The Stag 10 Marksman Complete Upper comes with a precision machined Stag 10 Upper receiver ready to be combined with any compatible Stag 10 Lower of your choice. Its 22 inch barrel is chambered in 6.5 Creedmoor with a 1/8 twist rate, with a VG6 Gamma Muzzle device, and 16.5" Stag 10 SL M-LOK Handguard. We have designed this Upper for increased accuracy with less recoil to reach out and touch your target. Federal law requires this product to be transferred through a licensed FFL dealer. Stag Arms requires a copy of the dealer's FFL for verification. It's the customer's responsibility to notify the dealer of the order.