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Posted: 12/23/2003 8:43:14 PM EDT
I just purchased a RRA 9mm 16 inch carbine upper from a fellow board member on the EE.  It is a postban with a crowned barrel, no brake.  In your experience, do you think it would be worth having the barrel shortened and a flash hider added bringing it to the minimum 16 inch length.  And this will be going on a preban lower.  Bayo lug I could care less about.
Link Posted: 12/23/2003 9:23:47 PM EDT
A 16" 9mm? Does it have any flash now?
Link Posted: 12/24/2003 3:59:39 AM EDT
That's a good question, I don't have it yet.  Was wondering if folks here would have any experience on this.  I can't imagine it would have much, so other than the coolness factor it might serve no purpose, and would actually limit which lowers it could go on.  Definitely no need for a brake on it.
Link Posted: 12/24/2003 4:05:06 AM EDT
Flash hider is not needed on any pistol caliber uppers that I have, .45 and 9mm. other than cool factor.

Paul.
Link Posted: 12/24/2003 4:12:18 AM EDT
Thanks Paul, just what I was looking for.  I think it will look bling bling enough on the preban lower with telestock, M4 RAS, KAC verticle grip and maybe a light system...  Gettin psyched!
Link Posted: 12/24/2003 8:15:12 AM EDT
Originally Posted By HiramRanger:
Thanks Paul, just what I was looking for.  I think it will look bling bling enough on the preban lower with telestock, M4 RAS, KAC verticle grip and maybe a light system...  Gettin psyched!
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With 10 lbs of accessories hanging from it the recoil is going to feel like a .22lr! [;)]
Link Posted: 12/24/2003 11:56:41 AM EDT
My olympic sports a brake but its for looks only,this thing has no recoil.
Link Posted: 12/24/2003 12:18:05 PM EDT
Another option (assuming you want a flash hider):  have the barrel threaded so you don't have to permamently attach anything.  You just need to keep it on a preban lower until next fall.  

Nothing against crowned muzzles, but if you're going to add all that high-end stuff anyways, you might as well go all the way.
Link Posted: 12/24/2003 2:06:00 PM EDT
[Last Edit: 12/24/2003 2:06:28 PM EDT by amphibian]
Another option is to thread the barrel then "permanently (silver solder)" attach a 3 lug adapter to the threaded barrel so you won't have to worry if you put the barrel on a POST ban lower.  
You can then put on a 3 lug flash hider or if it goes on a postban, a 3 lug Muzzlebreak.
Below is a picture of mine on my RR Colt.  It is showing a 3lug flash hider from Gemtech (no longer made).
[img]http://home.cfl.rr.com/c3stuff/m16/colt_curved.jpg[/img]
Link Posted: 12/24/2003 3:12:39 PM EDT
Another option is the thread it for a can.
Link Posted: 12/24/2003 4:25:23 PM EDT
What type of mags are those curved puppies and what block takes them?
Link Posted: 12/25/2003 3:04:23 PM EDT
They are curved madsen mags.
Any block works.  I mainly use factory Colt mags for the bolt hold open feature which is handy for SMG competitions.
I have all the details here:
[url]http://www.c3junkie.com[/url]
Link Posted: 12/25/2003 3:12:44 PM EDT
Neat, I just checked that site out.  Are the modified Suomi mags legal?  I mean, you welt the colt mag on and you no longer can use the Suomi mag in its original weapon can you?
Link Posted: 12/25/2003 4:10:43 PM EDT
[Last Edit: 12/25/2003 4:11:32 PM EDT by amphibian]
All my suomi/M16 9mm and suomi/Uzi drums are PREBAN.  They were made before 1994.  
You are correct, you cannot do that today.
Link Posted: 12/25/2003 7:26:09 PM EDT
I would put somthing on the barrel just for looks.

Every time I see a crowned barrel, the rifle just looks like it's missing somthing. Dos'nt matter how many other goodies are on it.
Link Posted: 12/25/2003 9:12:45 PM EDT
Back when I had a 16" 9mm I had No flash whatsoever...Now that It's a 10" 9mm I have a very little flash...Curiously The rifle runs a lot cleaner with 6"'s less barrel as well....UNDERDOG
Link Posted: 12/29/2003 8:02:51 PM EDT
This may be too "retro" considering all the 21st Century AR stuff you're going to stick on there, but what I wanted to do with one I JUST let slip through my fingers [>(] was to have the barrel shortened to either 11.5" or 12.5" and add a 5.5" or 4.5" CAR style supressor on it.  

Like Underdog mentioned, there are definite benefits to having a short bbl on your 9mm AR as opposed to 5.56.  It weighs less, runs cleaner, and while I don't know for sure, I would suspect that muzzle velocity might be a little HIGHER from a 10" - 12" bbl than from a 16"????
Link Posted: 12/30/2003 5:00:31 AM EDT
Car style flash suppressor... now that sounds interesting... but once done it will forever have to be on a preban lower...  still, could be pretty bad ass!
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