Hoping for more input
Barrel is 26 , .6 at muzzle 3 grooves. Dont know if you guys saw my link to pictures with markings
https://share.icloud.com/photos/0jwZFawvIP8A7k59pafqFdnaA#Home
Hope the link works
The mark under the JP at the front sight looks like a round bomb with a fuse burning
Jerry