Luth-AR M4 Adjustable Carbine Buttstock Assembly Kit Features The Luth-AR M4 Adjustable Carbine Buttstock Assembly Kit gives builders a complete carbine buffer system for a .223/5.56 AR-15 lower in one package. The familiar M4 waffle pattern buttstock adjusts across a mil spec 6 position buffer tube allowing the shooter to dial in the correct length of pull for their build and body type. A properly weighted .223/5.56 buffer and matching buffer spring work together to cycle the action reliably across a range of ammunition types. Finished in black the stock matches the standard appearance most AR-15 owners expect from a mil spec build. Rounding out the kit are a latch plate and lock ring both of which are needed to properly secure the buffer tube to the lower receiver during assembly. Having every component included in a single kit saves builders from tracking down individual parts separately or mismatching buffer weights and tube specifications. This kit is a practical choice for anyone assembling a lower from scratch or replacing a damaged or missing stock assembly on an existing rifle. For a straightforward complete carbine stock solution the Luth-AR M4 Adjustable Carbine Buttstock Assembly Kit is available for sale at GrabAGun. Luth-AR M4 Adjustable Carbine Buttstock Assembly Kit Specifications Manufacturer: Luth-AR Model: M4 Adjustable Carbine Buttstock Assembly Kit Caliber: 5.56 / .223 Rem Stock Finish: Black Includes: Buttstock Buffer Tube Buffer Buffer Spring Latch Plate Lock Ring Available At: GrabAGun