How modularity and Swiss engineering redefined the modern submachine gun

Cultures · Published 11 October 2026 Swipe more like this →

In short: In the 2000s, military demand for intermediate assault carbines surged. In response, Swiss manufacturer B&T developed the APC series: a highly modular family of weapons designed to be more cost-effective than assault carbines while offering unprecedented versatility for operators.

Announced in 2011, the Advanced Police Carbine (APC) series by B&T—formerly Brügger & Thomet—was built to leverage years of feedback from previous submachine gun models like the MP9. The platform is defined by extreme modularity; more than 50% of the parts are interchangeable across different versions. This allows the series to span from submachine guns to assault rifles and battle rifles, chambered in various calibers including 9×19mm, .40 S&W, 10mm Auto, and .45 ACP.

The engineering focuses on managing recoil and maximizing utility. The APC utilizes a straight blowback gas system, but it incorporates a proprietary hydraulic buffer system within the receiver back plate to control recoil. Users can easily customise the layout; the whole firearm, including its charging handle, is ambidextrous and adjustable for left or right-handed shooters. Even the trigger assembly is designed to be compatible with many aftermarket AR-15/M16 replacement parts.

This line underwent major development, notably with the 2019 APC9 PRO launch, featuring a non-reciprocating charging handle and an AR-15 compatible replaceable pistol grip. B&T's ability to scale the platform was demonstrated in March 2019, when they were awarded a $2.6 million U.S. Army contract for the APC9K subcompact weapon. This contract included an initial 350 subcompact weapons with options for up to 1,000 additional units, complete with accessories and spare parts.

General information, not professional advice. Spotted an error? Flag the card or see corrections and complaints.

Intellect Plus is a visual educational discovery platform for exploring fascinating facts and ideas. Brain Food, Not Brain Rot. What is Intellect Plus?

Related

• The SIG Sauer P365: A Modular Approach to Modern Subcompact Handgun Engineering
• The Swiss precision engineering that redefined the modern semi-automatic pistol
• How a specialized German cartridge redefined the limits of personal defense weapons
• The rifle designed to be everything at once, but almost nothing.
• Can a body be legally dead while the heart still beats?
• The global movement modeling its strategy on the fall of apartheid
• Why Brazil remains the undisputed titan of the FIFA World Cup
• How a personal story of fatherhood became a New Zealand box office phenomenon
• A national humiliation that shattered 62 years of home dominance
• The martial arts that were believed to make men bulletproof
• How a single gallon of gasoline nearly ended Brazilian aviation before it began
• Why this English village plays football in the middle of a river

More in Traditions & customs · More in Cultures · Latest · A–Z · All topics