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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PWS RATCHET LCK CASTLE NUT/END PLATE
Primary Weapons Systems
MSRP: $55.93$39.95The Ratchet Lock Castle Nut End Plate set works with mil-spec OR commercial buffer tubes and eliminates the need for staking. A quick upgrade to any rifle build, the Ratchet Lock Castle Nut End Plate features a QD mount and easy installation with any...MSRP: $55.93$39.95 -
STRIKE AR ANTI-WALK PINS BLK
Strike Industries
MSRP: $24.67$14.95The SI Anti-Walk/Anti-Rotation Pin Set is a fantastic piece of hardware that adds an extra degree of security to prevent your trigger pins from walking out under fire or harsh use.MANUFACTURER: Strike IndustriesMPN: SI-AR-AWPMODEL: 0Description: Ultra...MSRP: $24.67$14.95 -
MAGPUL B.A.D. LEVER BLK
Magpul Industries
MSRP: $43.82$31.30Designed to considerably improve the speed and efficiency of the AR15/M16 bolt catch, the B.A.D. Lever quickly addresses reloading and malfunction clearance shortcomings of AR15/M16 platforms by extending a paddle to the right side of the weapon,...MSRP: $43.82$31.30 -
MAGPUL ALUM ENHANCED TRIGGER GRD
Magpul Industries
MSRP: $30.52$21.80The Enhanced Trigger Guard is a black anodized aluminum drop in replacement for the AR15/M4 weapons platform. It features a shallow V shape for better use of gloves in tactical shooting or cold weather operations. The Enhanced Trigger Guard is...MSRP: $30.52$21.80 -
LUTH AR CARBINE LOCK RING/CASTLE NUT
Luth-AR
MSRP: $7.84$4.75High 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: $7.84$4.75 -
LUTH AR CARBINE LATCH PLATE
Luth-AR
MSRP: $5.05$3.06High 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: $5.05$3.06 -
LBE AR CASTLE NUT
LBE Unlimited
MSRP: $10.63$6.44The 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$6.44 -
LANTAC RPS END PLATE & CASTLE NUT
LanTac USA LLC
MSRP: $76.99$54.99High quality components and precise manufacturing make Lantac 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: LanTac...MSRP: $76.99$54.99 -
KAK AR-15 LPK BASIC AMBI BUILD KIT
KAK Industry
MSRP: $44.79$31.99Everything 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$31.99 -
CMMG PARTS KIT AR15 BOLT CATCH
CMMG
MSRP: $17.33$10.50High 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: $17.33$10.50 -
CMMG PART KIT AR15 BOLT REHAB
CMMG
MSRP: $44.58$31.84Kit for repairing your Bolt/BCG. All Parts Meet or Exceed Mil-Spec.MANUFACTURER: CMMGMPN: 55AFF68MODEL: 0Description: Parts KitType: KitMSRP: $44.58$31.84 -
CALDWELL AR FIELD REPAIR KIT
Caldwell
MSRP: $17.42$10.56This kit includes replacement detents and springs for the AR-15 that are most commonly damaged or lost.MANUFACTURER: CaldwellMPN: 1078425MODEL: 0Type: KitMSRP: $17.42$10.56