Better than that my man, this is a single barrel but it is very similar and the 12 and 20 are the same in general layout:
http://www.diamondgunsmithing.com/IG...11/IGRC11.html
Ed
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The three Rs: Respect for self; Respect for others; and responsibility for all your actions.
"Is life so dear, or peace so sweet, as to be purchased at the price of chains and slavery? Forbid it, almighty God! I know not what course others may take, but as for me, give me liberty, or give me death!"
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