Trevor discusses why our pistols (and really all mechanical devices) require a break-in period. With the current ammo situation, it seems that the idea of a break-in period has been getting more and more controversial. We wanted to take a moment to address why we require a break-in period, and why it is important in the long run for the function of your pistol.
Technical Tuesday: The Why Behind a Break-In Period

Is the MR920L compatible with extended slide locks ?
Hi, They are compatible, but the extended ones tend to activate when not intended, so our team does not recommend them.