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Over 400fps LM4


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#1 BoobieM4H

BoobieM4H

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Posted 03 June 2012 - 08:39 PM

ive installed a kjw m4 (yes kjw, not ksc) npas made by ra-tech. a buddy of mine at W.A.R. Custom Tactical hooked it up. with a little bit of modification in shaping the npas similar to LM4 rocket valve it brought my velocity to around 450fps and adjustable to around 400fps.






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