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  1. Hi, Has anyone experienced problems with m4 hop units? In the way that when I try and set the hop correctly in order to make the bb fly straighter, the bb tends to more or less drop out of the end of the gun! Does it need time to bed in? Only put about 300-400 rounds through it so far. It's ok when I wind the hop off but like I say, the range isn't great. Also when I put it through the chrono, it was achieving about 250-260 fps with .20 bb's which doesn't sound too great! Cheers Adamd209
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