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Posted: 9/1/2014 7:00:01 PM EDT
[#1]
Theres a bunch of different versions. Some free floated, some not. Are you wanting a drop in or free float?
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Posted: 9/1/2014 7:02:29 PM EDT
[#2]
Oh, yeah. Forgot. I'm talking about the drop-in, Army-issue ones.
ETA: am I correct in thinking that there are couple of generations of the drop in ones though?
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Posted: 9/1/2014 7:06:00 PM EDT
[#3]
Quote HistoryQuoted:
Oh, yeah. Forgot. I'm talking about the drop-in, Army-issue ones. In that case you want either the KAC m4 RIS or the KAC m4 RAS. Both are good to go. The RAS is just an updated RIS that attatches to the barrel nut a little bit better, but the RIS is a little bit cheaper these days. You can pick up an RIS on the EE like I did for $100 or a blemished RAS from KAC for $150. Non blemished are like $350 so plan accordingly. Both are good to go. |
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Posted: 9/1/2014 7:07:31 PM EDT
[#4]
Quote HistoryQuoted: In that case you want either the KAC m4 RIS or the KAC m4 RAS. Both are good to go. The RAS is just an updated RIS that attatches to the barrel nut a little bit better, but the RIS is a little bit cheaper these days. You can pick up an RIS on the EE like I did for $100 or a blemished RAS from KAC for $150. Non blemished are like $350 so plan accordingly. Both are good to go. Quote HistoryQuoted: Quoted: Oh, yeah. Forgot. I'm talking about the drop-in, Army-issue ones. In that case you want either the KAC m4 RIS or the KAC m4 RAS. Both are good to go. The RAS is just an updated RIS that attatches to the barrel nut a little bit better, but the RIS is a little bit cheaper these days. You can pick up an RIS on the EE like I did for $100 or a blemished RAS from KAC for $150. Non blemished are like $350 so plan accordingly. Both are good to go. |
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Posted: 9/1/2014 7:09:40 PM EDT
[#5]
Quote HistoryQuoted:
Thanks. I've seen mostly RAS, not RIS in the EE for about $100. Are the RIS handguards not as common to see anymore? Quote HistoryQuoted:
Quoted:
Quoted:
Oh, yeah. Forgot. I'm talking about the drop-in, Army-issue ones. In that case you want either the KAC m4 RIS or the KAC m4 RAS. Both are good to go. The RAS is just an updated RIS that attatches to the barrel nut a little bit better, but the RIS is a little bit cheaper these days. You can pick up an RIS on the EE like I did for $100 or a blemished RAS from KAC for $150. Non blemished are like $350 so plan accordingly. Both are good to go. Theres still a bunch around, but there are probably more RAS's around here than RIS's. Both were Army/USMC issue. The RIS first, RAS second |
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Posted: 9/1/2014 7:14:34 PM EDT
[#6]
Quote HistoryQuoted:
In that case you want either the KAC m4 RIS or the KAC m4 RAS. Both are good to go. The RAS is just an updated RIS that attatches to the barrel nut a little bit better, but the RIS is a little bit cheaper these days. You can pick up an RIS on the EE like I did for $100 or a blemished RAS from KAC for $150. Non blemished are like $350 so plan accordingly. Both are good to go. Quote HistoryQuoted:
Quoted:
Oh, yeah. Forgot. I'm talking about the drop-in, Army-issue ones. In that case you want either the KAC m4 RIS or the KAC m4 RAS. Both are good to go. The RAS is just an updated RIS that attatches to the barrel nut a little bit better, but the RIS is a little bit cheaper these days. You can pick up an RIS on the EE like I did for $100 or a blemished RAS from KAC for $150. Non blemished are like $350 so plan accordingly. Both are good to go. Came to post this. |
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Posted: 9/1/2014 7:18:17 PM EDT
[#7]
Just go with the RAS man. Have it on my issue rifle as well as one of my personal rifles. They are plentiful and cheap. You can even gets "blems" direct from KAC for $150.
You also have the option of the "SAS bottom rail" which adds a locking mechanism kind of like the upper rail. I don't find it necessary but they are decent (although I haven't seen very much play in the standard bottom rail.) Either way, you can't go wrong. I think it is probably the best drop in non-FF rail out there for the AR platform (although it is comparatively heavier than some other options.) |
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Posted: 9/1/2014 7:19:08 PM EDT
[#8]
I picked up a RAS for about $85 in the EE. It didn't come with covers, bag, or VFG but I didn't need them. Be patient and you will probably find one for sub 100.
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Posted: 9/1/2014 7:21:10 PM EDT
[#9]
KAC M4 RAS... best drop in rail i have ever used for damn sure.
