[durtboy17]

Hello fellow snipers.. I recently purchased a metal trigger box for my MK96... I was excited to say the least due to the fact the stock one was falling apart.. However, upon chrono check-ins yesterday before a scenario game, I realized the trigger had taken 125 fps away... Not to happy about it... So now what do I do next?? Is there any way to get the fps back I once had?? Or do i need to upgrade my spring?? Which I already have.. Is there a certain part in the trigger mechanism itself I need to replace and or adjust?? Any info or input will help.. Happy sniping

 

[dulas]

Sorry but if I understand correctly you have 125 fps difference because you changed the trigger??? ???

(English is not my mother language so I often misunderstand the meaning)

 

[MGunner]

Thats impossible. Take the gun apart, clean, regrease and teflon tape it and you should be back to normal.

What did you buy for a trigger unit? Because if it came with a metal piston, and you has a plastic one, that cold explain your problem.

 

[aydonmill]

Yes I hate to say it but that seems impossible. I think I bought the same replacement trigger for my MK96 (was it $30?) and my FPS stayed exactly the same as it was.

Take it apart and put it back together again. Maybe you changed the spring and forgot about it?

 

[durtboy17]

Yes, the trigger box was around $30. I have an aluminum piston and an m170 spring. However I'm learning that it might possibly be the o-ring but I'm baffled by the fact such a small part could have a huge impact on performance. Mgunner, what part should I teflon tape? I have a PDI hopup and I've heard of guys taping their stock hopup units to decrease air leaks. Could my hop up be leaking possibly? I just bought it along with a repair kit for it. But like I said, most claim it to be the oring on the piston.

 

[MGunner]

Tape around the threads on your cylinder head.

 

[WorstInFinlanD]

Also tape the hopup bucking.

 

[MGunner]

I almost put that, But im not sure if you can do that with a PDI chamber.

 

[Cheese Man]

You don't need to, but you can. The PDI chamber has just about no blowby, so it really isn't an issue.

 

[durtboy17]

Ive always tapped the head and it still had the decrease. Im replacing the o ring today so I'll find out soon if that was the problem.

 

[durtboy17]

I took apart my bolt only to realize that my cylinder head has a groove cut out in from from one of the bolts on the hop up backing out. Would that be the cause of the loss of fps?? If so where can I find a replacement cylinder head for a utg mk 96??

 

[headline]

Do you think you could take a picture? Because its kinda hard to understand.

Thank
Headline

 

[durtboy17]

You know the piece of the head that slides the bb into the hop up? On the MK96 it is made of bronze I believe. There was a screw backed out on my pdi hopup and everytime i pushed the bolt forward, it would rub on the screw thus leaving a groove carved into it. However, I filled it with epoxy and sanded it and it seems to have helped. Lesson learned: If you have a pdi hopup put some thread lock on the screws that adjust the arms. They tend to back out over time. Kind of aggrivating if you ask me. I feel like putting the stock one back in because it was a little more reliable. Not accuracy wise, but the fact I dont have to worry about it while Im in the field. -Happy Sniping

 

[Cheese Man]

For reference, that piece is called the cylinder head. I am glad it all worked out.

 

[durtboy17]

Yes I know.. I was explaining to headline so he could better invision it..