SKB semi auto not cycling

4T4MAG

New member
I have an SKB semi auto that will not cycle from one shell to the next. I have cleaned the whole interior. It used to cycle with some high brass instead of light loads. Now it will not cycle at all. Any ideas?
 
I believe I have the gas system assembled properly, according to the sch. I will take it apart again and make sure.
 
Mine has a selector switch under the fore arm for light or heavy loads. Is yours set for heavy loads when using target loads?
 
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