Free-Float Rails/tubes that use the USGI barrel nut?

[RAM Engineer]

I'm looking for a good quality FF rail (Picatinny or MLok) that use the USGI barrel nut for use on a Colt OEM2. I know of these, but I'm not sure what else is out there:

MI Gen2 Two Piece FF
Centurion Arms C4
Troy MRF
Troy Revolution Carbon Fiber
Troy SOCC
Troy Alpha
Troy Bravo
Troy Charlie
Troy Delta

Any recommendations among this list? I guess the Troy SOCC is the newest.

[markm]

I like Centurion a lot. I'd LOVE them if the bottom pic rail wasn't so tall. If they made those with the RIS II profile, I'd put them on all my guns.

[RAM Engineer]

I like Centurion a lot. I'd LOVE them if the bottom pic rail wasn't so tall. If they made those with the RIS II profile, I'd put them on all my guns.

Yes, I think the tall bottom rail is the only complaint I've seen about the C4. I'm not sure if they did that to accommodate a bayonet lug or if they just did it for production purposes (mirror top rail for ease of manufacturing).

[joeyjoe]

completely agree, Markm. I don't understand why these companies insist on producing tall ass rails?
If Stickman's measurements are correct, the new BCM quad is going to be a bit on the tall side, as well (2.375...according to stickman). Damn. I love the profile of the RIS II and, as a close second, the DDM4 rail. That said, of the available rails that are capable of attaching to the USGI barrel nut, id still choose the C4. I wouldn't fiddle with any Troy kit, but that's just me.

[Endur]

The C4 is where it is at as far as utilizing the standard barrel but. Looks great too.

[dmd08]

Samson also makes rails using the standard barrel nut.

[amac]

Nothing to add but disdain for the proprietary barrel nut system! I've got an KAC quad rail that I could never swap because of their proprietary nut and wrench. Actually quite glad now because I love that thing! Bye bye slick, slim tubes.

[titsonritz]

A DD Omega rail will work also. I personally like the Centurion C4.

[markm]

A DD Omega rail will work also. I personally like the Centurion C4.

Another great option ruined by the tall bottom pic rail. DD's I beam extrusions being the worst of all of them. (no the RIS, but the old DD lite, omega, etc.)

[RAM Engineer]

completely agree, Markm. I don't understand why these companies insist on producing tall ass rails?
If Stickman's measurements are correct, the new BCM quad is going to be a bit on the tall side, as well (2.375...according to stickman). Damn. I love the profile of the RIS II and, as a close second, the DDM4 rail.

Larue and the original KAC RAS have really good cross-sections as well.