The CMMG Gunbuilder’s Lower Parts Kit allows you to pay for only the parts you need and nothing you don’t. To complete your AR15 lower receiver you will need to add your choice of complete fire control/trigger group, trigger guard, pistol grip assembly. buffer, buffer spring, receiver extension, receiver end plate, castle nut, and butt stock to the contents of this package. All the parts included in this package meet or exceed military specifications.
Made in the USA.