Thanks for the replies. I just cut the top off of one of those little mini kegs and have the innards soaking in it in kerosene. I figure I'll do the brake clean and compressed air thing after while. I never had seen an M12 apart before so I googled it the other night and gave it a try. I took it apart and put it together twice. The first time took forever but I learned a lot and it's easy once you know how. Although the magazine stop gave me fits at first. That little wishbone spring was a lot easier than I thought it would be too. The barrel is marked nickel steel and you're right the modified models are harder to find. I specifically looked for one and it took a while. I'll try it out later this afternoon and see how it patterns. Nothing like a shotgun with 85 years of 'break in' time already under it's belt!