Spiggy, on 20 January 2011 - 11:49 AM, said:
Because it's a non-import model it's difficult to say what in the bolt is different. Certain guns have different piston assemblies for their respective regions. A good example is the early MP7s which have the largest variations for their regions. Some are for weaker gas only, 1j power only, some are 400FPS, and some have disabled automatic features.
It's a Japanese KSC Series 7 model (based on the box and included manual and paperwork). It has the magnesium bolt and the replacement NS2 outer tube I bought from KWA USA is an identical replacement part. The repaired M11, including the new 6.03 upgraded barrel I installed now works great except for FPS. The FPS still seems slow relative to my stock KWA USA M93R NS2 version. Could it be the M11A1 mags are Japanese versions with more restrictive release valves?
I just want my M11A1 to shoot as hard as my M93R. As an example, my M93R will shoot through both sides of a standard cardboard box and will also pierce an aluminum can at least one layer, sometimes going through the entire can. On the other hand, The M11A1 will pierce one side of a standard cardboard box both not through both sides. With a can, some of the shots may just pierce the can, but most of the times, it will dent the can and ricochet. Temp is in the 70s with the mags are fully filled with Propane and warmed to room temp. This is with 0.20 g airsoft BBs. Sorry, don't have a chrono to be more scientific... ;-) I've already spoken with KWA USA tech and have gone through all of the troubleshooting (e.g., properly oiling valve seals, cleaning oil off hop-up unit, ensuring bolt moves freely and quickly, ensuring outer tube moves freely within bolt. The M11A1 has an incredible fire rate without any jams so it's functioning properly. Just the FPS is bugging me...
Thanks in advance for any advice!!!