The MP 18's basic design formed the basis of most submachine guns manufactured between 1920 and 1960 — four decades of weapons development tracing a direct line back to one German engineer's workbench.

Four decades. That's not a footnote in firearms history — that's the whole chapter. Next time you're handling a Sten, an MP 40, a Thompson, or even thinking about your PCC on the competition table, you're looking at the downstream consequences of what Schmeisser figured out in a German factory during WWI.

At 1,200 rounds per minute, neither the modified Luger nor Mauser C96 could be aimed with any accuracy. The commission concluded that a fundamentally different weapon was needed.

This is the part that always gets me. They tried to solve a new problem with an existing tool — basically slapping a bigger magazine on a pistol and hoping for the best. Anyone who's watched someone run a stock handgun in a competition and then try to compensate for its limitations by going faster knows exactly how that ends. Sometimes you just need a different gun.

German military doctrine actually called for a second soldier to accompany the MP 18 gunner just to carry spare magazines — effectively turning a weapon designed for fast solo assault use into a two-man crew system.

The magazine was a logistical anchor from day one. The testing commission overruled Schmeisser's preference for a box magazine because the drum was already in the supply system — classic institutional decision-making. The gun paid for that choice in the field. Every time you've argued with yourself at the reloading bench about whether a new mag design is worth retooling around, this is the historical version of that same conversation.

Like many open-bolt designs of its era, the MP 18 was vulnerable to accidental discharge if the buttstock received a hard knock while the bolt was forward on a loaded chamber — the impact could drive the bolt rearward enough to pick up and fire a round.

This is the kind of detail that matters if you've ever thought about the engineering decisions behind modern safety mechanisms. The Sten and MP 40 both inherited a fix for this specific failure mode. Every safety system on a modern firearm is the accumulated scar tissue of someone who learned the hard way — usually in the worst possible conditions.

What's a design compromise — magazine, safety, ergonomics, anything — that you've run into on a gun where you could tell the original engineer got overruled by someone who never had to use it in the field?

Read the full article in The Handbook → | By The Boise Gun Club Team