Rugster---You should't be able to slide the gas block back & forth but just alittle bit. The gas bushing connects the barrel to the gas pipe & in effect holds the gas pipe in place (Keeping it from being a projectile aimed right back at you). I would disassemble the gas block & verify the fit of the gas bushing. It should protude above the gas block just alittle to fit into the recess machined into the bottom of the barrel. If you can move the gas block fore & aft without resistance you have a problem that needs to be fixed.
Good luck
Bushwack
Good luck
Bushwack
