It's been a while since it was done, so I can't fully remember but when I bought it the replica had an fps variation of about 150, it was all over the place and had a massive air leak problem. I'm sure it was a one off lemon case, but I sent it back and they replaced the nozzle, hop up rubber and something else and now it shoots bang on 342 with 0.5 variation up or down (On .2g) - They replaced oem parts with oem parts, by the way.