CMC Triggers AR-15 Quick Detach Receiver End Plate Black Small. This one adds a QD socket so you can clip and unclip a sling in a second. It's stamped from mil-spec steel and finished in manganese phosphate the same parkerized coating used on service parts. That finish holds oil well and resists rust. It fits AR-15 M4 and M16 pattern rifles. Specifications for CMC Triggers AR-15 Quick Detach Receiver End Plate: Manufacturer: CMC Triggers Color: Black Gun Make: AR Platform Gun Model: AR-15 Handle Color: Black Package Contents: CMC Triggers QD End Plate Fits AR-15 Black What firearm models does the manufacturer say CMC Triggers AR-15 Quick Detach Receiver End Plate is compatible with? The manufacturer says that CMC Triggers AR-15 Quick Detach Receiver End Plate is compatible with AR-15CMC Triggers CMC-EP-QD: AR-15 Quick Detach Receiver End Plate Black Small