This upper receiver for the 468 integrates the Lok-Bolt unit into the receiver itself - ensuring the bore in continuous the entire length. Perfect for the Javelin bolt! Comes with a top rail and DMAG feed adapter. Install with your existing charging handle and hardware, and use the barrel and hand guard currently on your 468. MCS 468 A1 Upper Receiver (Autococker Threaded) - High Precision Machining: Constructed from machined aircraft aluminum, this 468 One Piece Upper is crafted with greater precision, offering all the benefits of a one-piece system, including smoother bolt action and improved efficiency.- Improved Lok Bolt: Features a newly improved lok bolt design for easier cleaning and installation.- Complete Assembly: Comes with a rear takedown pin and lok bolt installed. Simply transfer the existing parts from your current upper.- Compatibility: - Designed for right-hand shooters. - Compatible with Auto Cocker barrel threads. - Compatible with all versions of 468 and PTR paintball gun. This one-piece upper is designed to enhance your shooting experience with superior precision and ease of maintenance.