DoubleStar Oops Replacement Kit Black. These AR15 Upper Parts developed by DoubleStar 2- firing pin retaining pins to hold your essential firing pin in place. This DoubleStar Oops Gun Accessories Kit also comes with 2- selector detents along with plenty of other vital parts you need for your weapon. Pick up this DoubleStar Oops Gun Parts Kit for top quality parts that will improve your gun's function and performance. Specifications for DoubleStar Oops Replacement Kit: Manufacturer: DoubleStar Color: Black Features of Doublestar Oops Replacement Kit Oops Replacement Kit. Includes: 4-Takedown detents 4-Takedown detent springs 2-Buffer detents 2-Buffer detent springs 2-Extractor springs Fits easily in a range bag Package Contents: DoubleStar Oops Replacement Kit 4-Takedown detents 4-Takedown detent springs 2-Buffer detents 2-Buffer detent springs 2-Extractor springs Fits easily in a range bag DoubleStar AR791: Oops Replacement Kit Black