jonjon

Thank you guys for the quick replies! Gonna have a look at the gun as soon as possible and will post an update

Hmm hammer spring sounds logical, because it sounds like its not shooting at 100% power and the bolt moves kinda slow even in semi mode. I havent looked in detail on how the trigger assembly works but gonna try and see whit my gbb-mechanic-noob-eyes if something is wrong with the spring

Hey guys Im new on this forum and this is my first post! Since english isnt my first language its kinda hard to read through 5000 posts, so i ask here for some help/advice so here it goes: I have owned a kjw m4 for some time now (not so much skirmishing, mostly backyard shooting) and recently i bought a second kjw m4 (super deal, couldnt resist lol) but the new gun doesnt work right, the gun doesnt cycle properly, it short strokes and sometimes the bolt only moves like 0.5 cm and vents the gas. i thought the problem was gas leaking in the bolt, hop up or something in the upper, but it tu