errr you've kinda contradicted yourself its still one of the 5 just means either the grey parts (grip frame, reg housing, clampneck arm, barrel back too if i remember right) were re-anno'd or swapped over, id slightly tighten the trigger bearings and slightly screw in the grub screws towards the magnet at the top of the trigger and towards the microswitch roo as when my mate own that marker prior to chaos86 it felt like slightly too much lateral play in the trigger an lil too far on the pull when my mate had it 4 months ago.