Comments by "Robert Morgan" (@RobertMorgan) on "Professional Ordnance Carbon-15: A Super-Light AWB AR-15" video.

Cheap and unfinished, lol, which is exactly why Bushmaster bought them, it fits their standards.
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I had one almost identical this this rifle. The only differences were mine had the smooth barrel and a set-screw mounted muzzle brake. It was actually a great gun. Under rapid fire, with the light weight and brake properly mounted, you had to force it UP rather than hold down under recoil. It shot very well. I probably put a few thousand rounds through it over the 15 years or so I owned it. Only issues I had were a broken extractor (replaced with a milspec, no issue), and a broken flimsy charging handle (replaced with a milspec DPMS, no issue). I ended up selling it solely based on all the naysaying of major parts breakage and the lack of replacement parts. I decided to sell it before it broke and became worthless, so I traded it to my favorite dealer straight up in 2017 for a brand new in the box Gen 3 Glock 17.
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The one I owned ran just fine without that buffer installed. I dare my current milspec AR to match it.
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Ironically the opposite. It's like handling graphite. Even with wet hands it's dry. The oval handguards on those were like gluey sandpaper, very retentive. Also, zero parts to corrode, it was entirely non-metallic or stainless.
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"Bet it has another seal on the inside diameter that seals against the guide rod." No. Air pressure was not an effect here. I owned one of these and it worked ok without the rubber gasket on the buffer (lost it for a while, then found it), and it also ran passably with the buffer removed entirely. It was just spring powered. The buffer wasn't weighted or shot filled that I could ever tell, just a plug of aluminum
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Actually more like 3d printed decades before you or anyone was aware of the term 3d printing. Sometimes we forget polymer firearms are almost in their 50s, it's not a new thing and it's far past debatable.
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