Hi, I got myself a new V2 KJW M4 and it shoot at 290FPS with propane and 0,20g BB (original valve and blue R-tech hop-up). It cycle fine, but I would like to know why and maybe again some fps since I intent to shoot 0,25g BB.
Thanks
Last edited by Mackie; March 30th, 2014 at 20:30..
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