Check the listing for details. Vector Optics .223 Remington Snap Caps w/ Sling. Color: Red, Condition: New. Listed at 14.00 USD. Vector Optics .223 Remington Snap Caps with Sling Product Info for Vector Optics Snap Caps w/ Sling: Totally Safe. A snap cap is a device which is shaped like a standard fire-arms cartridge but contains no primer, propellant or projectile. Snap cap is designed to be a fake cartridge from the very beginning.It serves the same function as a dummy round, but different in that a dummy is usually made from a real cartridge with its propellant and primer removed (still has the projectile and the casing). Specifications for Vector Optics Snap Caps w/ Sling:Fabric/Material: Silicon, AluminumColor: RedFinish: Anodized Features of Vector Optics Snap Caps w/ Sling:Totally safeFunctions just like real ammo - without the noiseOffers versatility: training, storage, testing, practiceThousands of dry fires without damage Package Contents: Vector Optics Snap Caps w/ Sling