Do not modify the action in any way. All mods have to be made to the barrel lug. I know that shotgun barrels can be fitted to rifle receivers but rifle barrels can not be fit to shotgun receivers. Your is a 12 gauge Topper 88 old style and most likely will only take a shotgun barrel or a black powder barrel. Improper fit is extremely dangerous to the shooter.
I have an SB1 receiver in 357 mag. It would take a 20 gauge but that is about it. the 44 mag is an SB2 and would take a 12 gauge. My son has a 30-30/20 gauge and it would accept some other barrels since it is a rifle receiver.
Patron Member NRA
"I would not be an old man if I had not been an armed young man." JTJ
I was taught to respect my elders but they are getting harder to find.
Last edited by JTJ; 01-10-2017 at 05:18 PM.