The lower receiver is the heart of your AR-15, and the lower parts kit (LPK) is the lifeblood. Every pin, spring, and detent plays a critical role in the function and reliability of your rifle. At EGW, we've sourced and assembled premium, American-made components to ensure your build is not just successful, but superior. Whether you're building a new rifle, upgrading a trigger, or just need a spare "oops" kit, you'll find the highest quality AR-15 parts right here.
Get exactly what you need for your AR build. Explore our complete LPKs or find individual components and repair kits below.
Everything you need to populate a stripped AR-15 lower receiver, available with multiple grip and trigger guard options.
Save your build from a lost detent or spring. Every builder should have one of these essential repair kits on hand.
Looking for a specific component? Browse our selection of individual takedown pins, safeties, and mag catches.
The AR lower parts kit, commonly known as an LPK, is a collection of all the small components needed to populate a stripped lower receiver. Every pin, spring, and detent is critical for function and reliability. This guide will help you understand what's in an AR-15 lower parts kit and how to choose the right one for your build.
Many "complete" lower parts kits force you to pay for a gritty, mil-spec trigger and a basic A2 pistol grip you're just going to replace anyway. Our EGW lower parts kit is different. We provide all the high-quality, American-made core components—every pin, spring, detent, and catch you need—while letting you choose the trigger and grip that match your specific build. Don't pay for parts you don't need; start your build with a premium EGW foundation.
Our kit includes all the core components needed to assemble a lower receiver, minus the Fire Control Group and Pistol Grip. The complete list is: Bolt Catch, Bolt Catch Plunger, Bolt Catch Roll Pin, Bolt Catch Spring, Buffer Retainer, Buffer Retainer Spring, Magazine Catch, Magazine Catch Button, Magazine Catch Spring, Pivot Pin, Takedown Pin, (2) Takedown / Pivot Pin Detents, and (2) Takedown / Pivot Pin Detent Springs.
No. Our kit is designed for builders who want to select their own high-performance trigger and ergonomic pistol grip. This saves you money and ensures you don't end up with a box of unwanted mil-spec parts. You will need to purchase a Fire Control Group (trigger, hammer, disconnector) and a pistol grip with its screw/washer separately to complete your lower.
An "Oops Kit" is a small, inexpensive bag containing the parts that are most commonly lost during an AR-15 build. This includes the tiny detents and springs for the takedown pins and safety selector. Our LPK contains these items, but having a separate Oops Kit on your workbench is always a cheap insurance policy against a frustrating search on your hands and knees.
