ORING-1/4" Cold Weather
O-Rings are vital components to the MagBlock Safety & Performance Devices. The 1/4" Standard does securely fit the MagBlock into many weapons, however in certain cases you may need to add additional o-rings to make sure the MagBlock is secure in the magwell of your specific weapon.
The 1/4" Cold Weather allows for use in cold weather applications where there needs to be more flexibility due to climate changes.
NOTE: Does Not Include MagBlock