Maxpedition Modular Universal Holster 3501BBlack. Attaches with hook side velcro to loop velcro sewn in various Maxpedition packs. 2" retention strap can be adjusted for a snug fit to your weapon. Works best with the following Maxpedition products: MX211 NeatFreak Organizer, MX403 FatBoy Versipack, MX408 FatBoy S Type Versipack, MX409 Typhoon GearSlinger, MX410 Monsoon GearSlinger, MX412 Jumbo Versipack, MX413 Jumbo S type Versipack, MX512 Condor II Backpack, MX513 Falcon II Backpack, MX514