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 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$40.00 -
NOVESKE QUICK DETACH END PLATE BLK
Noveske
MSRP: $41.64$30.00Carbine Receiver End Plate with QD Sling Swivel Attachment made by Noveske.MANUFACTURER: NoveskeMPN: 05000094MODEL: Quick Detach MountDescription: Quick DetachType: MountColor: BlackMSRP: $41.64$30.00 -
WMD ACCENT BUILD KIT 556 RED
WMD Guns
MSRP: $207.90$149.00The color coated parts included are: Ejection Port Cover Door, Forward Assist, Castle Nut, Receiver End Plate, Bolt Catch, Mag Lever, Mag Button, Pivot Pin, Takedown Pin, Trigger Guard, Buffer Retainer. Also includes the pins and spring kit for the Lower...MSRP: $207.90$149.00 -
WMD ACCENT BUILD KIT 556 FDE
WMD Guns
MSRP: $207.90$149.00The color coated parts included are: Ejection Port Cover Door, Forward Assist, Castle Nut, Receiver End Plate, Bolt Catch, Mag Lever, Mag Button, Pivot Pin, Takedown Pin, Trigger Guard, Buffer Retainer. Also includes the pins and spring kit for the Lower...MSRP: $207.90$149.00 -
WMD ACCENT BUILD KIT 556 NIB-X
WMD Guns
MSRP: $137.34$99.00Spice up your favorite AR-15 with WMD's NiB-X coating accent parts kit. Featuring nickel boron coating to provide long life, high reliability and easy cleaning and maintenance. These parts are designed to last!MANUFACTURER: WMD GunsMPN:...MSRP: $137.34$99.00 -
TPS AR-15 QUICK REPAIR KIT
TPS Arms
MSRP: $16.57$11.00High quality components and precise manufacturing make TPS Arms 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: TPS...MSRP: $16.57$11.00 -
SYLVAN AR FOLDING STK ADAPTER G4 RH
Sylvan Arms
MSRP: $249.19$178.00The Folding Stock Adapter allows you to fold your stock and significantly reduce the length of your rifle for easy stow and travel. The Gen 4 AR Folding Adapter sits closer to your AR lower to reduce the length and any gaps. Turn your rifle into a...MSRP: $249.19$178.00 -
SYLVAN AR FOLDING STK ADAPTER G4 LH
Sylvan Arms
MSRP: $249.19$178.00The Folding Stock Adapter allows you to fold your stock and significantly reduce the length of your rifle for easy stow and travel. The Gen 4 AR Folding Adapter sits closer to your AR lower to reduce the length and any gaps. Turn your rifle into a...MSRP: $249.19$178.00 -
SYLVAN AR15 FLARED MAGWELL BLACK
Sylvan Arms
MSRP: $61.59$44.00The Sylvan Arms Flared Magwell allows no-look, faster loading of magazines. With integral trigger guard, and wider flare than competing products, the Sylvan Arms Flared Magwell outperforms any other magwell available on the market today.MANUFACTURER:...MSRP: $61.59$44.00 -
STRIKE AR ANTI-WALK PINS BLK
Strike Industries
MSRP: $24.67$15.00The 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$15.00 -
STRIKE MULTI FUNCTION END PLATE
Strike Industries
MSRP: $48.93$35.00The SI Multi-Function End Plate and Anti-Rotation Castle Nut are designed to modernize and improve the often overlooked castle nut and endplate system. While the traditional endplate and castle nut work very well in securing your receiver extension,...MSRP: $48.93$35.00 -
STRIKE BILLET TRIGGER GUARD BLK
Strike Industries
MSRP: $36.33$26.00Form meets function with the Strike Industries line of Aluminum trigger guards. Not only does the sculpted, billet aluminum trigger guard make your rifle stand out from the pack, it also provides real added value over the competition. The Cobra's hood...MSRP: $36.33$26.00