Pmr

[PB Charlie]

Hi ive got a PMR and i know there not the most reliable guns but there usually reasonably easy to fix but this time its not.

It fires of about 80 shots that are all good and then the next time you try to fire the air isnt coming through and they just roll into the barrel. IVe taken it all apart and cleaned and lubed the bolt. That didnt work and ive also checked that the velocity is fine when it is firing and that is fine. Also all the oring are good.

So if anyone has any suggestions as to what it could be then theyd all be much apprieciated.

 

[Ash - GI Sportz]

It sounds like the back cap is un screwing itself as its firing..

Try replacing the o-ring on the back cap.

Ash

 

[PB Charlie]

It sounds like the back cap is un screwing itself as its firing..

Try replacing the o-ring on the back cap.

Ash

thaks but i dont think its that because the back cap was screwed on all the time and it wasnt undone when i came to clean and lube it and i took it apart and lubed it on the day i was playing with it and screwed it back on aftter that and it didnt make any differance (and i changed all the o rings)

 

[CRASH]

I had the same problem with mine mate and i just changed the back cap o-ring and made sure there was no grease on the back cap thread and this solved the problem for me.
Mine never felt like it was loose either but it turned out to be the problem.

 

[PB Charlie]

kk but is this the o ring that is just in front of the back cap threads or the one that sits just inside the back end of the bolt?

 

[CRASH]

The one on the actual back cap mate.

 

[PB Charlie]

k il do that thanks for the help i hope it works
But if anyone has any other suggestions then plz go ahead and post them

 

[PB Charlie]

thanks

thanks for that guys it worked However after i had finished firing it was still unscrewing and i had changed the o ring and made sure there was no lube on the back cap threads so it shoulnt have been. Do any of u know any other ways to stop this?

 

[Ash - GI Sportz]

I would recommend upgrading to the aluminium back cap for your PMR.

Check with your preferred DYE/Proto dealer for pricing and availability.

Ash