It's one of those little things that can stop your training dead in it's tracks. Hand held dummy launchers (like the RRT) don't work very well without the O ring. The O-ring is what keeps the gas inside that is created by the load and it shoots the dummy in the air.
I have seen o rings last for years and I have seen them fail in weeks. Always keep a few spares on hand to replace yours as needed.
Bought the o-rings for the launcher to have extras, since I wasn't sure how long they lasted. I bought the launcher because I broke my leg in a hunting fall and was in a cast. I could operate the launcher, and my dog can retrieve and loves the extra training. Since he's an upland dog, pheasant mainly, dokken needs a pheasant dummy for the launcher.
Product Rating: 5 out of 5-stars. Review ID: 6621 Reviewed:
GUN DOG SUPPLY - "Serving Hunting & Field Dog Owners Nationally Since 1972."
Order online via Secure Server or call 1-800-624-6378 to order! GDS Warehouse, 17645 U.S. Highway 82, Mathiston, Mississippi, 39752 USA.