I think I remember those way back when, 20+ years ago. The aluminum round FF tube? I think it was checkered? It was certainly nice than the stock blasters of the 20th century.
I don't put much stock in 'em. I think you can do much better --no, I KNOW you can do much better today.
I won't go into how I build 'em but if interested we can go that way. My advice is to build one and to start with a Krieger, Satern, etc., Lilja if you like button rifled. And I'm not so sure I'd do 24"... And if I really wanted it to be a tack driver, I'm not sure I'd be using 5.56 either, there are far better and I prefer 6.5G.
I know Colt ain't bedding these and doing all that shit, so I think "accurized" to them means "it's got a long FF barrel, 2 stage trigger". That 2 stage trigger is just like an RRA in case you've never tried one, nothing special, not as good as a Geissele, and the barrel IS the weapon as far as I'm concerned, so unless it comes with a cut rifled barrel that's got a long track record for producing sub MOA groups, not interested.
I also wanna say the barrels on those were 1.9 or maybe 1.8? 1.8 can be useful, 1.9 not so much. I also think most of 'em were heavy as fuck but I do recall some with thinner, fluted barrels. They were still sorta on the heavy end though.
Now if they have collector value and that's what you're after, I don't know. But I know you can dig these up on Gunbroker if you're patient. I'm sure there's a lot of safes with these just sitting nowadays.