02 April 2026

One Point Nine

The M157 optic has been, unofficially, described as "just shy of two pounds."

That's a great deal lighter than 2.2 kg!

That is well within the 1.16 to 2.26 lb. I'd found previously.

So I'm calling it 1.9 lb. for GURPS purposes.

M7 "Rifle": 9.8 lb. loaded with a 20 round magazine.  9.9 lb. loaded with a 25 round magazine.
Suppressor: 1.5 lb.
M157 Optic: 1.9 lb.

13.2 lb. or 13.3 lb. all up!

XM8 Carbine: 8.9 lb. loaded with a 25 round magazine.
Suppressor: 1.3 lb.
M157 Optic: 1.9 lb.

12.1 lb. all up.

Since it looks like troop feedback is leading to using the Magpul PMAG-25 LR/SR, I've given the higher cap mag weight for the M7 too.

This means the basic load of spare ammo is 9 lb. and 22.3 lb. for the M7 and 21.1 lb. for the XM8.

Still 6.4 lb. heavier than a suppressed M4A1+ with suppressor and 25 rounds short with the M7.  5.9 lb. heavier with the XM8.

That's not horrid.

Now they need to fix the reliability issues with the optic.

And accuracy issues with the M7.

And the eye-watering price of the 6.8x51mm ammo.

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