MP9 and TP9: A Complete History From Steyr to B&T

Published on October 21, 2024
Duration: 34:55

This guide details the disassembly of the B&T MP9/TP9, originating from the Steyr TMP. It covers separating the upper and lower receivers, removing the bolt carrier, and extracting the rotating barrel. The process highlights the firearm's unique short-recoil, rotating barrel action with 8 locking lugs and the cam groove mechanism. The information is presented with high authority by Ian McCollum, a recognized firearms historian.

Quick Summary

The B&T MP9 and TP9 are based on the Steyr TMP, featuring a short-recoil, rotating barrel action with 8 locking lugs. B&T's improvements include a Picatinny rail, side-folding stock, reinforced barrel stop block, and a proprietary suppressor designed to manage back pressure effectively.

Chapters

  1. 00:00Introduction and Origins
  2. 02:37Initial B&T Improvements
  3. 03:53Steyr TMP/SPP Features
  4. 06:21Disassembly and Internal Mechanics
  5. 12:45Optics and the Aimpoint Micro T1
  6. 16:51Mechanical Refinements
  7. 18:44Dutch Military Contract and Safety Upgrades
  8. 22:35Suppressor Technology
  9. 28:44US Market and Global Adoption
  10. 30:06Specialized Accessories

Frequently Asked Questions

What is the operating system of the B&T MP9 and TP9?

The B&T MP9 and TP9 utilize a short-recoil, rotating barrel action. This system, inherited from the Steyr TMP, involves the barrel and bolt recoiling together before the barrel rotates to unlock.

How did B&T improve upon the original Steyr TMP design?

B&T enhanced the design by adding a standard Picatinny rail for optics, developing an integrated side-folding stock, reinforcing the barrel stop block, and implementing a nickel-Teflon internal coating for durability.

Why is a proprietary suppressor important for the MP9?

The MP9's short-recoil system is sensitive to increased back pressure. B&T's proprietary suppressor is designed to vent gases, reducing back pressure and preventing potential parts breakage that could occur with standard suppressors.

How is the B&T TP9 configured for the US civilian market?

In the US, the TP9 is sold as a pistol without the vertical front grip to comply with National Firearms Act (NFA) regulations. The grip area is often replaced with a Picatinny rail or a threaded stub.

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