The cap was fixed for the touch gap in the gun (prolonged to kind a "nipple") and ignited through the effects from the gun's "hammer". (The hammer is about similar to the cock identified on flintlocks besides that it doesn't clamp on to just about anything.) In the case of https://lever-action-rifles31840.oblogation.com/18818707/the-fact-about-glocks-that-no-one-is-suggesting