Originally Posted by
premierpistol
The split nylon spring guide is unlikely to be the issue but it wont hurt for it to be removed, its design function is to prevent any spring resonance upon firing, it is split to allow the spring to expand during cocking so theoretically, it would need the internal edges to be chamfered as opposed to the external edges??
graunching upon cocking could stem from roughly ground spring ends? or from the contact area of the cocking dog screw that is fitted to the cocking bolt, as it slides along the slot on the underside of the breech housing, if there is any crumbs of crud or grit in there, they will get picked up by grease or oil and dragged up and down, making for some truly horrible cocking effort.