GHM-9: B&T's 9mm Budget Carbine (Well, Swiss Budget)

Published on June 4, 2025
Duration: 9:15

This guide details the disassembly and basic maintenance of the B&T GHM-9, a 9mm pistol caliber carbine. Expert Ian McCollum demonstrates how to field strip the firearm, highlighting the hydraulic buffer system and modular design. The process involves removing the stock, then the bolt carrier group, followed by cleaning and lubrication before reassembly.

Quick Summary

The B&T GHM-9 is a 9mm pistol caliber carbine designed as a more affordable option than the APC-9. It utilizes a hydraulic buffer system for recoil management and bolt mass, and its receiver design incorporates components from the KH-9 for cost efficiency. The GHM-9 also offers modularity with swappable lowers for Glock magazine compatibility.

Chapters

  1. 00:00Introduction to the B&T GHM-9
  2. 00:46Historical Context and the P26
  3. 02:02Design Philosophy and Cost Efficiency
  4. 03:23Engineering Challenges: Bolt Mass
  5. 05:08Hydraulic Buffer System
  6. 05:32The 'Grasshopper Mouse' Name
  7. 06:42Modularity and Magazine Options
  8. 07:11GHM-9 SD Model
  9. 08:10Barrel Length Variations

Frequently Asked Questions

What is the B&T GHM-9?

The B&T GHM-9 is a 9mm pistol caliber carbine (PCC) manufactured by Brügger & Thomet in Switzerland. It was designed as a more affordable alternative to B&T's APC-9 model, incorporating cost-saving design elements.

How does the GHM-9 achieve cost efficiency?

B&T achieved cost efficiency in the GHM-9 by combining the APC-9's fire control group with receiver extrusions borrowed from the KH-9 model. This reuse of existing components significantly reduced engineering and production expenses.

What is unique about the GHM-9's buffer system?

The GHM-9 features a hydraulic buffer mounted directly to the bolt carrier. This system not only aids in recoil management but also contributes to the necessary reciprocating mass for the closed-bolt blowback action, a critical design element for its compact receiver.

Can the GHM-9 use Glock magazines?

Yes, the GHM-9 offers modularity through a swappable lower receiver, allowing it to accept proprietary B&T magazines or standard Glock magazines, providing users with flexibility in magazine choice.

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