Asked over in the Armalite AR10 forum, but no replies. I have an Armalite AR10 A4 (20") and an Armalite AR10 A4 Carbine (16", mid-length gas system) that I want to free float.

1) The STAR 10 13-2 (rifle length) seems to fit the bill except for being too long to fit with the standard picatinny rail gas block in place. I could replace it with a LP gas block, but I hate to lose the ability to fit a front sight that isn't handguard mounted. The rifle is shot a lot using a sling, and the whole point of free floating is to prevent POI shifts caused by sling tension. Mounting a front sight to the handguard takes me back to square one as the sight will move with the handguard under sling tension. Has anyone faced a similar condundrum, and were you able to make the 13-2 work?

2) Will I have the same problem with the 9-2 on the carbine? It doesn't seem so based on my measurements, but I'd be interested to hear of first hand experiences.

Thanks in advance for any input.

I apologize for the delay for some reason I am not getting notified of new postings. The 9-2 will certainly work for you. It would not require you to give up the barrel mounted sight. Thank you!

Is there a chance of an 11.2" STAR10 in the future?
I'm looking for one to use on a 14.5 Noveske without the gas block hanging out in open air.
The STAR13.2 is a little longer than I want.

Not at this time no. Im sorry.