Wilson Combat Multi-Cal Single-Side Safety Selector Black. This single-sided USGI pattern safety selector is made from sophisticated sintering and coated in a sturdy black nitride finish that repels wear and corrosion. Plus it's compatible with any AR/AR-10/AR pistol caliber carbine that will accept a USGI-style safety for an easy installation process Get the perfect upgrade today and take your AR to the next level. Single side Drop-In replacement for standard mil-spec selectors Black nitride finish for wear and corrosion resistance Multi-Caliber Specifications for Wilson Combat Multi-Cal Single-Side Safety Selector: Manufacturer: Wilson Combat Color: Black Features of Wilson Combat Multi-Cal Single-Side Safety Selector Upgrade any semi-automatic AR platform with the incredibly durable Wilson Combat AR Safety Selector. This single-sided USGI pattern safety selector is crafted from precision sintering and finished in a hard black nitride coating that resists wear and corrosion. Package Contents: Wilson Combat Multi-Cal Single-Side Safety Selector Wilson Combat TR-SS-B: Multi-Cal Single-Side Safety Selector Black