Angstadt Arms MDP-9 9mm Roller Delayed Complete Upper

The Angstadt Arms MDP-9 is a complete upper receiver intended for pistol-caliber AR platforms, built around a roller-delayed action and finished in a durable Type III hard coat anodize. It is configured for 9mm and designed to integrate with compatible lowers for compact, low-recoil operation. Construction uses aluminum components and a black finish for a utilitarian, low-profile appearance.

Key Specifications

• The caliber is 9mm.
• The model is the MDP-9.
• The action type is roller-delayed.
• The barrel finish is Black Type III Hard Coat Anodized.
• The barrel material is Aluminum.
• The rate of twist is 1:10.
• The color is Black.
• This item is listed as a Complete Upper Receiver.

The MDP-9 offers a compact, controllable pistol-caliber upper suited to range training, competition, and compact defensive-minded builds where a low-recoil 9mm solution is preferred. Its durable anodized finish and thoughtfully engineered roller-delayed mechanism make it a practical choice for shooters who prioritize reliable, serviceable components in a streamlined package.