Thread: Tanio Koba / KJW M4 GBBR Basic Information and FAQ
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Old May 24th, 2011, 19:02   #422
Long_Bong
 
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Join Date: Dec 2007
Location: Canada
Hi,

I m considering doing this mod, anyone has tried it that could post a shopping list with material spec (length etc)

Thanks

Quote:
Originally Posted by HKp30 View Post
Top Down Hop-Up adjust





Barrel shim using metal sheets, you can see it fully wraps around the barrel for a very snug fit. Thickness of metal sheets needed may be different depending on your barrel.
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