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$40.00The Primary Weapons Systems (PWS) Ratchet Lock Castle Nut and End Plate set offers a reliable upgrade for rifle builders seeking enhanced functionality and ease of installation. Designed to fit both mil-spec and commercial buffer tubes, this Ratchet Lock...MSRP: $55.93$40.00 -
SYLVAN AR15 FLARED MAGWELL BLACK
Sylvan Arms
MSRP: $61.59$44.00The Sylvan Arms AR15 Flared Magwell in black is designed to enhance magazine insertion speed and ease for AR-15 platforms. Crafted with precision, this magwell features a wider flare compared to standard models, facilitating quicker, more intuitive...MSRP: $61.59$44.00 -
STRIKE AR ANTI-WALK PINS BLK
Strike Industries
MSRP: $24.67$15.00The Strike Industries STRIKE AR ANTI-WALK PINS BLK are precision-engineered takedown pins designed to enhance the reliability of your AR-platform rifle. Crafted to prevent unwanted movement or “walking” of the trigger pins, these anti-rotation pins...MSRP: $24.67$15.00 -
STRIKE MULTI FUNCTION END PLATE
Strike Industries
MSRP: $48.93$35.00The Strike Industries STRIKE MULTI FUNCTION END PLATE offers a refined solution for AR-style rifle builds, enhancing the traditional castle nut and end plate assembly. Engineered by Strike Industries, this component replaces the standard end plate with a...MSRP: $48.93$35.00 -
STRIKE BILLET TRIGGER GUARD BLK
Strike Industries
MSRP: $36.33$30.00The Strike Industries STRIKE BILLET TRIGGER GUARD BLK is a precision-crafted accessory designed to enhance both the aesthetics and functionality of your rifle. Constructed from high-quality billet aluminum, this trigger guard offers superior durability...MSRP: $36.33$30.00 -
SPIKE S TAC BILLET TRIGGER GUARD G2
Spike's Tactical
MSRP: $37.74$27.00The Spike's Tactical TAC Billet Trigger Guard G2 is a precision-engineered upgrade designed to enhance the functionality and aesthetics of your firearm. Crafted from billet aluminum, this trigger guard offers increased space compared to standard models,...MSRP: $37.74$27.00 -
RISE UPPER PARTS KIT
Rise Armament
MSRP: $48.99$35.00The Rise Armament RISE Upper Parts Kit offers a comprehensive selection of high-quality components designed to enhance the performance and reliability of your upper receiver assembly. Manufactured with precision and attention to detail, this kit provides...MSRP: $48.99$35.00 -
RISE OS KIT SPARE AR-15 PARTS
Rise Armament
MSRP: $26.38$16.00The RISE OS Kit Spare AR-15 Parts, manufactured by Rise Armament, is a comprehensive collection of essential components designed to assist with maintenance and repair of AR-15 rifles. This kit includes a variety of small but critical parts such as...MSRP: $26.38$16.00 -
RADIAN ULTRALIGHT QD AR15 ENDPLATE
Radian Weapons
MSRP: $55.93$40.00The Radian Weapons Ultralight QD AR15 Endplate offers a precision-engineered solution for AR15 and M16 pattern rifles. Crafted from billet 7075-T6 aluminum, this endplate combines exceptional strength with minimal weight, tipping the scales at just 6.5...MSRP: $55.93$40.00 -
PHASE5 SLOPED QD END PLATE BLK
Phase 5 Weapon Systems
MSRP: $62.99$45.00The Phase 5 Weapon Systems Sloped Quick Disconnect End Plate (SQD-EP) is engineered as a direct replacement for the standard AR15/M4 carbine end plate. This end plate is designed to be lighter while maintaining the structural integrity required for...MSRP: $62.99$45.00 -
MAGPUL B.A.D. LEVER BLK
Magpul Industries
MSRP: $43.82$32.00The MAGPUL B.A.D. Lever BLK is a precision-engineered accessory designed to enhance the functionality of AR15 and M16 platforms. Manufactured by Magpul Industries, this bolt catch lever extends a paddle to the right side of the rifle, enabling quicker...MSRP: $43.82$32.00 -
MAGPUL ALUM ENHANCED TRIGGER GRD
Magpul Industries
MSRP: $30.52$22.00The Magpul ALUM Enhanced Trigger Guard is a precision-engineered aluminum replacement designed specifically for the AR-15/M4 platform. Crafted by Magpul Industries, this trigger guard offers a durable, lightweight alternative to standard polymer models,...MSRP: $30.52$22.00