Quoted: Ever wonder why Ed and crew don't have a place here?? I have bought from them before, and I was happy with the parts. I would never buy from them again due to the crap they got into with others on the site. Also, most places have to really work to get a 10" upper to work. I would have hesitations about an 8" upper.
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I won't get into politics of GSE, but I think you are comparing apples to oranges.
A 10" barreled upper with a carbine length gas system is certainly a poor plan.
However, an 8" barreled upper with a pistol length gas system is certainly acceptable.
More info on gas system lengths is
here as you don't seem to be aware of the differences.
I have made some 6.5" barrels with pistol gas systems and they run great.
8" barrel would even have more dwell time and runs a smaller diameter gas port.
Randall Rausch
www.ar15barrels.com