The LLRPK-1 AR-15 Lower Receiver Parts Kit from Luth-AR contains all the parts, down to the last spring and pin, to turn a stripped lower into a complete receiver ready for the buffer tube, buffer system and stock of your choice. Sure, we sell all of these parts separately, and Luth-AR has made a big name for itself in the last few years as a supplier of top-quality AR-15 accessories AND basic mil-spec parts. But why chase down all of these mil-spec commodity parts separately when this parts kit provide easy, "one and done" ordering? This parts kit includes complete, mil-spec AR-15 fire control components - trigger, hammer, disconnector, and all the pins-n-springs. Just note that it’s not a drop-in module, so you will have to assemble the parts. If you’ve done it before, no problem. If you haven’t, watch this video a few times before tackling it. Here are the complete contents of the LLRPK-1 lower receiver parts kit: Buffer Retainer & Buffer Retainer Spring Triggerguard & pin Safety selector lever + detent Selector/Ejector spring Bolt Catch + spring, plunger & roll pin Magazine catch Magazine release button (aluminum) Front pivot pin Rear takedown pin 2x Takedown/pivot pin detents 2x Detent springs Trigger Trigger spring Hammer, mil-spec w/J spring Hammer spring 2x hammer/trigger pin Disconnector Disconnector spring Mag Catch/Buttstock Plunger Spring 1-ea. A2 pistol grip (black plastic) Pistol grip bolt (slot-head) Pistol grip lock washer The Luth-AR folks also thoughtfully includes a standard A2-type plastic pistol grip that’ll get you up and shooting until you decide if you want a fancier, aftermarket grip. A lot of AR-15 shooters have spent their entire careers using the A2 grip, but if you want to upgrade, Brownells offers a LOT of options. Get the Luth-AR LLRPK-1 lower receiver parts kit, and you’ll be sure that when you sit down at your workbench to assemble your next AR-15, completion your project won’t be held up for lack of one or two small parts!