After briefly using it, to me it feels like a bad K-121.
The clip is nearly half the size. Apparently it does less damage? The recoil is harder to control. It has worse iron sights, and ROF feels about the same. Hipfire accuracy is shocking.
Maybe I need more time to get used to it, but I am a huge K-121 fan and always have been, so I am used to hard hitting, slower ROF's with high recoil, but this new gun just feels terrible to me.