Yep, built myself an ultralight on one and love it. Used a pencil barrel J&T kit to complete. The lowers are light, well made and easy to assemble. Only takes a couple of modifications to make it work and both are easy. Comes in just under 6 lbs with an empty mag. Matched the tan stock/receiver with a tan M4 handguard. Email me with any specific questions. By the way this is my 4th AR and one of my favorites.