« on: November 09, 2007, 04:32:06 AM »
instead of a m120 use a PDi 150% (m110). The m120 + tighbore will put you over 400fps.
and look into a metal receiver.
-Maybe a ICS style receiver?
edited: my bad
Not true, I have a M120 with a Madbull v.2 tightbore in my M4 and Sp110 spring with Prometheus tb in my M16 and both with perfect airseal and it still shoots in the 380 range.