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 -
WMD ACCENT BUILD KIT 556 RED
WMD Guns
MSRP: $207.90$149.00The WMD Accent Build Kit 556 Red by WMD Guns is designed to enhance the visual appeal and functionality of your firearm build. This comprehensive kit includes a variety of color-coated components such as the ejection port cover door, forward assist,...MSRP: $207.90$149.00 -
WMD ACCENT BUILD KIT 556 NIB-X
WMD Guns
MSRP: $137.34$99.00The WMD ACCENT BUILD KIT 556 NIB-X by WMD Guns offers an excellent upgrade option for enhancing your AR-15 platform. This build kit features components treated with a nickel boron (NiB-X) coating, known for its exceptional durability and corrosion...MSRP: $137.34$99.00 -
SYLVAN AR FOLDING STK ADAPTER G4 RH
Sylvan Arms
MSRP: $249.19$178.00The Sylvan Arms Gen4 AR Folding Stock Adapter RH is designed to enhance the versatility of your AR platform by enabling a folding stock configuration. Engineered for a right-hand setup, this adapter allows the stock to fold alongside the receiver,...MSRP: $249.19$178.00 -
SYLVAN AR FOLDING STK ADAPTER G4 LH
Sylvan Arms
MSRP: $249.19$178.00The SYLVAN AR Folding Stock Adapter G4 LH by Sylvan Arms is designed to enhance the versatility of your AR platform. This Generation 4 adapter enables the folding of the stock, allowing for a more compact rifle profile that is easier to transport and...MSRP: $249.19$178.00 -
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 -
STRIKE ENHNCD CASTLE NUT W/QD BLK
Strike Industries
MSRP: $81.13$58.00The Strike Industries STRIKE ENHNCD CASTLE NUT W/QD BLK is a precision-engineered component designed to enhance the stability and functionality of AR-style rifles. This enhanced castle nut features an extended design that provides increased thread...MSRP: $81.13$58.00 -
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