So far, so good - CMMG 9mm 5in Barrel Barrel and BCG Kit

Took my fresh 9mm pistol build out this weekend to test function. I upgraded from a blowback operated system to the CMMG system in hopes of a lighter, less jumpy and controllable gun for my wife. Unsure of what to use for a spring and buffer, I tried a standard carbine buffer and the heavier spring that I used on previous blowback setup. The spring was too heavy and would not allow the bolt to travel far enough back to engage the last round bolt hold open. I swapped the spring and buffer for a JP enterprises Carbineweight captured spring system. It ran flawlessly after that. There was also a noticable difference in recoil compared to the blowback operated system I was running before. Great product so far.