[HIGH-TECH]Recoil for submachine guns and machine pistols

[Max Schreck]

Recently I just skimmed some of the weapons tables in GURPS High-Tech, and I noticed something for the first time that struck me as rather odd. All submachine guns have the same recoil, namely 2.

I am no weapons expert, and I have only fired a few firearms in my life, but it seems somehow wrong to me that e.g. a M1921 .45 ACP or a MAC-10 .45 should have the same recoil as a FN P90 or a MP5 or whatever; mind you, I have never fired any of these weapons in my life, but when I've seen real life footage of these guns fired on full auto, it seemed to me that there was significantly more recoil with the Thompson than with a P90 (or many other SMGs for that matter).

Furthermore, looking at the pistols, one kan see that a M1911 .45 ACP has more recoil than a 9mm Browning Hi-Power. And yet a .45 calibre SMG has no more recoil than a 9mm SMG. There was a difference in the Basic Set, but now no more.

So, am I just wrong, and SMGs have no appreciable difference in recoil or is this legitimate errata? What gives?

Cheers,

Max