Upper assembly comes completely head spaced and test fired. Ready to drop onto a lower receiver
Other selections are available for upper, bolt and carrier, charging handle, gas tube, handguards, flash hiders, and gas blocks. Please choose from the options listed
NOTE: F-Marked Front Sight Base is not compatible with an A2 Upper due to height compatibility, therefore if you choose an A2 Upper and want a standard front sight base you need to choose the Standard A2 Front Sight Base.
Warning! Always have a competent gunsmith assemble your barrel or rifle kit and headspace your barrel before first use. Using a rifle put together incorrectly or assembled using incorrect or modified parts can result in a damaged rifle, personal injury, death, or damage to property.