MP 18: The Maschinenpistole That Invented a Weapons Class
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Long article, so let's dig in properly. The MP 18 is one of those guns that most shooters have heard of but couldn't tell you much beyond "old German SMG." The actual story is messier and more interesting than the legend.
The MP 18 was the first mass-produced submachine gun to be fielded extensively in an infantry assault role—and that distinction is what made it the template everything else followed.
The Villar Perosa technically got there first, but it was a twin-barreled aircraft/crew-served thing that nobody knew what to do with. The MP 18 showed up as a soldier's weapon — shoulder stock, manageable cyclic rate, designed around how infantry actually fought. That's the distinction that matters. You can argue firsts all day, but the gun that everyone copies is the one that got it right.
Soldiers compounded the risk by habitually leaving the bolt closed to keep debris out of the chamber.
Open-bolt safeties — or the lack of them — still come up at the range whenever someone's running an older design. Leaving a bolt closed on a weapon with no external safety because you're worried about mud is exactly the kind of field logic that gets people hurt. The Sten and MP 40 eventually solved this with a notch in the receiver. It's a simple fix, but it took a war and some accidental discharges to get there.
Contrary to a persistent claim, according to Wikipedia there is "no concrete evidence that the Bergmann MP 18/I reached the front lines in early 1918 or that submachine guns were employed by German Sturmtruppen during the Spring Offensive."
The Spring Offensive narrative is one of those things that gets repeated in gun writing like it's settled history. Turns out the first documented unit didn't take delivery until July 1918 — after the offensive had already ended. The gun's reputation outran its actual combat record by about six months. That's a good reminder to push back on the "changed the war" framing you hear a lot.
In 1922, Foreign Minister Walther Rathenau was assassinated by ultranationalists using a stolen MP 18.
Nobody designs a weapon and expects it to show up in a political assassination three years later. The post-war proliferation of MP 18s — Freikorps, criminal organizations, foreign buyers, Spanish Civil War, the Chaco War — is a reminder that military hardware doesn't retire cleanly. It just changes hands.
The 1924 Estonian coup attempt saw MP 18s reportedly used to defend the Tallinn barracks against Communist militants armed with Thompson submachine guns—possibly the first engagement where submachine guns appeared on both sides.
Two different countries, two different design lineages, squaring off in a barracks firefight in Estonia. That's a hell of a footnote. The Thompson was a heavier, more expensive gun aimed at a completely different market — and here they are on opposite sides of the same fight within six years of both designs being fielded.
For those of you who've handled open-bolt designs — whether that's a MAC-10, a STEN, an UZI, whatever you've run at a class or on a range trip — how did the manual of arms change the way you thought about muzzle discipline and administrative handling compared to a closed-bolt semi-auto?
Read the full article in The Handbook → | By The Boise Gun Club Team
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