Looks like the US Military will be upgrading the venerable M4 carbine with a heavier barrel and name it the M4A1. Why? Durability, the videos in this article depict a very extreme test of the carbine. In one video, the lighter barrel turns red hot, droops and eventually explodes. The second video, the carbine with a heavier barrel catches fire, but continues to operate until the gas tube ruptures.
This is really a ho-hum story, but the videos are pretty cool, so go watch them.
This is really a ho-hum story, but the videos are pretty cool, so go watch them.
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