Quote Originally Posted by athomas
Adding a shim helps with bolt stick only if the gun chuffs and won't reset properly. Shims usually don't help when the gun won't fire at all. That is generally caused by a carrier that is too tight. Remove all the shims, increase your carrier size until you can use the largest one that doesn't leak. Always use the same carrier oring that you have been using. You can then add shims again once you find the proper carrier size. If you increase the carrier size with shims still installed, it can leak due to too many shims even though you have the proper size carrier.
Thanks again, I will try this and see what happens.