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Posted: 9/25/2003 10:48:20 PM EDT
[#1]
RASII advantages:
its secure enough to mount optics or lasers on.. the ras isn't.. it also freefloats the barrel [i]and[/i] is easy to install.. big advantage over lots of freefloat stuff (like freefloat RAS) that needs to be gunsmith-installed.. as for the Aimpoint idea, the little bridge on the RASII is perfect for mounting the Aimpoint.. |
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Posted: 9/25/2003 10:58:40 PM EDT
[#2]
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I have both so short and simple: The RAS 2 is around $30 more and worth it. As mentioned above the RAS 2 free floats the barrel (BIG+) and mounts SOLID to the upper (BIG+). While the top of the M4 RAS is fairly solid, due to the way the bottom rail mounts it leaves a little play side to side. This is very noticeable when using a vertical grip, but it's not horrible. As far as the "hump" being in the way, it really just depends on your sighting system. A traditional scope + hump = problem. An aimpoint or ACOG + hump = no problem. Check with the dealers on the board or in the EE for good deals on both. Ray [URL]http://ar15.com/forums/topic.html?b=3&f=118&t=170868[/URL] This was from a RAS Vs. RAS II post a day or two back. |
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Posted: 9/26/2003 3:58:42 AM EDT
[#3]
agree 100%. While there's nothing wrong with the RAS, the RAS 2 is the superior system and easily worth the small added cost.
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Posted: 9/26/2003 5:57:57 AM EDT
[#4]
The RAS II is my favorite system...
C4 |
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Posted: 9/26/2003 6:09:11 AM EDT
[#5]
So the bottom rail is rock solid on the II?..and it installs without removing anything? Does it use the Delta ring? I've yet to inspect one of these in person. Anyone fit the hump UNDER a LR scope? (1 med/high ring in front; 1 ring behind?)
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Posted: 9/26/2003 8:01:08 PM EDT
[#6]
I'm thinking eye relief would be a problem if you did this.
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Posted: 9/27/2003 5:01:24 AM EDT
[#7]
THE LOWER RAIL ON THE RAS II IS INDEED SOLID. IT IS HELD IN PLACE BY TWO TABS UP FRONT THAT SECURE INTO SLOTS IN THE LEFT AND RIGHT QUADRANTS. AT THE REAR, A STEEL TAB WITH A BUTTON HEAD ALLEN SCREW SLIPS UNDER THE BARREL NUT AND TAKES TENSION THERE. TWO STEEL PINS RUNNING LONGITUDINALLY AT THE REAR OF THE LOWER RAIL QUADRANT ALIGN WITHIN SLOTS IN THE BARREL NUT FOR FURTHER RIGIDITY. ON TOP OF ALL THAT, THE DELTA RING SLIPS OVER THE BACK OF THE RAS II AND STILL DOES ITS THING.
THE RAS II ONLY WEIGHS 14.1 OZ. DAVE LUTZ OF KAC SENT ME A PIC OF A LEUPOLD MK IV MOUNTED ON A RAS II EQUIPPED CARBINE, USING KAC SR-25 RINGS. ONE RING WAS FORWARD OF THE BRIDGE AND OF COURSE ONE WAS AFT. BUT IT WOULD REQUIRE A GOOD-SIZED SCOPE TO DO THIS. REALISTICALLY, OTHER THAN ACCURACY TESTING, WHAT IS THE PRACTICAL APPLICATION OF A BIG SCOPE ON A LITTLE CARBINE? THE TRIJICON ACOGS WORK FINE WITH THE RAS II. AND THE RAS II, BY FREE-FLOATING THE BARREL, WORKS FINE WITH THE TRIJICON ACOGS, TYPICALLY DECREASING GROUP SIZE BY 30 - 40%. I AM SENDING AN ORDER OF LMT 10.5" UPPERS OUT. ONE IS ESPECIALLY EQUIPPED WITH THE RAS II AND A PRI STANDARD HEIGHT AIMPOINT RING ON THE BRIDGE, THE IDEAL WAY TO MOUNT AN AIMPOINT. WILL TRY TO GET A PIC UP. |
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Posted: 9/27/2003 6:31:03 AM EDT
[#8]
Wes - Do you remove the front handguard cap when you install the RAS II?
