This is one of the special kits Kieslers had for sale a couple years ago. Consists of a M4 upper with M4 HG's, 1 in 7 16" M4 barrel, carry handle sights, side sling adapter, funky special tool and offset adapter pin. It is used having been shot 2 or 3 mags to play with. Had a RAS on it before, but not now. Comes with green label Colt AR15 carrier assembly and the original box and bags they shipped in. Looks perfectly new. Sold P/F.