Pull the grip off, the spring and detent pin should fall out. Take a look at the pin, it should be pointed on one end and flat on the other, someone may have placed a smaller detent pin in the wrong hole. next pull the safety lever out and inspect it, IMO it would be pretty hard to break a safety lever. Look down in the trigger assembly, there could be trash between the disconnector and trigger.
The hammer must be cocked to get the safety back in.
hi perf barrels and bolts
The Nextgen of 308 rifles