A question. I recently bought a Sub2000 a few months back and bought some of the mcarbo upgrades. I haven't shot it yet but noticed while I was function testing after everything was done that unless I pull the bolt back very quickly and firmly it does not seem to draw back the hammer and fire. If I slowly pull it all the way back and let it ride home it is not cocking the hammer for some reason. Is this normal or is there something wrong with the install? Thanks for any info.