Quoted: Here's another newbie having another newbie questions about FF HGs.
1) Can I install a FFHG on a barrel assembly with front sight base (FSB)? Or a FFHG could only be installed on barrels with gas blocks (so called bull barrels)?
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Yes, but you'll have to remove the FSB and any muzzle brake or FS. It's done all the time.
2) While building the rifle, install gas tube prior to FFHG or FFHG prior to gas tube?
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The gas-tube comes off with the FSB and goes back on along w/ the FSB, after the FF tube is installed.
3) Since the FFHG only attaches to the rifle at the joint of barrel and upper receiver, the front side of FFHG is really floating. Is it really a good idea to install bipod, sling ring or fore grip on FFHG? Is the FFHG strong enough to support such accessories so that it won't bent or shake???
TIA
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Much ado about nuthin here, most FF systems KAC, Daniel Defense, PRI and other are very "stout" so adding a bipod or other items is NOT a problem.
FWIW, the ARMs S.I.R. systems will FF your barrel and come in "C" (civilian) models which require none of the above, there's also the KAC RAS II which will do the same, here's a #45 S.I.R. similar to the "C" model, albeit a "M" model, just to give ya an idea what they look like:
(pic courtesy of Pete-in-NH aka Legal Transfers, other pic can be seen of the RAS II etc. by perusing the EE AR New Parts forum.....)
Mike