Shims are one of the smallest pieces in the gearbox, but they are also the most important. Shims are responsible for spacing the gears properly to avoid uneven and premature wear. An improperly shimmed gearbox is doomed to failure. In order to shim a gearbox precisely you need precision shims, and Modify has just that. These shims are precision cut for exact spacing, with these shims, the only thing else you need is precision tech to do the work.
Does just what it needs to do! Worked great as far as I am concerned. My Mp7 needed one serious shim job, now it shoots awesome (with the help of some other upgrades (That were not available here))
good price: works as advertised.
2007-09-04 19:18:28 N. KISH verified buyer
For: Modify Precision Shim Set
I'm being a bit critical here, I mean they're shims... nothing more than precision made washers, but me being a machinist I just had to gage the accuracy of the shim by measuring them. they are very consistent in thickness but some have a .003" lip on the inside hole. it may not seem like much, its only as thick as a human hair, but it can make a small difference.
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