wow rolling up on 1 year since I first posted this.. I had some time this past weekend to revisit this rifle. The magazine randomly falling out issue is gone.. apparently a weak spring, now it takes a little more effort to release the magazine, but it beats the mag falling free after about 4 shots. I probably put about 50-75 rounds through it this time around.. and noticed no issues cycling the bolt, or feed hiccups. Accuracy with 5.56 is still crap though, I was using LC XM193 (55gr.) and the same 3+ MOA groups that I reported earlier. Lets face it these things do not like 5.56... they prefer .223. When its running properly the rifle is a smooth shooter, little felt recoil and probably a good trunk gun. I would not use 5.56 if your doing anything other then punching paper.. best factory load performance I have encountered so far is Winchester .40 grain .223.