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Posted: 9/1/2014 7:22:44 PM EDT
[#10]
Quote HistoryQuoted:
Just go with the RAS man. Have it on my issue rifle as well as one of my personal rifles. They are plentiful and cheap. You can even gets "blems" direct from KAC for $150. You also have the option of the "SAS bottom rail" which adds a locking mechanism kind of like the upper rail. I don't find it necessary but they are decent (although I haven't seen very much play in the standard bottom rail.) Either way, you can't go wrong. I think it is probably the best drop in non-FF rail out there for the AR platform (although it is comparatively heavier than some other options.) I completely agree. Besides what equipment has better testing done on it than mil standard issue equipment? Nothing thats what. Lol |
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Posted: 9/1/2014 7:25:02 PM EDT
[#11]
I still use several M4 RAS, solid as hell but a little on the heavy side. Make sure you get KAC rail panels, IMHO their are none better... if anything use a ladder cover for the top rail only.
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Posted: 9/1/2014 7:45:34 PM EDT
[#12]
Do you have an HBAR? If so, it may require a little dremel work - or it might not.
RAS is a solid, lightweight, and sturdy rail. I love mine. |
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Posted: 9/1/2014 7:59:30 PM EDT
[#13]
How does the EZ CAR from DD stack up against the RAS?
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Posted: 9/1/2014 8:53:49 PM EDT
[#14]
Quote HistoryQuoted:
How does the EZ CAR from DD stack up against the RAS? The EZ Car is lighter but I like the lockup of the KAC RAS better. The RAS may be the only drop-in that I'm willing to span the receiver-rail gap with my optic. With that said, only kept the EZ CAR on my rifle for about 3 months so I don't have that much time behind it. The KAC has some extra things to help keep it from being able to oscillate. The finish on the DD is probably better as well but that is not very high on my list. |
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Posted: 9/1/2014 9:20:55 PM EDT
[#15]
Get the RAS over the RIS, it has a superior mounting system.
Less wobble on the RAS. |
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Posted: 9/1/2014 9:45:41 PM EDT
[#16]
Keep in mind, the RAS still has wobble.
I'll get dog piled over this but UTG's drop-in doesn't even wobble.
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Posted: 9/1/2014 9:55:45 PM EDT
[#17]
Quote HistoryQuoted: I picked up a RAS for about $85 in the EE. It didn't come with covers, bag, or VFG but I didn't need them. Be patient and you will probably find one for sub 100. |
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Posted: 9/1/2014 10:41:33 PM EDT
[#18]
Quote HistoryQuoted:
Keep in mind, the RAS still has wobble. I'll get dog piled over this but UTG's drop-in doesn't even wobble. The bottom rail on my RIS has a little jingle jingle to it, adds character 
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Posted: 9/1/2014 11:05:01 PM EDT
[#19]
Quote HistoryQuoted:
Keep in mind, the RAS still has wobble. I'll get dog piled over this but UTG's drop-in doesn't even wobble. I'm not sure if you're talking about the PRO model or one of the older chinese manufactured models (UTG rails), but I've had some experience with the older crappy chinese ones. Saw one that had such bad tolerances that it would slip out of the front handguard cap with a little pressure on a mounted VFG without even moving the delta ring. While I'm sure there are some out there that had no wobble, I'm willing to bet that was an effect of bad tolerances making the fit too tight, not an effect of them being manufactured well. |
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Posted: 9/1/2014 11:06:04 PM EDT
[#20]
Quote HistoryQuoted:
There's "several" for sale in the EE now. RAS, panels, and VFG for $90. Quote HistoryQuoted:
Quoted:
I picked up a RAS for about $85 in the EE. It didn't come with covers, bag, or VFG but I didn't need them. Be patient and you will probably find one for sub 100. I've not looked for any in awhile. I might pick up another. Thanks for the heads up. 
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Posted: 9/1/2014 11:30:23 PM EDT
[#21]
Cope's has some well used ones for $49, all you'll need to source is a machine screw for the rear clamp. It was perfect for my truck/beater gun.
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Posted: 9/1/2014 11:57:04 PM EDT
[#22]
KAC M4 RAS seconds. $150 directly from KAC, only problem with them is that the finish is off a bit, but for a beater gun, who cares, right?
http://knightarmco.com/shop/index.php?main_page=product_info&products_id=32 |
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Posted: 9/2/2014 12:03:51 AM EDT
[#23]
The RAS is one of the few drop in rails I'd trust to mount an IR laser or optic onto. For most of us, neither are a requirement. Do you plan on using it for a VFG and weaponlight? If that's the case any decent rail will do, but the RAS is a great choice.
