AR Lower Parts Kits
AR lower parts kits are the backbone of any AR-15 build — without the right components, your lower receiver is just a paperweight. Whether you’re assembling a rifle from scratch or refreshing worn internals on a hard-used gun, having the right parts in a complete, matched kit makes the difference between a smooth build and a frustrating one. These aren’t glamorous, but any builder who’s sourced components piecemeal knows exactly what a well-stocked kit is worth.. You’ll find kits with and without fire control groups depending on how you want to configure your build, along with options in stainless and hardened finishes for specific applications. Running a dedicated trigger group? Grab a kit without the FCG and drop in your preferred unit. Building standard mil-spec? Grab a complete kit and get to work.
- AR Lower Parts Kits Add to cart
Armaspec Superlight 223 5.56 NATO Black Lower Parts Kit delivers durable, reliable components engineered for precision performance in firearm maintenance and upgrades.
$77.00In Stock - AR Lower Parts Kits Add to cart
Armaspec Superlight Gun Builder Kit AR10 in Flat Dark Earth helps you assemble a lightweight AR10 platform with pre-dimensioned components, supplied less trigger group and grip.
$86.39Low Stock - AR Lower Parts Kits Add to cart
Armaspec Superlight Gun Builder Kit AR15 delivers lightweight AR-15 construction in black, complete with everything except trigger group and grip.
$71.99In Stock - AR Lower Parts Kits Add to cart
Armaspec Superlight Gun Builder Kit lets you build your AR15 exactly how you want it, with Flat Dark Earth finish and flexibility to add your own trigger group and grip.
$72.00Low Stock - AR Lower Parts Kits Add to cart
Battle Arms Development Enhanced Lower Parts Kit from B.A.D. Inc. delivers premium small arms engineering from this Nevada-based innovator established in 2009. Engineered to advance production standards for discerning shooters.
$34.95In Stock - AR Lower Parts Kits Add to cart
CMC AR-15 Lower Parts Kit features a crisp 3.5lb Single Stage Flat Trigger with all essential components meeting or exceeding MIL SPEC—grip not included.
$224.10Low Stock - AR Lower Parts Kits Add to cart
CMC Triggers AR-15 lower parts kit features a crisp 3.5lb Single Stage Curved Trigger with all MIL SPEC components needed to complete your build. Grip not included.
$224.10In Stock - AR Lower Parts Kits Add to cart
CMC Triggers AR-15 Multi-Caliber Lower Parts Kit supplies all essential components to complete your lower receiver assembly, with parts meeting or exceeding MIL SPEC standards. Ideal for builders at any skill level, from first-time builders to experienced gunsmiths.
$35.96In Stock - AR Lower Parts Kits Add to cart
CMMG AR-15 5.56 NATO lower parts kit delivers essential components for lower group assembly, excluding trigger guard, fire control group, and pistol grip for maximum customization flexibility.
$39.00In Stock - AR Lower Parts Kits Add to cart
CMMG Mk3 lower parts kit delivers the essential components for assembling your LR308 lower group, excluding the fire control group and pistol grip so you can customize with your preferred upgrades.
Original price was: $48.00.$44.00Current price is: $44.00. SALEIn Stock - AR Lower Parts Kits Add to cart
CMMG Lower Parts Kit 308 Winchester delivers all essential components to start your Mk3 build, compatible with CMMG Mk3 Lowers and most LR308 type lowers.
$81.00In Stock - AR Lower Parts Kits Add to cart
CMMG ZEROED LOWER PARTS KIT – FOR MK3 308
Original price was: $126.00.$117.00Current price is: $117.00. SALEIn Stock - AR Lower Parts Kits Add to cart
Guntec USA Complete Lower Parts Kit AR15 delivers everything you need for AR15 lower assembly with an ergonomic grip, made in the USA.
$81.00In Stock - AR Lower Parts Kits Add to cart
Guntec USA Complete Lower Parts Kit delivers all essential AR-15 lower receiver hardware in one Made in the USA package—just add your own pistol grip.
$63.00In Stock - AR Lower Parts Kits Add to cart
Rise Armament lower parts kit components deliver precision-manufactured quality for reliable firearm upgrades and maintenance. Built to exacting standards for lasting durability.
$44.99In Stock
