Bushmaster lower, six position stock, 16 " 5.56 M4 ramp flat-top upper with gas piston operation. Excellent rifle that doesn't crap where it eats. $800.00
Looks like a good rifle, what is the twist on the rifling? Chambered to fire 5.56 and .223? Whose Upper receiver? Wish you lived next door.....
I don't have a freaking clue who made the gas system, bought what was best recommended by a dealer/friend. I built the upper on a Spikes receiver, I think. barrel is 1:9 ran a few mags through it and it function flawlessly.
It's a well built piston AR with only a few mags fired through it at half the price of any othe quality piston rifle I have seen, not fancy but built out of the best components I have and I own more rifles than most folks. There"s 1200.00 in parts in a 800.00 carbine, do the math and buy the damned thing or not.