This upper features a 24" Krieger 1/7.7 twist SS barrel. Barrel is .920 at the muzzle. Krieger float tube with handstop and QD sling swivel. Accuracy Speaks front sight base/riser. This upper has about 2200 moly coated rounds through it. It has been treated with TLC. Includes the pages from my log book documenting the rounds fired. $ 485.00 deivered to the lower 48. MC/VISA/MO.