Colt 11.5 Hvy Barrel & Knights RAS

**mildot** · 09-06-17, 20:39

Looking to get some feedback on if this "combo" would work together? Thanks

Colt 11.5 5.56 Heavy Barrel

( SP401757 )
This is a NEW (not a take off or cut down) Colt 11.5" Heavy Barrel (FBI HRT special order) 5.56 1/7 twist chrome lined barrel. HPT/MPI Tested with an M4 barrel extension and F marked FSB. Includes a barrel nut and handguard cap.

**Ak44** · 09-06-17, 21:23

You need a RIS not a RAS.

**markm** · 09-06-17, 23:16

I can remember failing to get a RAS on a damned SIONICs 11.5. It depends on the diameter behind the FSB.

**tom12.7** · 09-07-17, 18:28

Any reasons to use the older RAS vs the URX? Just a question.

**mildot** · 09-07-17, 18:29

Originally Posted by tom12.7

Any reasons to use the older RAS vs the URX? Just a question.

Not really, other than, maybe making a MK18 clone?

**tom12.7** · 09-07-17, 19:01

The RAS was innovative for it's own time. For now though, I'd rather look towards the possible URX offerings.

**Bryson** · 09-07-17, 19:06

Where can I get one of those barrels?

**jstalford** · 09-07-17, 19:26

Originally Posted by Bryson

Where can I get one of those barrels?

Grant gets them in sometimes. Or gunbroker.

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**Tigwelder1971** · 09-10-17, 20:18

The RAS M4 does fit the FBI HRT heavy barrels.

I didnt think they did until I was shown otherwise this weekend. Up till then, I thought the RAS II was the only option.