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Posted: 2/27/2006 7:37:37 PM EDT
I have 16'' M4 profile barrell that I was told was a RRA piece. How do I tell? There are no markings behind the flash hider like a colt. Are they under the handguards? I haven't looke there.

Thanks.
Link Posted: 2/27/2006 7:41:02 PM EDT
my RRA bbls had no markings either...
Link Posted: 2/27/2006 7:42:51 PM EDT

Originally Posted By ALPHAGHOST:
my RRA bbls had no markings either...




+1 I have two, both coming directly from RRA both non marked.
Link Posted: 2/27/2006 7:51:45 PM EDT
Under the handguards. Look in the RRA forum for the codes.

Cheers,

Phil
Link Posted: 2/27/2006 7:56:11 PM EDT
Look under the hand guard... If its the M4 profile 16" it will be marked either N9A, N9C, 202 or 204...

N9A:
N = 5.56 NATO chamber
9 = 1/9 twist
A = Chrome Moly NOT chrome lined

N9C:
N = 5.56 NATO chamber
9 = 1/9 twist
C = Chrome Moly and Chrome Lined

202:
5.56 NATO chamber
1/9 twist
Chrome Moly NOT chrome lined

204:
5.56 NATO chamber
1/9 twist
Chrome Moly and Chrome Lined
Link Posted: 2/27/2006 7:59:07 PM EDT
[Last Edit: 2/27/2006 8:00:09 PM EDT by WIZZO_ARAKM14]
Under the handguards, on top of the chamber. If it's more than a year or so old, it will have a letter, a number, and a letter. If it's a newer barrel, it will have 3 numbers.

Here's what the markings mean if they are there:


Applicable "codes" for 223 barrels:

Old Codes:
Three characters side by side over the chamber.
First Character: N or W...N for NATO chamber or W for Wylde
Second Character: 8 or 9...8 for 1:8 twist and 9 for 1:9 twist.
Third Character: A, S, or C...A for moly (chrome -moly Alloy), S for Stainless, and C for Chrome-lined alloy.

New Codes:
The actual base part number from our parts system/catalog, located over the chamber. These are the most common. Unless indicated otherwise, all stainless barrels are 1:8 twist and all moly barrels (chrome-lined or not)are 1:9. All 16" moly barrels have a NATO chamber, while the 20" moly and all stainless barrels have a Wylde chamber.

200 =moly CAR
200CL =Chrome-lined CAR
202 =moly R4
204 =Chrome-lined R4
206 =Stainless CAR
208 =16" varmint
210 =moly Mid
212 =Chrome-lined Mid
215 =Stainless Mid
218 =18" varmint
220 =moly Std (rifle)
222 =Stainless NM(rifle)
223 =Stainless NM (rifle), unthreaded
226 =20" varmint
228 =24" varmint (1:8)
229 =24" varmint (1:12)



Quoted from Steve/RRAMODERATOR HERE.

WIZZO

EDIT: beat by theshootersden
Link Posted: 2/27/2006 8:00:13 PM EDT
So they are marked or are some of them not. Or did the other guys not look under their handguards? Now I just have to find a third hand to remove the handguards carefully as I dont have a wrench yet.

Thanks guys I am learning alot.

Link Posted: 2/27/2006 8:03:28 PM EDT
It's easy to overlook 3 characters on top of the chamber, especially with the gas tube in the way.

WIZZO
Link Posted: 2/27/2006 8:07:13 PM EDT
[Last Edit: 2/27/2006 8:08:24 PM EDT by theshootersden]

Originally Posted By WIZZO_ARAKM14:
EDIT: beat by theshootersden



Link Posted: 2/27/2006 8:10:42 PM EDT
AWESOME I DID IT! IT WAS HARD BUT COOL. MINE IS STAMPED N9C. THAT MEANS I NAVE A NATO CHAMBER, 1/9 TWIST AND A CHROME LINED BARRELL RIGHT.

Thanks Alot.
Link Posted: 2/27/2006 8:12:46 PM EDT

Originally Posted By dav257:
AWESOME I DID IT! IT WAS HARD BUT COOL. MINE IS STAMPED N9C. THAT MEANS I NAVE A NATO CHAMBER, 1/9 TWIST AND A CHROME LINED BARRELL RIGHT.

Thanks Alot.



You got it...
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