O-rings would require lubrication of something like Tri-Flow. This might tend to collect more debris, depending on how often you clean the top tube and bolt causing more breech wear as well.
They must of not been thinking when it came to the triple detent slotting.
Originally Posted by freebird
lube the shaft and warm the o-ring up in your hand by rubbing it back and forth between hands. then it should go on easier.