Sportsman's Guide has them in stock. Nobody else does. 15+1 magazine capacity of 22lr. Functions and disassembles exactly like any M9. I have several and they have been 100% reliable right out of the box, even with the dirty and inconsistent Remington Golden Bullet 525 bulk pack ammo...
Sportsman's Guide has used Blue Force Gear Vickers slings in the Coyote Brown color for $15 and less if you are a member.
This is a super deal for a sling that goes for over $50 new