liquid-cooled M16A2 barrel in hopes of keeping the heat sig down?
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Nope. Didn’t know that. That’s gotta add weight.
Can’t throw out muzzle brakes and suppressors, so I guess sabots are out.
Bushmaster makes carbon fiber receivers for AR rifles. I wonder why the military doesn’t adopt those? At least the lower receiver. A carbon upper might be less durable.
Especially if you step to either side of the ramp of a CH-47 $hithook when the engines are going. And similar situations. Aiiiiieeee!
Nope. Didnt know that. Thats gotta add weight.
Sure does. But it also prevents gas tube burn-through, another M16 family problem after a half-dozen Beta-C mags or Chinese LXX drums are cranked through on ratty-tat.
“Bushmaster makes carbon fiber receivers for AR rifles. I wonder why the military doesnt adopt those? At least the lower receiver. A carbon upper might be less durable.”
Because the lower receiver takes more abuse since the stock and hand grip is attached to it and thats where the magazine well is located.