As usual you are wrong, after all gunkid, who was there me or you? About 10 years ago I got some Brit Radway Green 5.56mm, very dirty stuff and designed for the SA 80 NOT the AR. The SA 80 bolt is lighter than the AR. I had over 100 IA's & Stoppages in 200 rds. My gas tube was so plugged that after cleaning the tube with solvent and 12" pipe cleaners, I still had to fire 10 rds of Canadian Ball ammo to get my rifle to fire in the semi auto mode reliably. Why do you think I bought a dedicated .22 upper? I'm not stupid enough to think my AR will be reliable after I use a cheap $200 buck conversion kit.That's bs, as is usual from you. Just fire 3-4 rds of 223 thru it, for every 200-300 rds of .22lr,and fouling will NEVER be a problem. I've never had 223 fouling be an issue, except in the bore, for match type shooting. Keep the gun "wet" with WD-40 and it just keeps on shooting. MANY thousands of rds.
Why rebuild a working system when simple cleaning will do? Cleaning an AR's gas tube is not a time consuming or painful operation and it's not as if one has to flood the tube with solvents.If it got that bad, I think I would swap out the $10.00 part before I would waste a bunch of time blasting it with cleaning products and scrubbing tools.
Because it takes me 30 seconds with a roll pin punch (including beer procurement), and I can afford it.Why rebuild a working system when simple cleaning will do? Cleaning an AR's gas tube is not a time consuming or painful operation and it's not as if one has to flood the tube with solvents.