Re: AI AX 50 with 5x25 S&B MSR is here!
Coldbore,
The "dots" on the AX50 receiver and bolt are gas ports. In the event of a ruptured case, the red disks blow giving the gas a very large path of least resistance.
These are very effective. We have seen a couple of instances with defective military cases having head separations were the disk all blew out as designed and there was no damage to the rifle or injury to the shooter.
Regards,
-Scott