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Posted: 9/2/2014 12:26:00 AM EDT
[#24]
If it's good enough for our boys in the firld, then is more than adequate for the rest of us.
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Posted: 9/2/2014 12:31:13 AM EDT
[#25]
Quote HistoryQuoted:
If it's good enough for our boys in the firld, then is more than adequate for the rest of us. http://i15.photobucket.com/albums/a362/Sablelieger/Weapons/DE9ABB57-B107-4E0C-AAC4-F6AA90C2EAE4_zps3qqyaqmp.jpg I guess we can make this a pic thread. 
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Posted: 9/2/2014 1:08:20 AM EDT
[#26]
Quote HistoryQuoted:
KAC M4 RAS... best drop in rail i have ever used for damn sure. Totally. I LOVE the M4 RAS! I have them on both my Colt 6920s :) |
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Posted: 9/2/2014 2:49:24 AM EDT
[#27]
Quote HistoryQuoted: I'm not sure if you're talking about the PRO model or one of the older chinese manufactured models (UTG rails), but I've had some experience with the older crappy chinese ones. Saw one that had such bad tolerances that it would slip out of the front handguard cap with a little pressure on a mounted VFG without even moving the delta ring. While I'm sure there are some out there that had no wobble, I'm willing to bet that was an effect of bad tolerances making the fit too tight, not an effect of them being manufactured well. Quote HistoryQuoted: Quoted: Keep in mind, the RAS still has wobble. I'll get dog piled over this but UTG's drop-in doesn't even wobble. I'm not sure if you're talking about the PRO model or one of the older chinese manufactured models (UTG rails), but I've had some experience with the older crappy chinese ones. Saw one that had such bad tolerances that it would slip out of the front handguard cap with a little pressure on a mounted VFG without even moving the delta ring. While I'm sure there are some out there that had no wobble, I'm willing to bet that was an effect of bad tolerances making the fit too tight, not an effect of them being manufactured well. It was the US made Pro. Two of them mounted on various uppers at different times. Zero wobble. The point is, KAC is miles above UTG and you would think a zero wobble hand guard would be child's play for them. I have owned at least four RAS setups and all of them had an issue with fitment on the bottom half. They even designed a lower half with the same screw as the top to address the issue (thus adding $100 to the price of the total RAS). The only way I would purchase another RAS is if it was for a safe queen clone.
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Posted: 9/2/2014 2:57:30 AM EDT
[#28]
Quote HistoryQuoted:
It was the US made Pro. Two of them mounted on various uppers at different times. Zero wobble. The point is, KAC is miles above UTG and you would think a zero wobble hand guard would be child's play for them. I have owned at least four RAS setups and all of them had an issue with fitment on the bottom half. They even designed a lower half with the same screw as the top to address the issue (thus adding $100 to the price of the total RAS). The only way I would purchase another RAS is if it was for a safe queen clone. Quote HistoryQuoted:
Quoted:
Quoted:
Keep in mind, the RAS still has wobble. I'll get dog piled over this but UTG's drop-in doesn't even wobble. I'm not sure if you're talking about the PRO model or one of the older chinese manufactured models (UTG rails), but I've had some experience with the older crappy chinese ones. Saw one that had such bad tolerances that it would slip out of the front handguard cap with a little pressure on a mounted VFG without even moving the delta ring. While I'm sure there are some out there that had no wobble, I'm willing to bet that was an effect of bad tolerances making the fit too tight, not an effect of them being manufactured well. It was the US made Pro. Two of them mounted on various uppers at different times. Zero wobble. The point is, KAC is miles above UTG and you would think a zero wobble hand guard would be child's play for them. I have owned at least four RAS setups and all of them had an issue with fitment on the bottom half. They even designed a lower half with the same screw as the top to address the issue (thus adding $100 to the price of the total RAS). The only way I would purchase another RAS is if it was for a safe queen clone. Damn, that sucks. I haven't had any issues with poorly fitting bottom rails on the few rifles I've been issued since I joined .mil or on my personal M4 or M5 RAS. Sounds like you got the "redheaded stepchildren" of the lot. 
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Posted: 9/2/2014 3:11:24 AM EDT
[#29]
Quote HistoryQuoted:
Keep in mind, the RAS still has wobble. I'll get dog piled over this but UTG's drop-in doesn't even wobble. Hmm, I've installed many and never experienced any RAS top rail wobble. The bottom rail on a select few would move just a hair, but most were locked in tight. The top part (main part) was always rock solid due to the front leaf spring and rear allen screw bracket. KAC did come out with a bottom rail piece called the SAS that would fix this issue, but it never moved enough for it to matter in my opinion. Here is a link to the SAS piece: http://www.knightarmco.com/shop/index.php?main_page=product_info&products_id=35 This is only if you happen to get on with a loose bottom rail. |
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Posted: 9/2/2014 8:15:11 AM EDT
[#30]
I knew there was an SAS model with the barrel clamp on it, but I didn't know KAC sold the bottom separately.
