[GreenLantern]

Anybody use these rails from Knights Armament? As I understand it the RAS is the later, free-floating version. If you use them what's your overall impression and what accessories do you have attached?

GL

 

[Sniper]

Knights equipment is one that I've never dealt with. No help here, anyone else?

:sniper:

 

[GreenLantern]

No responses over on another board either. I know I can get my answers at ar15.com but it's blocked here at work and haven't had time at home to sit on the pc.

Seems the price for RAS is $300+ which would be might expensive for a set of plastic handguards, if indeed they are plastic.

 

[mrcr0603]

Originally posted by GreenLantern
Anybody use these rails from Knights Armament? As I understand it the RAS is the later, free-floating version. If you use them what's your overall impression and what accessories do you have attached?

GL

I had a RAS on my Bushmaster HBAR, which I've very recently replaced with an ARMS SIR #51.

Here's is my AR when it had the RAS:

The standard, M4/M5 RAS is NOT free-floating. KAC does sell a free-floating RAS, though.

The RAS is the first rail system to be fielded in the U.S. military, and is combat proven.

I think the only drawback to the RAS is that it DOESN'T free-float the barrel.

Here's an excellent informational website put together by an AR15.com board member about the products of Knight Armament Corp.:

www.quarterbore.com/kac/index.html

Chris

 

[GreenLantern]

Looks nice. I'll have to check out the ARMS SIR and see what it looks like too.

 

[mrcr0603]

Originally posted by GreenLantern
Looks nice. I'll have to check out the ARMS SIR and see what it looks like too.

#45 SIR-C for an A3 (flattop) upper receiver.

#51 SIR-C for an A2 (carry handle) upper receiver.

Chris

 

[GreenLantern]

Thanks for the photos. I did check out the SIR on the internet and guess it looked kind of bulky to me compared to the RAS/RIS. Though I have no experience with either so I could be way off base.

 

[mrcr0603]

First thing to know about the SIR is that it's two piece. A metal upper portion ....

.... and a polymer, lower handguard:

The weight though is surprisingly light. This is because most get the misconception from appearance that it's heavy, when in fact it's not, because of the polymer construction of the lower handguard.

The first ARMS SIR that came out was the #45. It is wider than a RAS. I could put my light on the right side of the RAS, and activate the tailcap button with my thumb while holding the front grip. I couldn't do this with the #45.

Now ARMS has come out with new SIR's, all of which are "Slimline". This pic shows the older (and wider) #45 on top, and the new "Slimline" (a #51):

The SIR is definitely an improvement from the RAS. Freefloating is the new rage, with KAC too and their RAS 2.

Both the SIR and RAS 2 are expensive, but worth every penny if you want a top-quality, free-floating, user-installed rail system.

Chris

 

[BillVan]

Who has the best prices on the ARMS Sir models?

 

[mrcr0603]

Originally posted by BillVan
Who has the best prices on the ARMS Sir models?

Since SIR prices seem to be pretty fixed from what I can tell, it's mainly good service to the customer that you're looking for, and for that you just can't beat Mid-South Tactical Network, or MSTN:

mstn.biz

There are several SIR models out now, so to get an idea of what they are, the website of Cal's Sporting Armory is pretty good:

www.calssportingarmory.com/ARMSMounts.htm

Chris