Single fixed S.I.M. sling: The SWAT/IOTV/MTV FIXED S.I.M. SLING-TM is a single point sling which is designed to be attached to an operator's ballistic (SWAT), IOTV, MTV, LBV, or any PALS/MOLLE style vest. The fixed S.I.M. sling can also be used as an accessory to secure a weapon or virtually any piece of gear to a vehicle for rapid deployment. The S.I.M. can be purchased individually or with an adapter.