thanks Klickteryx and Jimbo!!
I'm much clearer now;
PM has no matchlocks
mine was a PM flint-lock blunderbuss
PM civil war Red coats are using percussion rifles
I do want mine to be matchlock(arquebus?)
so playmoebius' and Jimbo's examples are PM-like to me, which are what I like to imagine mine as.
someday I might trim my flints smaller and let them pass as the match or the matchlocks
as for the wide barrel ends...just think they are exaggerations like klicky heads and helmets until someday PM makes a matchlock