Adammd209 Posted January 1, 2014 Posted January 1, 2014 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
Mike636 Posted January 1, 2014 Posted January 1, 2014 I had one and they are toss to be honest, I installed a Prowin CNC hop up chamber and it added around 50 FPS so the airseal on my old hop up must of been terrible. http://m.ebay.com/itm/181124160080
Mike636 Posted January 1, 2014 Posted January 1, 2014 It took about 20 minutes of gentle sanding with my Katana I'll take a picture when I'm home.
Wojtas Posted November 13, 2014 Posted November 13, 2014 Hi, I bought prowin hop up chamber and I have a problem to fit it in my WE Katana Raptor. Thanks for any suggestions how to adjust (sanding) the chamber. Wojtek Mike636 1
Mike636 Posted November 14, 2014 Posted November 14, 2014 I'll take a few pictures tomorrow for you but it's mainly the front block -
Wojtas Posted November 14, 2014 Posted November 14, 2014 Thank you very much. I'm newbie and I do not want to damage the chamber. Your pictures will be very helpful!
Mike636 Posted November 16, 2014 Posted November 16, 2014 You dont need to take too much off, just a little at a time. Get it chrono'd when your done mine gained about 50fps
Wojtas Posted November 16, 2014 Posted November 16, 2014 Thank you very much! Tomorrow I get down to work... I hope I can get a similar increase. I'll let you know how it goes
Recommended Posts