cowcow glock m6 buffer kitCowCow M6 Buffer module kit for Glock. You get 4 x 2 of the different rubber rings that take some of the shock that comes from the sled every time it moves back and forth. It's actually a way to adjust recoil for the discerning airsoft player. They fit 6 mm guide rods. Please note that the original cannot use the kit here
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