts that all meet or exceed Mil-Spec.MANUFACTURER: CMMGMPN: 55AFF62MODEL: 0Description: Enhanced Field Repair Parts KitType: KitMSRP: $43.86$31.33 -
CMMG PARTS KIT AR15 UPPER PINS/SPRNG
CMMG
MSRP: $23.35$14.15Parts Kit, AR15, Upper Pins and Springs. All Parts Meet or Exceed Mil-Spec.MANUFACTURER: CMMGMPN: 55AFF2FMODEL: 0Type: KitMSRP: $23.35$14.15 -
CMMG PART KIT AR15 LOWER PINS/SPRING
CMMG
MSRP: $23.93$14.50Parts Kit, AR15, Lower Pins and Springs. All Parts Meet or Exceed Mil-Spec.MANUFACTURER: CMMGMPN: 55AFF75MODEL: ARDescription: Lower Spring and Pin KitType: KitColor: BlackMSRP: $23.93$14.50 -
CMC AR-15 LPK W/FLAT TRIGGER
CMC Triggers
MSRP: $280.13$224.10Enhanced with a 3.5lb Single Stage Flat Trigger, this kit is a great addition to your AR15 build. From amateur gun builder to seasoned expert gun smith, this lower parts kit is for you. NOTE: Grip NOT included. Kit Contains 3.5lb Single Stage Trigger 1...MSRP: $280.13$224.10