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Posted: 9/27/2003 8:05:55 AM EDT
[#9]
Wes, thanks for the explanation. I was considering a rifle length RASII. I agree magnified optics aren't necessary on a carbine. I've never trusted mounting optics anywhere but the upper receiver. If the RASII is solid enough I might give it a shot with a Loopy on a 20" project I'm planning.
Whoops! Do they even make one? Come to think of it I would probably seen some SPR pics like this by now if it was possible... |
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Posted: 9/27/2003 8:57:09 AM EDT
[#10]
Can the RAS II be installed without the help of a gunsmith? does it do away with the delta ring? I am considering one also, and my pre-ban Eagle carbine has the A-2 upper, but may go with a flat top upper to install the RAS II. What ARMS flip up sight would work with this system?
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Posted: 9/27/2003 10:10:26 AM EDT
[#11]
FlyNavy,
It might be kind of cool, but there’s no rifle length RAS 2. I believe this is due to the URX . Cyclone, Yes, the RAS 2 can be (is) installed without a gunsmith. It is very easy and only takes a few minutes. The RAS 2 goes around the delta ring, so yes you keep it. The ARMS #40 rear sight works fine with the RAS 2. RAS 2 pictures. [url]http://ar15.com/forums/topic.html?b=3&f=12&t=167668[/url] Ray |
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Posted: 9/27/2003 10:45:06 AM EDT
[#12]
RAY,
RIGHT ON, 100%. THANKS. SUB, I MIGHT JUST LEAVE THE HANDGUARD CAP IN PLACE. THE RAS II GOES ON SO BEAUTIFULLY IN FIVE MINUTES MAX THAT IT SEEMS A SHAME TO ADD THE STEPS OF PULLING THE FLASH SUPPRESSOR AND FRONT SIGHT TOWER IN ORDER TO REMOVE THE HANDGUARD CAP. IF I WAS GOING TO GO TO THAT MUCH TROUBLE, I MIGHT CONSIDER OPTING FOR THE KAC M4 SHORT FF RAS. PLUS, THE FOREND CAP WOULD TEND TO KEEP CRUD OUT WHEN GETTING DOWN AND DIRTY. OF COURSE, ONEC INSIDE THE FOREND, IT WOULD HELP TO KEEP IT IN, TOO. IT'S YOUR CALL! S/F- WES |
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Posted: 9/27/2003 12:01:17 PM EDT
[#13]
RAS2, Aimpoint on the hump, EOTech up front and ACOG behind the hump, best of all the world plus free float capability.
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Posted: 9/27/2003 12:11:16 PM EDT
[#14]
And if you put 'em all on at the same time you've got triple redundant backup before you even think about going to irons!
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Posted: 9/27/2003 12:31:56 PM EDT
[#15]
Maybe I'm missing something, but how do you get it on without taking the upper apart? Do you have to take the barrel off the upper receiver?
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Posted: 9/27/2003 1:15:17 PM EDT
[#16]
GlockShooter, no need to take the barrel off, the RAS II comes apart...
C4 |
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Posted: 9/27/2003 1:17:41 PM EDT
[#17]
The RAS clamp on to the receiver with the hump which secure the RAS2 onto the receiver rail. the rear of the upper handguard section slip into the delta ring just as a regular handguard. and tighten the clip inside the handguard just like the RAS. then the bottom handguard section slip into a rail slot machine to the upper handguard and the rear of the bottom handguard system slip into the delta ring as well. there is a clip inside the lower handguard just like the top handguard which you use the allen screw to tight the handguard against the barrel nut like the SAS RAS handguard upgrade.
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Posted: 9/27/2003 2:00:45 PM EDT
[#18]
Check out this link. It tells about the RASII, and shows some good pictures of it off the carbine.
http://quarterbore.com/kac/kacrasii.html I thought it had a link to the actual instructions to install it, but I haven't looked at it since I actually bought and installed mine. |
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