Thread: Dytac VIS-1
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Old September 28th, 2010, 19:16   #3
Qlong
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Join Date: Jun 2007
Location: Scarborough, Ontario
You need to shim the bolt key and bolt carrier, and add some material to the bolt stop, the larger inner diameter of the uppers were actually made for PTW cylinders which are a bit larger than WE spec.



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