Rock River Arms X-1 Carbine rifle comes out of the box without any changes needed to be made. This rifle has a custom Operator carbine stock, Hogue grip, two stage trigger, winter trigger guard, low profile gas block, 18 inch fluted barrel, Beast muzzle brake, Tro-XL free float rail, and 3/4 MOA accuracy. This tactical long range rifle comes in a Rock River Arms Case with one magazine, LPS-1 weapon wipe, manual, and warranty. Its is optic ready for the shooters choice.