Sniper Castle Nut Wrench for AR 15 .223/5.56 Steel Black. Sniper designed this Castle Nut Wrenches to easily remove or tighten a castle nut. For optimal ruggedness and reliability the Sniper AR-15 .223/5.56 Castle Nut Wrench is constructed from steel. Safely make modifications to your firearm when equipped with this Sniper Rifle Castle Nut Wrench. Specifications for Sniper AR 15 Castle Nut Wrenches: Manufacturer: Sniper Color: Black Caliber: 5.56x45mm NATO .308 Winchester .223 Remington Weight: 1.4 oz Gun Type: Rifle Fabric/Material: Steel Gun Model: AR-15 Length: 5.65 in Condition: New Features of Sniper AR 15 Castle Nut Wrench: Convenient size Easy to operate Package Contents: Sniper AR 15 Castle Nut Wrench What firearm models does the manufacturer say Sniper AR 15 Castle Nut Wrenches is compatible with? The manufacturer says that Sniper AR 15 Castle Nut Wrenches is compatible with AR-15Sniper ARTL09: Castle Nut Wrench for AR 15 .223/5.56 Steel Black small