CMC Triggers AR-15 Ambidextrous Receiver End Plate Black Small. It puts QD sling sockets on both sides so your sling attaches where it makes sense for how you're running the gun. The plate is made from 4130 heat-treated steel which is stronger than standard stamping and stands up to sling loads. Manganese phosphate finish keeps rust off. It works with AR-15 M4 and M16 platform rifles and installs like any standard end plate. Specifications for CMC Triggers AR-15 Ambidextrous Receiver End Plate: Manufacturer: CMC Triggers Color: Black Gun Make: AR Platform Gun Model: AR-15 Handle Color: Black Package Contents: CMC Triggers Ambidextrous Receiver End Plate Fits AR-15 Black What firearm models does the manufacturer say CMC Triggers AR-15 Ambidextrous Receiver End Plate is compatible with? The manufacturer says that CMC Triggers AR-15 Ambidextrous Receiver End Plate is compatible with AR-15CMC Triggers CMC-EP-QD-AMBI: AR-15 Ambidextrous Receiver End Plate Black Small