Overview Reviews Product Description .68 Cal Gen 1 eNMEy: Oring for inside the Bolt Stop, and Vertical Reg Piston..68 Cal Gen 2 eNMEy: Both above and Bolt Bumper Oring Product Videos Custom Field Product Reviews Write a Review Write a Review × GOG - Oring - OM7014 Millable Urethane Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *