B&T MP9
Brügger & Thomet AG · Submachine Gun · In Production · 2004
Also known as: MP9, MP14, TP9, Machine Pistol 9mm
Overview
The Brügger & Thomet MP9 is a compact 9x19mm submachine gun developed and manufactured by Swiss firearms company B&T AG. Introduced in 2004, the MP9 represents a comprehensive redesign of the Austrian Steyr TMP, which B&T acquired in 2001 after Steyr discontinued production. Weighing just 1.4 kg empty, the MP9 achieves its lightweight profile through extensive use of advanced polymer composites, which constitute approximately 80% of the weapon's construction. The firearm employs a short-recoil, rotating barrel locking system firing from a closed bolt, providing enhanced accuracy compared to traditional blowback submachine guns. The 130mm barrel features a quick-detach tri-lug mount for B&T's proprietary low-backpressure suppressors. The MP9's ambidextrous controls include a three-position fire selector (safe, semi-automatic, fully automatic) accessible from both sides. The stock folds to the right side of the weapon via a single push-button release, reducing overall length from 523mm to 303mm for compact carry. Standard cyclic rate is 900 rounds per minute, with the MP9-N variant capable of 1,100 rpm. The weapon feeds from transparent polymer magazines available in 15, 20, 25, and 30-round capacities. Integrated Picatinny rails run along the top receiver and right side, allowing mounting of optics, lights, and lasers without interfering with the folding stock. The MP9 has seen widespread adoption by Western European military forces and law enforcement agencies, with Swiss forces designating it the MP14 for use as a personal defense weapon.
Specifications
| Weight (empty) | 1400 g (49.4 oz) |
| Weight (loaded) | 1740 g (61.4 oz) |
| Overall Length | 523 mm (20.59") |
| Folded Length | 303 mm (11.93") |
| Barrel Length | 130 mm (5.12") |
| Height | 210 mm (8.27") |
| Width | 47 mm (1.85") |
| Action Type | Short Recoil |
| Firing Mechanism | Striker Fired |
| Trigger Type | Single Stage |
| Trigger Pull | 22 N (4.9 lbf) |
| Magazine Capacity | 30 rounds |
| Magazine Type | Detachable Box |
| Muzzle Velocity | 400 m/s (1312 fps) |
| Muzzle Energy | 640 J (472 ft·lbf) |
| Effective Range | 100 m (109 yd) |
| Maximum Range | 1500 m (1640 yd) |
| Rate of Fire | 900 rpm |
| Barrel Rifling | Right Hand |
| Rifling Twist | 250 mm (9.84") |
| Number of Grooves | 6 |
| Frame Material | Polymer |
| Barrel Material | Steel |
| Stock Material | Polymer |
| Finish | Black Anodized |
Calibers
- 9x19mm Parabellum · primary · 9x19mm NATO — also known as 9mm Luger, 9mm NATO, 9x19mm
Features
- Firing modes: Semi Automatic, Full Automatic
- Feed systems: Detachable Box Magazine
- Safety mechanisms: Manual Safety Selector, Trigger Safety, Drop Safety
- Features: Closed Bolt Operation, Rotating Barrel Locking, Side Folding Stock, Ambidextrous Controls, Picatinny Rail Top, Picatinny Rail Side, Suppressor Ready, Tri Lug Mount, Transparent Polymer Magazines, Integral Foregrip, Progressive Trigger, Three Position Selector
Variants
- B&T MP9-N — Enhanced
- B&T TP9 — Semi Auto
- B&T TP9-N — Semi Auto
- Swiss Army MP14 — Military
Service history
Operators
- Swiss Armed Forces · adopted 2014 · as MP14
- Basel City Police · adopted 2007 · as MP9
- Groupe d'Intervention de la Gendarmerie Nationale (GIGN) · as MP9
- Groupe de Sécurité de la Présidence de la République (GSPR) · as MP9
- Dutch KMAR · as MP9
- Spanish National Police · as MP9
- Romanian Special Forces · as MP9
- Indian Special Forces · as MP9
Production
Production years: 2004-present
Continuous production for military and law enforcement contracts worldwide, particularly Western Europe and Southeast Asia
Origin
Country of origin: Switzerland
Designer: Steyr Mannlicher (TMP), Brügger & Thomet (MP9 redesign)
Notes
The MP9's development history is intrinsically linked to the Steyr TMP (Tactical Machine Pistol), which Austrian manufacturer Steyr Mannlicher introduced in 1992 as a private venture for special operations and VIP protection roles. Despite innovative features including polymer construction and a rotating barrel system, the TMP achieved limited commercial success. Facing financial difficulties, Steyr sold the complete intellectual property, manufacturing rights, and tooling to Swiss company Brügger & Thomet in 2001 for the nominal sum of one Austrian schilling. B&T's engineers implemented over 30 modifications between 2001 and 2004, transforming the TMP into the MP9. Key improvements included redesigning the folding stock mechanism to fold rightward (versus the TMP's forward-folding design), adding a full-length top Picatinny rail, integrating a side rail for accessories, improving the trigger safety system, and optimizing the weapon for suppressor use. The rotating barrel locking system distinguishes the MP9 from most 9mm submachine guns, which typically use simple blowback operation. This system allows the barrel and bolt to recoil together briefly before the barrel rotates to unlock, delaying bolt opening until chamber pressure drops to safe levels. This results in reduced felt recoil, improved accuracy, and allows for a lighter bolt. The MP9's three safety mechanisms (manual selector, trigger safety, drop safety) reflect Swiss design philosophy emphasizing passive safety. B&T offers dedicated suppressors optimized for the MP9's tri-lug quick-detach system, with some models featuring integrated Picatinny rails for mounting lights or lasers directly on the suppressor body. The Swiss Army's 2014 adoption as the MP14 PDW validated the design, particularly for vehicle crews, pilots, and rear-echelon personnel requiring compact defensive firepower. According to B&T, every Western European military has procured MP9s in some capacity, with particularly strong adoption in Southeast Asian markets. The civilian semi-automatic TP9 variant has found success in the United States market as a pistol-caliber carbine platform.
Background
The MP9's resurrection from the discontinued Steyr TMP represents one of modern firearms history's notable second chances. When B&T acquired the TMP rights for a symbolic one schilling, industry observers questioned whether the design had fundamental flaws that doomed commercial success. However, B&T's engineers recognized that the TMP's core technology-particularly its rotating barrel system-was sound, requiring only refinement and better marketing to succeed. The transformation proved so successful that the MP9 became B&T's flagship product and established the company's reputation beyond its original suppressor and accessories business. Swiss Army selection as the MP14 in 2014 was particularly significant, as Switzerland's rigorous testing standards and domestic manufacturing preference made adoption of a Swiss-made weapon both a technical validation and source of national pride. The Basel City Police's 2007 decision to replace their HK MP5 submachine guns with MP9s surprised many, given the MP5's legendary reputation, but reflected the MP9's superior mobility for vehicle patrol and plainclothes operations. French elite units' adoption, particularly GIGN (the Gendarmerie's elite counter-terrorism unit) and GSPR (Presidential protection), brought the MP9 into the highest-profile security scenarios. The weapon's appearance in various video games and films has built recognition among firearms enthusiasts, though the MP9 maintains a relatively low profile compared to competitors like the MP5 or UMP. B&T's development of the TP9 semi-automatic variant for the U.S. civilian market demonstrated the platform's versatility, with many shooters appreciating the unique rotating barrel system and Swiss engineering quality. The MP9's success validated the personal defense weapon (PDW) concept for vehicle crews, pilots, and specialist personnel who need defensive capability without the size and weight of full carbines. As compact submachine guns face competition from AR-15 pistols and other pistol-caliber carbines, the MP9's combination of compactness, controllability, and suppressor integration keeps it relevant in modern security applications.