I need help id'n barrel

[KennyC]

Got this barrel on a real good trade. It's a 45 marked Spain and has a serial nu. has 2 tapped holes on the bottom of barrel like a cva. Has a welded on tennon in the middle of barrel . The brech  has the nipple hole in it ? it does not have a clean out screw   It is a little under 7/8ths and unbreched it is 33.5 in long . Also would the brech threads be metric or sae hope the pics help  thanks  Ken

[Michigan Flinter]

Looks like a Traditions breach plug. The way the plug is made I had all kinds of fouling problems until it was bored out to cal. dia. I beleive the threads are meteric as is the nipple thread.  M 6 X 1. Check the bore for any tight or loose areas . The little .32's shot pretty good we use them at the National Wild Turkey Federations "JAKE " event where there is over 450 kids shooting these riflews.