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Post by roninswd on Jan 21, 2007 17:38:41 GMT -5
Ok me and a friend have CA M4s (stock). We want to upgrade the springs to 400 FPS. We want to know how to do this b/c we don't want to FUBAR our AEGs. Please respond with step by step instructions if you can! Thanks
Ronin
Steel Wolf Detachment
Enterprise
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Post by mongoman on Jan 22, 2007 0:41:54 GMT -5
For 400 fps all you need is a systema m120 spring and a 9.6v batt. That should do it, and the CA stock gear set will handle it for quite some time. I have a CA m15 CQB, and that did the trick for me.
M
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ghost
Corporal
Posts: 131
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Post by ghost on Jan 22, 2007 21:06:50 GMT -5
I did the PDI 170% in my CA m4 and getting a tightbore and that should be in the 400 range.
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ghost
Corporal
Posts: 131
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Post by ghost on Jan 23, 2007 18:04:26 GMT -5
Did some better research....The M120 and the PDI 170 are almost the same in FPS...from 375-405 depending on gun setup. The PDI springs are not as tight a spring to compress as Systema springs but give near same results. The PDI spring is easier on gears that are stock where the M120 it will take better quality gears in order for them to last. CA now install reinforced gearboxes and high grade gears in their guns like the CQB and the M15a4's and will easily take on either spring with no problems to the gears but like mongo said the 9.6v battery is a must.
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Post by The Shootist on Jan 23, 2007 19:14:16 GMT -5
The biggest thing is to make sure you have a 4th generation CA. It's more complicated to do this upgrade if you don't.
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mateba
4/20 K AAV & Steel City Airsoft
Posts: 426
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Post by mateba on Jan 23, 2007 21:03:09 GMT -5
by generation you are refering to the "A4" as in M16A4 or the like
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Post by The Shootist on Jan 24, 2007 11:43:48 GMT -5
That is correct. It's not actually their fourth generation; but they call it an a4, so it gets called 4th generation.
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Post by skidude on Jan 24, 2007 22:11:24 GMT -5
The PDI 170% springs are very popular upgrades for M4 CA AEGs.
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