PM5 barrelt lossening?

[echo34]

my PM5's barrel (1 piece proto) keeps losening when i am using the marker, is there a reason for this, or a way to prevent it?

 

[Sid Sidgwick]

Tighten it up a bit

 

[bmw]

make sure the `o` ring on the barrel is still intact

 

[Gassy]

Put A Bottle Oring On The Barrel And That Will Sort It.

 

[crackhead]

^That will most likely sort it but there is a remote chance that:


There is too much kick in the gun and it is shaking the barrel out the gun

You're not screwing it in tight enough

You're using the wrong barrel thread or the threads have been mashed.