<p>Includes: AR15 Stripped Upper Receiver in Anodized Black AR15 Gen 2 Stripped Lower Receiver in Anodized Black Upper Receiver Features: Platform: AR15 Material: Machined from 7075-T6 forged aluminum M4 Feedramps .250†takedown pin holes Works with standard AR15 components Lower Receiver Features: Platform: AR15 Material: Machined from 7075-T6 forged aluminum Markin”Cal Multi” Upper Tension Screw Flared Magwell Rear takedown pin detent hole is threaded for a 4-40 set screw Works with standard AR15 components and magazines</p>