Comments by "n" (@user-pq4by2rq9y) on "SIG M5 Spear Deep Dive: Is This a Good US Army Rifle?" video.
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In hindsight, yeah it is a bad idea, heavy rifles aren't particularly suited for urban warfare and you will have better options to deal with enemies in open terrain. Think small wheeled drones armed with anything from 7.62x51mm to 30mm cannons, loitering ammunitions, air lifted artillery, improved air support capabilities (cheap turboprops and tilt-rotors with much better loitering times compared to jets).
There will be plenty of ways to deal with enemies in the open, will the capability to defeat level III body armor be enough to offset the cons in the urban environment? I don't think so. Personally, I would choose a 300blk carbine with, let's say, 10.5 inches of barrel length, raise the pressure as far as I can and build my concept from there.
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