Thread: svd/tigr "straight pull" to semi conversion?

Hi, I see a lot of companies are selling the svd/tigr rifles with only being a straight pull design. Seems like the gas system has been disabled, either it has a plugged gas block or maybe the barrel port has not been drilled? They appear to still have the gas/piston tube is still there.
Anyone have one and can tell me whats done to them or whats missing?
Thanks in advance