Nice upper - CMMG Mk4 9mm Resolute Upper Group Receiver

I purchased this upper for my Banshee lower. The colors are both midnight bronze but they dont match. I really dont care about that as much as I care about function. The upper is well built as all CMMG's are. I have only used it for 50yd shots so far but I want to see what the 9mm will do at 100. I had a cheap optic on it and was still able to put 10 rounds in an inch at 50. Ordered a new optic to go to 100. It cycled very well with it failing to lock on the last round only one time on the first 30 round mag. I ran 250 rounds through it. I'm running a POF trigger with a KynShot 5007 hydraulic buffer, A5 buffer tube, and Tubb 556 flatwire spring in the lower. All this makes this gun a real soft shooter. I recommend this upper to anyone wanting to reach out a little bit with 9mm. No muzzle rise and a soft shooter makes this an excellent gun for beginners.