Sons of Liberty Gun Works Stripped Upper Receiver is another piece-of-the-art AR-15 part for a top-class AR build. Having gone through the most advanced manufacturing and testing to ensure maximum compatibility and uncompromising quality, the SOLGW stripped upper is ideal for the most demanding needs in the AR-15 field. It's made of the first-grade 7075 T6 Aluminum billet in a hard coat anodized finish for maximum durability. The Sons of Liberty stripped upper receiver is produced with up to Mil-spec standards of tolerances, allowing for seamless incorporation into any standard AR-15 set-up. It features a top rail in the Picatinny style for mounting a rifle scope or laser and a threaded hole for attaching a buffer tube and an AR-15 buttstock. All the holes and slots on the receiver are precisely designed to fit all AR-15 internals, making the mounting of triggers, trigger guards, pins, springs, AR15 handguards, and barrels fast, seamless, and hassle-free. Getting the SOLGW Stripped Upper is a perfect starting point for any AR-15 users looking to upgrade their existing AR-15s into a reliable and efficient AR-15 build for unmatched action in any conditions.