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Old May 9th, 2009, 15:47   #3
canadian guy
Join Date: Oct 2006
Location: Barrie
Version 2 gearbox's are probably one of the most common. Followed closely by the newer Version 3 gearbox which is not compatable with all rifles.

M4's and M16's run on Version 2s.

Correct me if I am wrong.

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