M16 AR15
I've been working on this rifle for several months now.
Started with a slab-side, non-FAD, 1975 Colt SP1, which came with an A2 buttstock (shown), an A2 grip (replaced with A1 shown), a black nylon 'silent sling' (replaced with M1 Garand-style OD cotton web sling shown), and a standard 20-round...