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Posted: 8/19/2005 8:47:50 PM EDT
Is there a purpose for this barrel profile?  It seems they just machined a chunk out of the barrel.  I thought it was threaded for purhaps a can but it is never mentioned.
Link Posted: 8/19/2005 9:00:27 PM EDT
[#1]
What's an R4?

(not being wise, is it like an M4 or something?)
Link Posted: 8/19/2005 9:50:42 PM EDT
[#2]
You talking about RRA?


In theory, it is for the M203 grenade launcher that is mounted on the military M4's.

WIZZO
Link Posted: 8/19/2005 11:54:47 PM EDT
[#3]
r4-m4 whatever




its to support the m203 sorta like an index for the mount like wizzo has stated
Link Posted: 8/20/2005 12:10:33 PM EDT
[#4]
yes I am talking about thr RRA.  So does the gernade launcher attach to the barrel in that spot?
Link Posted: 8/20/2005 12:33:29 PM EDT
[#5]
yes
Link Posted: 8/20/2005 1:12:12 PM EDT
[#6]
The R4 is threaded and can be chrome lined as an option.

It is however, heavy under the handguards. I personally like this profile and was going to have the HBAR profile under the handguards turned down to a medium width to get the SOCOM M4A1 barrel profile.

It does have the M203 step on the muzzle end of the barrel.
Link Posted: 8/20/2005 1:30:18 PM EDT
[#7]

Quoted:
yes I am talking about thr RRA.  So does the gernade launcher attach to the barrel in that spot?



Yes. The front mounts there and the rear of the 203 mounts under the handguards on the barrel.

WIZZO
Link Posted: 8/20/2005 5:00:28 PM EDT
[#8]
the front of the 37mmlauncher/m203  has a bracket hangs on the notch and the rear holds onto the barrel nut/deltaring
Link Posted: 8/20/2005 11:53:17 PM EDT
[#9]

Quoted:
the front of the 37mmlauncher/m203  has a bracket hangs on the notch and the rear holds onto the barrel nut/deltaring



as seen here

Link Posted: 8/21/2005 1:38:32 AM EDT
[#10]

Quoted:

Quoted:
the front of the 37mmlauncher/m203  has a bracket hangs on the notch and the rear holds onto the barrel nut/deltaring



as seen here

www.colt.com/mil/images/M203.jpg




well thats an actual m203. im referring to the clone 37mm launcher
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