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CA M15A4 Low FPS
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TrainsCDG
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Join Date:
Mar 2012
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#1
CA M15A4 Low FPS
28 November, 2014, 23:05
High guys
I bought a 7 year old Classic Arm M15A4 from my local airsoft shop monday. I found that I needed to replace the piston which was missing teeth and the spring which used to be a M100 but had been cut. When I took it in today the FPS registered as 0,0,174,175,0,174,0,175. It was a bit confusing what this meant and looks to possibly be a problem. The range is also really terrible but accuracy is fantastic. I have looked for solutions but the answers don't help. Anyone have any ideas? I really want to get this working as it is a fantastic gun.
Lee 303
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#2
29 November, 2014, 14:12
Re: CA M15A4 Low FPS
Did you check the compression when you had the gearbox open
I would have replaced the piston head O-ring as a metter of course to ensure compression way 100%
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TrainsCDG
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#3
29 November, 2014, 21:57
Re: CA M15A4 Low FPS
It was a brand new piston bought the same day. I have also fitted a new motor, hop up and hop rubber. I will check the compression next time I can open it (going away for company training for a week).
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Lee 303
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#4
9 December, 2014, 17:41
Re: CA M15A4 Low FPS
The O-ring is part of the Piston head and most pistons come without the piston head attached
Did you re-use the old piston head with its old O-ring ?
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