Angstadt Arms MDP-9: MP5 Meets AR15

Published on August 19, 2022
Duration: 16:38

This guide details the field stripping process for the Angstadt Arms MDP-9, a 9mm roller-delayed carbine. It covers the basic steps to remove the bolt carrier group and recoil spring assembly, essential for routine maintenance. The video emphasizes the mechanical similarities to the HK MP5 and the advantages of a delayed blowback system.

Quick Summary

The Angstadt Arms MDP-9 is a 9mm carbine featuring a roller-delayed blowback system, inspired by the HK MP5. This mechanism allows for reduced felt recoil and a lighter bolt carrier group compared to simple blowback designs, enhancing shootability and accuracy. It boasts a 5.85-inch barrel with 1/2x28 threads and a tri-lug adapter, and is compatible with Glock-style magazines.

Chapters

  1. 00:00Introduction: Angstadt Arms MDP-9
  2. 01:18Blowback Systems Explained
  3. 03:40Angstadt Arms History
  4. 04:09External Features & Stocks
  5. 06:01Lower Receiver & Controls
  6. 08:06Magazine Compatibility & Bolt Hold-Open
  7. 09:41Field Stripping & Disassembly
  8. 11:30Roller-Delayed Mechanism Deep Dive
  9. 13:36Internal Components & Barrel Specs
  10. 15:37Final Assessment & Comparison Tease

Frequently Asked Questions

What makes the Angstadt Arms MDP-9 different from other 9mm carbines?

The MDP-9 utilizes a roller-delayed blowback operating system, similar to the HK MP5, which provides reduced felt recoil and allows for a lighter bolt carrier group compared to the simple blowback systems common in many 9mm carbines.

What are the key technical specifications of the Angstadt Arms MDP-9?

The MDP-9 features a 5.85-inch barrel with 1/2x28 muzzle threads and a tri-lug adapter. It operates in 9mm caliber and is designed to accept Glock-style magazines, with included Magpul GL9 mags offering a 27-round capacity.

How do you field strip the Angstadt Arms MDP-9?

Field stripping involves ensuring the firearm is unloaded, pulling the captive rear pin to pivot the upper receiver, removing the bolt carrier group, and then separating the captive recoil spring assembly from the bolt carrier.

What is the main advantage of the roller-delayed blowback system in the MDP-9?

The primary advantage is a significant reduction in felt recoil and muzzle movement, making the firearm easier to control for faster and more accurate follow-up shots compared to simple blowback designs.

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