For this defensive doctrine to work it need integrated Anti Armor, Anti Air, Artillery, with heavy defensive works covered by machine guns, behind a belt of mines.
Defense to be effective has to be layered with row upon row of defenses..... Breach one and start getting hit by the next one behind it, while being flanked from left and right.
Heavy weapons needs a 80/81/82mm mortar to effectively engage enemy forces using a wall, trenches, or a hill top for cover. Probably larger 120mm mortars in the Regimental heavy weapons section, along with larger possibly towed AT guns (Soviets field a 125mm AT gun currently) so there is enough punch to stop a M1 tank.
AAA pedestal mounted 12.5mm (.50) M2HBs in a single mount, quad fifties are good at the company level, something larger like the 40mm Bofors, and the 90mm AAA artillery are necessary to protect larger formations or fixed assets like rail yards, bridges, cross road, ammo dumps, factories, water dams, etc.
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