18 January 2026

The System Is Broken

Take the sights and charging handle off your M1919A4 and put a cable-pull charger on it and it becomes an M37.

Do the same to an M2HB and it becomes an M48.

At one time small changes totally changed the designation system.

Take an M240, ditch the pull-cable, add sights, pistol grip, bipod and normal charging handle; it becomes an M240G.  Why not M240A1?  Why does changing the bipod and flash hider and changing the muzzle device make it an M240B and not M240A2?

WHY?

Dunno.

Used to be an M4 was a 14.5", flat-top with a 3-round burst.  The M4A1 was the same with full-auto.

There used to be a heavier barrel that SOCOM used in their M4A1's...  But that didn't change the designation at all.

Now that heavier barrel is standard and...  It's an M4A1.

Then there's M16A3.  It used to be an M16A2 that exchanged the 3-round burst for full auto.

The M16A4 was an M16A2 with a flat-top.

Now the M16A3 is an M16A4 with full auto.

So the M16A3 is both an A2 carry handle version AND a flat-top version with full-auto.

Shouldn't an M16A4 with full auto be an M16A5?

I've heard that it's because the parts are interchangeable and configuration can be changed readily.

Then explain why the parts swappable M17 and M18 pistols have different designations!

They're actively not using any system for designating the guns.  It will bite them someday.

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