Just put together this 20" HBAR AR15A3 rifle. Always wanted a "classic" looking 20" M-16 clone. PSA A2 lower, Delton 20" HBAR A3 upper, spare A2 sight/handle I had, and a M16 BCG. All the parts' color match pretty well. All for less than $600. Took it out to the range for first time today; while the HBAR barrel IS noticebly heavy (I have 3 other 16" carbines ARs), it certainly stays steady, and I noticed that the groups didn't open up much at all after volume of fire that would've heated a carbine M4 profile or lightweight barrel up. It is pretty darn accurate; that group is 5 shots at 75 yards using the irons and shooting cheap Russian steel cased 55 gr FMJ ammo. The one high shot flyer was user error. The PSA stock trigger is good for milspec. Functioned flawlessly with no FTF/FTEs with brass and steel ammo. Super fun rifle to get back to basics with.