Alright guys I have had my kjw m1911 for about 4 years now and it has been my go to side arm for almost every event and it has taken my abuse as it comes. So it now has a problem when the gun blowsback sometimes* the slide won't return all the way I have looked at the problem and I believe it may be the nozzle is not returning fast enough and so it gets caught up on the magazine lip. Now is the fix to my problem as easy as getting a new spring set including the recoil and nozzle spring or is the problem something else entirely? Also while I have you guys here the fps has dropped considerably over the years it now only shoots about 280fps can I fix that with a new piston head set? Thank you in advanced.