Well, I went ahead and inserted a c/f mag into the s/f stock well... had to do some minor alterations to the mag well and place some cardboard shims followed-up with liquid, 2-part epoxy to make it all hold properly, but it worked out just fine. If it weren't for the need to make the 450bm's feed properly, there probably wouldn't ever be a reason to try the switch, but it worked nevertheless.
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