1) Is it a standard SB1 or SB2 receiver or is it it's own animal? (Looks like a SB1, Shotgun)
2) Is the firing pin round like that of a shotgun or centerfire rifle firing pin or is it square like most rimfire firing pins? (It's the same size and shape as a Shotgun)
3) If it is round is it large like a shotguns or smaller like a centerfire rifles? (Same size as a shotgun)
4) Has anyone out there used a Versa Pack .22 barrel on a standard SB1 frame for more than just a hand full of shots and what have the long term results been. (i.e.; any damage to the firing pin or transfer bar, etc.)? (NO, I have not)
Brett,
I hope this helps. Tomorrow I can send you pictures. I just purchased one for my son, about three weeks ago. We have just shot the .410 barrel. I have SB2 and SB1 frames and the 22 rimfire fit them, but have not fired the .22 with them. The forearm is tight to get back on, the barrel screw hole doesn't aline.
Froghunter
PS: Brett I'm here for you, if I can help!