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  1. Gun Building, Modifications & Repairs
    Hi. I recently purchased a v3 guarder bore up kit. I don't have a caliper on hand and I am wondering what is the proper cylinder to barrel ratio for the said kit if I plan to use .36 bb and m160 spring Thank you!
  2. Gun Building, Modifications & Repairs
    Hi, I've been seeing all over EbairSoft 'bore up kits.' What are they and are they worth getting for M4's?
1-2 of 2 Results