The CMMG BANSHEE Mk10 AR-15 8" CM 10mm Upper Receiver w/ EML7 7" M-LOK Handguard is a radial delayed blowback-operated receiver group featuring 6061-T6 billet aluminum construction with a Cerakote finish for maximum durability in a lightweight package. The salt bath nitride-finished 8" 4140 chrome-moly steel barrel boasts a 1:16 twist for superior accuracy with most 10mm loads, and the factory-installed ZEROED compensator (.578x28 threads) drastically reduces felt recoil and muzzle rise for a softer and flatter shooting experience. The free-float handguard offers multiple M-LOK slots, providing ample attachment space for weapon lights, laser sights, foregrips, and other M-LOK accessories (not included). It also includes a ZEROED charging handle and a complete/assembled bolt carrier group. Compatible with most multi-cal AR-15 lower receivers. Lifetime warranty. Made in USA.