Well I got bit buy the 300 BLK bug so I need to make a few changes. This upper runs great. I ran about 120 rounds through it and it looks like it did the day I got it. With a carbine buffer it did not like Wolf ammo but after I put in the Spike’s Tactical ST-T2 buffer it ran 100%. I only ran another 20 rounds of wolf through it but it ran flawlessly. I gotta go with an LMT CQB MRP so I can just change barrels instead of complete uppers. I will let this upper go for $775.00$750.00 shipped. I can take USPS money orders or other forms of on line (discreet) payment. This is nice upper, I just don’t have room for 2 uppers for 1 lower.
