I'm going to run my new to me T/C carbine in its factory configuration for now, but if I need to tighten the group's up I will definitely look into his forarm hanger system.
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I have two Contenders, an older one and a brand new G2, BOTH had wiggle in them between the frame and Bbl..... grab the gun by the wrist, point it to the ceiling and just wiggle left and right to see if you can hear/feel the 'play'.....
I removed ALL of the play in both by using the BellmTC oversized hinge pin.............. as a result groups tightened!
https://www.bellmtcs.com/bellm/hingepins