Tried the new KKM drop in this weekend in my Glock 17 and 17C. The barrel fit and finish was good and it did drop in and cycle well in both Glocks. Reliability was 100% in both. On Sat I fired the non-ported Glock. The KKM was accurate but no more so than the stock barrel. Too close to call but the Glock barrel might have been just a little more accurate. On Sun I tried it in the 17C and it was slightly more accurate than that Glock barrel so I will use it in that Glock.