Original Bob Sled CZ-527 Single Shot Magazine fits CZ527 AICS

Original Bob Sled CZ-527 Single Shot Loading Mag
  For bolt action rifles, the CZ-527 Bob Sled provides a single shot loading bed or follower to allow the easy loading and firing of single rounds during competition, benchrest , or varmint shooting. Works with CZ-527 bolt action rifle ammo. Made from durable, long lasting Delrin® to ensure a lifetime of use, the Bob Sled simply replaces your magazine to allow easy loading of single rounds. The CZ-527 Bob Sled works with the Accuracy International, Oryx, MDT, and rifles that use the Badger and CDI bottom metals that accept Accuracy International (AICS) magazines.
- Some Fitting MAY Be Required - The CZ-527 Bob Sled seems to fit everything without modification. But every once in awhile a customer will call and say it won't fit or latch in his AICS compatible mag well. I spoke to Bob Hanin about this and he said the little aluminum retainer catch was made a little long to be sure it could fit the wide variety of AICS compatible rifles. So, if your magazine is not latching, you can file just a little bit off the tip of the catch and that will solve the problem.