DS Arms ZM4
The lower receiver is a DS Arms (DSA) ZM4. Since this was purchased used, I'm not sure if the upper receiver is also DSA or something else, since there are no markings on it (except for the square forge mark). I'm not even sure what type of stock this is. The fore-end is Magpul.
I haven't gotten around to shooting this yet, although I will post updated pictures if I do (now that it's almost summer).
No box, no paper, no other accessories. If I find one of my spare MBUS rear sights lying around, I'll include it, but I'm not promising anything.
Try as I might, I just can't get the safety lever to turn all the way . . .