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Then there is the direct impingement gas tube, which is very difficult to take out and clean, while it is so narrow as to very easily clog up.
Then there is the fact the .223 is just way too small of a projectile, and velocity can not make up for small mass because you then lose too much to friction.
Also that small of a mass will not stop someone from returning fire, even if you hit them.
That is why the ,223 is not legal for hunting deer or anything larger.
ll under the law, not superior to us. That would be impossible in a democratic republic.
I have owned and shot ARs for 50 decades. I presently own 30 and I have built hundreds. I shoot them weekly. As a firearms instructor I teach classes with them and as a range officer see and supervise other people using them. I used the M-16 in Vietnam in battle and I have a Class III M-16 now.
I disagree with your comment about direct impingement. I have never seen a gas tube fail except in meltdown videos where they intentionally heated up the AR to see how long it would go before failure. By the way, an AK will fail with a high cycle rate.
I also disagree with you about lethal the .223 can be. A .223 bullet will kill you. Make no mistake about it. Both M-193 and M-855 are deadly rounds up to about 250 yds. They can also be deadly at 500 yds.
The .233 military round is high velocity and it fragments and creates a pretty good size wound cavity. I have seen the lethal effect in Vietnam.
A FMJ commercial bullet is not made to fragment and is not as lethal as the military rounds. I only use them for range shooting. If I had to use an AR for shelf defense I would use the right bullet.
A .223 can be effective for deer hunting. A 68 grain soft point will be very effective.