Finally got through to Fulton and their armorer said the port size was .099"
Decided to go with the barrel McKay Enterprises has:
http://store.mckay-ent.com/ar15-m16/...nt-barrel.html
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Finally got through to Fulton and their armorer said the port size was .099"
Decided to go with the barrel McKay Enterprises has:
http://store.mckay-ent.com/ar15-m16/...nt-barrel.html
Good call on the barrel. Unless it's going on a match gun, I'd rather have a 5.56 chamber than CBI's "hybrid match" chamber. Thanks for posting that barrel -- it's good to have more options for an A1 profile CL 1/7 twist barrel.
It shipped yesterday. I had one of those very same barrels from McKay a year or two ago (could kick myself for getting rid of that upper!) and it is indeed an A1 profile. Rumor has it they are IDF contract overruns but who knows.
Going to use the PRI rifle-length black carbon fiber FF handguard, A5 buffer kit, Choate collapsible stock (I like them), BCM upper I already have, and slap an Aimpoint Pro on it. Of course it has to go to Adco first for the FSB installation. Might even put a 3-prong M16 FH on that bad boy!
just for the sake of correctness, the A5 tube is NOT "essentially" a rifle buffer tube. its in between the carbine and rifle and the A5 buffer is designed to only work with the A5 tube.
the only component of the A5 system that is the same as anything is the buffer spring, its a rifle spring.
I suspect that one is a shetland pony with a waffle taped to it's head.
If a short barreled unsuppressed rifle being fed subsonics is what defies the A5 a configuration that runs, I'm guessing we're still in good shape making unqualified recommendations for the A5 system; a 10" or shorter barrel being fed ammunition designed to remain subsonic through 16" barrels on a SBR setup that should realistically be suppressed to achieve best results needing some can backpressure... I don't see the use in a setup like that, and I still suspect that an A5H2 would cycle fine with it anyway.