I been using a m4 cylinder with my .50 which has a psg-1 tightbore length barrel. Seems to work alright. Chronos about 415-420.
At first I put tape and stuff over the ports but the last time I had it apart I didn't bother.
Anyhow I have a full cylinder I plan on putting in it sometime I take the gearbox apart for maintenence but I not going to do it till then.
anyhow maybe I am getting the dreaded suckback but if I am I certainly don't see it. Don't want the gun shooting much hotter anyhow. hehe
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