SureFire X200B and DG-18 switch
Surefire’s X200B followed their X200A (above) about a year after the A model was introduced, some time in 2005. Some changes were made to the original A model, which the B shown here incorporates. Look at the above writeup to see the early/original X200A without the changes.
The changes common to current A and B models are:
* Battery cover contacts changed to spring type for better contact – I haven’t had a problem with the older leaf-spring style battery contacts on the A model I have, but I can see that there’s a possibilty that the springs could ‘flatten’ out after a while and provide less pressure on the battery.
* Battery cover retaining pin added – A small clip that inserts into a small hole behind the battery cover release button prevents it from disengaging accidentally.