I was at a gun show this past weekend looking for an upper for my Stag lower. There was a guy there who had a whole table full of M-4s with LMG flat top lowers with Delton 16" uppers and 4 pos stock, selling the for $605 (including tax). Seemed like a good deal to me, so I bought one. I wish I'd gottn 2 or 3. I took it out to a range Sunday after church and put about 500 rnds through it. It shot great. I put a cheap red dot on it, sighted it in and it's dead on accurate at 75yds with the red dot and nails at a 100yds with the BUIS I stuck on. I'd attach pics, but it looks like every other standard M-4.