I think we definitely should have SEAL/SAS/Spetsnaz .50cal rifles for anti-armor, as well as anti-personnel effects.
I also think some special demolition backpack nukes would be useful as well, albeit as a novelty piece for Cold War scenarios.
Most importantly, I again request that we have larger units such as battalions, regiments and brigades as single units, with the associated number hit points, sensors, (including organic ISR if appropriate) weapons, as well as the corresponding speed, range, and maneuverability of such an organization.
Though surrounded by a great number of enemies
View them as a single foe
And so fight on!