Sighting in for deer season mounted my nikon prostaff everything went well there, bore sighted it at 15 yards set up at 100 fired three shots gun quit cycling thought it was cheap ammo (prvi partizan I have and shot before with no issues) switched to Winchester power point and still wouldn't look at the font of my gun and there's the gas block dangling. Got it sighted in single shooting but now I need to track down a gas block by Friday morning.