Luth-AR AR15 Trigger Hammer Disconnector. Luth-AR produces only the best quality parts for the AR platform. All of the parts included in their Trigger kits are investment cast or otherwise machined to Mil-Spec drawings materials and heat treat. Specifications for Luth-AR Trigger Group 3-piece AR15: Manufacturer: Luth-AR Color: Black Fabric/Material: Magnesium Phosphate Caliber: .223 Remington Gun Make: AR Platform Gun Model: AR-15 Gun Type: Rifle Features of Luth-AR Trigger Group 3-piece AR15: Shipping Weight 1 lbs Shipping Dimensions 3 x 3 x 3 in Package Contents: Luth-AR Trigger Group 3-piece AR15 AR Hammer AR Trigger AR Disconnector Luth-AR LRPK-THD: AR15 Trigger Hammer Disconnector