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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CMMG AR15 BUFFER TUBE CASTLE NUT
CMMG
MSRP: $15.02$10.00Since 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$10.00 -
CMMG 9MM EJECTION PORT COVER KIT
CMMG
MSRP: $24.59$15.00Includes ejection port cover, rod, brass deflector, and spring.MANUFACTURER: CMMGMPN: 22BA627MODEL: 0Type: KitMSRP: $24.59$15.00 -
CMMG EJECTION PORT COVER KIT
CMMG
MSRP: $16.65$10.00Includes ejection port cover, rod, and spring.MANUFACTURER: CMMGMPN: 55BA6E3MODEL: 0Description: Ejection Port Cover KitType: KitMSRP: $16.65$10.00 -
CMMG FORWARD ASSIST KIT
CMMG
MSRP: $29.78$17.00Includes forward assist assembly, spring, and installation pin.MANUFACTURER: CMMGMPN: 55BA556MODEL: 0Type: KitColor: BlackMSRP: $29.78$17.00 -
CMMG BOLT ASSEMBLY AR15
CMMG
MSRP: $89.60$63.00High 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$63.00 -
CMMG PARTS KIT AR15 SURVIVAL KIT
CMMG
MSRP: $72.24$52.00High 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: $72.24$52.00 -
CMMG PART KIT AR15 BOLT REHAB
CMMG
MSRP: $44.58$30.00Kit for repairing your Bolt/BCG. All Parts Meet or Exceed Mil-Spec.MANUFACTURER: CMMGMPN: 55AFF68MODEL: 0Description: Parts KitType: KitMSRP: $44.58$30.00 -
CMMG AR-15 PARTS KIT FIELD REPAIR
CMMG
MSRP: $43.86$30.00The 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$30.00 -
CMMG PARTS KIT AR15 UPPER PINS/SPRNG
CMMG
MSRP: $23.35$13.00Parts Kit, AR15, Upper Pins and Springs. All Parts Meet or Exceed Mil-Spec.MANUFACTURER: CMMGMPN: 55AFF2FMODEL: 0Type: KitMSRP: $23.35$13.00 -
CMMG PART KIT AR15 LOWER PINS/SPRING
CMMG
MSRP: $23.93$15.00Parts 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$15.00 -
CMC AR-15 LPK W/FLAT TRIGGER
CMC Triggers
MSRP: $280.13$225.00Enhanced 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$225.00 -
CMC AR-15 LPK W/CURVED TRIGGER
CMC Triggers
MSRP: $280.13$225.00Enhanced with a 3.5lb Single Stage Curved 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$225.00