Mark it down to carelessness, but I managed to break the snap ring which holds the bolt guide in place on an early L46. If anyone knows of a source for a replacement snap ring I would be exceedingly grateful. However, the bolt seems to work just fine without the bolt guide. So far as I can see, the primary function of the bolt guide is not to actually guide the bolt (keep it from binding, which it may help with), but to serve as a block for any gas escaping the action from a failed primer or case. Am I mistaken in this observation?