Please help with JG BAR 10 slam fire problem!

[ERIC_H]

Okay well as the title says my JG BAR 10 is now "slam firing". I will go to pull back the bolt to load it and before it would stop like normal, but when you'd go to push it forward it would slam forward and I couldn't shoot. So obviously I was bummed. I've had the gun a few months, and I've put a few hundred rounds through it in case that's important.
I tried doing research on what could be wrong and came to the conclusion that it was the sears maybe being worn down. However I decided to take it to that Gearbox store and see if they could help. Well two and a half weeks later they said for sure it was the piston thats worn down. Now in no way am I saying these guys are bad, in fact I would recommend them wholeheartedly. They're great and their customer service in my experiences are great. I drive from across phoenix just to go there. That being said, I ordered a brand new high pressure piston and its still doing it. This time when I pull it back it just shoots forward.

So please any ideas what could be wrong? I'd rather not spend money that I don't need to again. Although since I now have a high pressure piston and I might need to get new sears, I might just get a higher spring too  

Thanks for your help

[Nerd]

From what i think your saying the problem is i'de say you were right in your first assumption. sounds like one of the sears or the cylinder release.

http://www.airsoftatlanta.com/parts_vsr10.htm

items 1,2 & 4

hope that helps. never opened a 10 up so cant say for sure.

[celcius]

the problem is your second sear. its the sear that holds the piston in place when you slide the bolt back. it is stripped at the tip. for about 22 bucks you can buy a new one at airsoftgi.com since you already have a high pressure piston that should be all that you need to fix the bolt slam problem. i had the same problem and it fixed it right up. just make sure you buy a steel sear though so that it doesn't happen again.

[darkhold]

the plus is that now you have a better piston in it as well, which is always good..  good luck on getting it fixed!