Airsoft Canada - View Single Post - ICS RIS M4 semi-auto prob. Cut-off lever?

AirsoftTechGeek · April 9th, 2006, 23:26

I have had my ICS M4 203 RIS upgraded with a CA 170% spring, spring guide w bearing and reinforced bushings as well as a shim job. The gun works ok for over 8 month until recently it had some problem with firing in semi-auto.
It appears that the cutoff lever is catching the trigger and preventing it from firing in semi auto. Almost like a timing issue when the gear is open, I fire the rifle in semi and the trigger will get stuck on the cutoff lever which cams up and down as the gears turn.As soon as I switch it to full auto its fine for a while but sometimes it wont work in that fire mode either. I found that pushing the forward assist would get the rifle to work again but sometimes I have to open the upper to reset the timing. Any help will greatly be appreciated.

April 9th, 2006, 23:26	#1
AirsoftTechGeek Banned Trader rating Join Date: Apr 2006 Location: Minnesota, US	ICS RIS M4 semi-auto prob. Cut-off lever? I have had my ICS M4 203 RIS upgraded with a CA 170% spring, spring guide w bearing and reinforced bushings as well as a shim job. The gun works ok for over 8 month until recently it had some problem with firing in semi-auto. It appears that the cutoff lever is catching the trigger and preventing it from firing in semi auto. Almost like a timing issue when the gear is open, I fire the rifle in semi and the trigger will get stuck on the cutoff lever which cams up and down as the gears turn.As soon as I switch it to full auto its fine for a while but sometimes it wont work in that fire mode either. I found that pushing the forward assist would get the rifle to work again but sometimes I have to open the upper to reset the timing. Any help will greatly be appreciated.