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Post by Hak on Mar 29, 2009 18:35:32 GMT -8
Hey guys! I think my M4 classic army is possessed by evil. I loaded 3 different springs M120, M110 and M100. All three springs were chrono between 351 to 367 fps. My intent is to get it under 350 fps for indoor play. Any ideas?
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Post by techk on Mar 29, 2009 18:49:08 GMT -8
according to what you said, I suspect you have compression problems. m120 should give you ~400fps, the m110 ~360-370fps, and m100 ~350fps. So yea...gotta take a look at it
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Post by Hak on Mar 29, 2009 18:52:34 GMT -8
maybe! but GI did my gun and they add m120 for me to get 360 fps. evil gun
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Post by overkill5150 on Mar 29, 2009 20:09:15 GMT -8
might be your airseal......if it failed....your compression drops....it happen to my scar
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Post by techk on Mar 30, 2009 11:14:53 GMT -8
I think it is compression problems since they had to put a m120 spring in order to get 360fps
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Post by jester on Mar 30, 2009 11:39:57 GMT -8
Its not possessed. It just letting you know its time to upgrade to all new internals.
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Post by techk on Mar 30, 2009 11:51:13 GMT -8
dont need to upgrade all the parts, just need to test compressions and if there is any air loss
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Post by overkill5150 on Mar 30, 2009 14:56:47 GMT -8
yeah...but if they are gonna open "her" up......why not upgrade
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Post by Hak on Mar 30, 2009 16:14:53 GMT -8
How do I test the compression?
Here what it had upgrade so far, Systema Aluminum piston head with bearings Polycarb Piston Spring Guide with Bearings Systema spring M100
Only things I can think of are the gear set, the motor and the hop up chamber. That shoudn't effect the FPS
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Post by techk on Mar 30, 2009 17:50:49 GMT -8
I cannot explain it to you in writing, but I can show you in person
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Post by Hak on Mar 30, 2009 18:16:20 GMT -8
I will bring it next Sunday. Thxs!
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Post by jester on Mar 31, 2009 10:28:41 GMT -8
I'll see if we can take a look at it this weekend.
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Post by Hak on Apr 6, 2009 17:40:58 GMT -8
I am going to shim my possessed M4 tonight. May the force be with me
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Post by Hak on Apr 8, 2009 15:58:58 GMT -8
everything went well, it is shim correctly with m100 spring. FPS 330-349 16 RoF
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Post by Nades on Apr 8, 2009 20:38:26 GMT -8
look we have another person that can work on guns now...lol
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