Nor did I know they were $100 for just the bottom rail.  Ouch.
Also, no one mentioned the RAS 2? 
It's the RAS with a hump that clamps onto the upper receiver, free-floating the barrel. Limits your optic choices, but it'll fit an ACOG or Aimpoint and Magnifier, plus BUIS, of course. It's $150, BRAND NEW. Same price as a blemished RAS straight from KAC. I think its(The RAS 2) lower rail clamps onto the barrel nut like the SAS version does, too. If you've already chosen your optics and you can deal with the hump, it's well worth the extra couple ounces to free-float your barrel, considering the price. I'm still surprised it never took off with the military. Probably because they have the need to mount night vision and other crap on the upper. |
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Posted: 9/2/2014 8:18:10 AM EDT
[#31]
Quote HistoryQuoted:
KAC M4 RAS... best drop in rail i have ever used for damn sure. +1
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Posted: 9/2/2014 8:27:58 AM EDT
[#32]
Topic Moved
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Posted: 9/4/2014 4:10:26 AM EDT
[#33]
Quote HistoryQuoted:
I knew there was an SAS model with the barrel clamp on it, but I didn't know KAC sold the bottom separately. Nor did I know they were $100 for just the bottom rail. Ouch.
Also, no one mentioned the RAS 2?
It's the RAS with a hump that clamps onto the upper receiver, free-floating the barrel. Limits your optic choices, but it'll fit an ACOG or Aimpoint and Magnifier, plus BUIS, of course. It's $150, BRAND NEW. Same price as a blemished RAS straight from KAC. I think its(The RAS 2) lower rail clamps onto the barrel nut like the SAS version does, too. If you've already chosen your optics and you can deal with the hump, it's well worth the extra couple ounces to free-float your barrel, considering the price. I'm still surprised it never took off with the military. Probably because they have the need to mount night vision and other crap on the upper. Highly probable you won't need the SAS lower rail. Just get the RAS, install it and be happy. |
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Posted: 9/4/2014 7:48:18 AM EDT
[#34]
Quote HistoryQuoted:
Highly probable you won't need the SAS lower rail. Just get the RAS, install it and be happy. Quote HistoryQuoted:
Quoted:
I knew there was an SAS model with the barrel clamp on it, but I didn't know KAC sold the bottom separately. Nor did I know they were $100 for just the bottom rail. Ouch.
Also, no one mentioned the RAS 2?
It's the RAS with a hump that clamps onto the upper receiver, free-floating the barrel. Limits your optic choices, but it'll fit an ACOG or Aimpoint and Magnifier, plus BUIS, of course. It's $150, BRAND NEW. Same price as a blemished RAS straight from KAC. I think its(The RAS 2) lower rail clamps onto the barrel nut like the SAS version does, too. If you've already chosen your optics and you can deal with the hump, it's well worth the extra couple ounces to free-float your barrel, considering the price. I'm still surprised it never took off with the military. Probably because they have the need to mount night vision and other crap on the upper. Highly probable you won't need the SAS lower rail. Just get the RAS, install it and be happy. Wouldn't get one unless I had fitment issues. That's a Benjamin I don't feel like wasting. |
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Posted: 9/4/2014 1:59:39 PM EDT
[#35]
Quote HistoryQuoted:
Wouldn't get one unless I had fitment issues. That's a Benjamin I don't feel like wasting. Quote HistoryQuoted:
Quoted:
Quoted:
I knew there was an SAS model with the barrel clamp on it, but I didn't know KAC sold the bottom separately. Nor did I know they were $100 for just the bottom rail. Ouch.
Also, no one mentioned the RAS 2?
It's the RAS with a hump that clamps onto the upper receiver, free-floating the barrel. Limits your optic choices, but it'll fit an ACOG or Aimpoint and Magnifier, plus BUIS, of course. It's $150, BRAND NEW. Same price as a blemished RAS straight from KAC. I think its(The RAS 2) lower rail clamps onto the barrel nut like the SAS version does, too. If you've already chosen your optics and you can deal with the hump, it's well worth the extra couple ounces to free-float your barrel, considering the price. I'm still surprised it never took off with the military. Probably because they have the need to mount night vision and other crap on the upper. Highly probable you won't need the SAS lower rail. Just get the RAS, install it and be happy. Wouldn't get one unless I had fitment issues. That's a Benjamin I don't feel like wasting. I've never actually seen an SAS lower in person, that's how uncommon they are...and I've seen a lot of RAS set ups. |
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