9MM AR MASTER THREAD
- MCASSgt New River
- Silent But Deadly
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- Joined: Sat Feb 02, 2008 11:02 am
- Location: Richlands, NC
My .02
What I currently have up and running:
RRA LAR-15 lower
RRA 9mm upper 16"
RRA ramped bolt
RRA bottom load mag block
9mm hammer
Uzi mags (that I mod'd)
This set up works well and has proven to be accurate out to 50yrds with WWB using a Eotech.
Items I have on-hand for my SBR conversion:
C3 Defense billet stripped SBR lower
RRA 9mm upper
RRA 10.5" barrel (I will have cut to 7")
YHM Specter length FF handguards
Gemtech 9mm MultiMount Suppressor (in both 3-lug & 1/2x28)
I will take the bolt, mag block and mag's from the other weapon to complete this build mean while I'll send off the 16" upper to either SRT or Anvil to build it into a integrally suppressed upper.
Now if I was back at home instead of Iraq I'd be happy to build this and take some pics for ya'll but I digress I can not....look for pics in 6 or so months!
RRA LAR-15 lower
RRA 9mm upper 16"
RRA ramped bolt
RRA bottom load mag block
9mm hammer
Uzi mags (that I mod'd)
This set up works well and has proven to be accurate out to 50yrds with WWB using a Eotech.
Items I have on-hand for my SBR conversion:
C3 Defense billet stripped SBR lower
RRA 9mm upper
RRA 10.5" barrel (I will have cut to 7")
YHM Specter length FF handguards
Gemtech 9mm MultiMount Suppressor (in both 3-lug & 1/2x28)
I will take the bolt, mag block and mag's from the other weapon to complete this build mean while I'll send off the 16" upper to either SRT or Anvil to build it into a integrally suppressed upper.
Now if I was back at home instead of Iraq I'd be happy to build this and take some pics for ya'll but I digress I can not....look for pics in 6 or so months!
A veteran is someone who, at one point in his life, wrote a blank check made payable to 'The United States of America' for an amount of 'up to and including their life.'-That is Honor
Re: My .02
Worry about getting home safe leather neck (jar head). That's alot to look forward to . Range report on return. Devil doc (2/6 echo CO weapons plt SOC) Errr!MCASgt New River wrote:What I currently have up and running:
RRA LAR-15 lower
RRA 9mm upper 16"
RRA ramped bolt
RRA bottom load mag block
9mm hammer
Uzi mags (that I mod'd)
This set up works well and has proven to be accurate out to 50yrds with WWB using a Eotech.
Items I have on-hand for my SBR conversion:
C3 Defense billet stripped SBR lower
RRA 9mm upper
RRA 10.5" barrel (I will have cut to 7")
YHM Specter length FF handguards
Gemtech 9mm MultiMount Suppressor (in both 3-lug & 1/2x28)
I will take the bolt, mag block and mag's from the other weapon to complete this build mean while I'll send off the 16" upper to either SRT or Anvil to build it into a integrally suppressed upper.
Now if I was back at home instead of Iraq I'd be happy to build this and take some pics for ya'll but I digress I can not....look for pics in 6 or so months!
- Dark Tranquility
- Elite Member
- Posts: 692
- Joined: Thu May 19, 2005 11:15 pm
- Location: Florida
It looks like RRA is now making 9mm lowers with no mag block. It doesn’t say if they use Colt magazines but I would assume so.
http://www.rockriverarms.com/index.cfm? ... ory_id=241
Dan
http://www.rockriverarms.com/index.cfm? ... ory_id=241
Dan
- Dark Tranquility
- Elite Member
- Posts: 692
- Joined: Thu May 19, 2005 11:15 pm
- Location: Florida
Doing 9mm is obviously not part of the original intent of the firearm, considering the funny placement of tiny magazines into the magwell. A lot of people find different Colt pattern mags to sit too low or too high or some angle that does not allow feeding. Often you can just adjust your magwell and the mags sit right.
With this setup, you can't adjust your magwell. So if the mags you buy don't work perfectly, you have to mod the mags. I've seen Promags, CProducts mags, and Metalform not fit the new magwell (on the internet). And people that have modded Uzi mags for their old gun have them not work in the new one, stuff like that. If your plan is to mod Uzi mags and not have a LRBHO, then this is no problem at all. But if you have another 9mm AR, you may find that you can't use the same mags in both guns.
With this setup, you can't adjust your magwell. So if the mags you buy don't work perfectly, you have to mod the mags. I've seen Promags, CProducts mags, and Metalform not fit the new magwell (on the internet). And people that have modded Uzi mags for their old gun have them not work in the new one, stuff like that. If your plan is to mod Uzi mags and not have a LRBHO, then this is no problem at all. But if you have another 9mm AR, you may find that you can't use the same mags in both guns.
FWIW, the Colt mag block is pinned in place and not adjustable.
I would only be worried about being able to adjust the mag block if I was looking to use sub-standard magazines.
Unfortunately, if the internet rumors are true, sub-standard magazines may be all that's available.
I would only be worried about being able to adjust the mag block if I was looking to use sub-standard magazines.
Unfortunately, if the internet rumors are true, sub-standard magazines may be all that's available.
WWW.TACTICALYELLOWVISOR.NET
- MCASSgt New River
- Silent But Deadly
- Posts: 598
- Joined: Sat Feb 02, 2008 11:02 am
- Location: Richlands, NC
I'm running a RRA bottom loading mag block that allows me to use the mag release as it should be used. I managed to mod my uzi mags by dissassembling them and matching them up to one of my Colt mags. I penciled in the mag release and the relief for the last round bolt hold open the best I could for starters.
Being an extreme novice, self-proclaimed, smith I ripped into them with my dremel tool, with sparks a'flying! Every single mag seats, feeds and operates almost perfectly with minimal to no wobble or slop.
The mod process got easier as I did them so don't worry too much, it's so easy a cave man can do it. Cosmetically they got better as I worked through the six mags that needed the mod. Now I'm a happy owner of 6 32-round mags that I made myself.
Being an extreme novice, self-proclaimed, smith I ripped into them with my dremel tool, with sparks a'flying! Every single mag seats, feeds and operates almost perfectly with minimal to no wobble or slop.
The mod process got easier as I did them so don't worry too much, it's so easy a cave man can do it. Cosmetically they got better as I worked through the six mags that needed the mod. Now I'm a happy owner of 6 32-round mags that I made myself.
A veteran is someone who, at one point in his life, wrote a blank check made payable to 'The United States of America' for an amount of 'up to and including their life.'-That is Honor
Spikes gets there 9mm mags from the same maker that Colt used torob_s wrote:FWIW, the Colt mag block is pinned in place and not adjustable.
I would only be worried about being able to adjust the mag block if I was looking to use sub-standard magazines.
Unfortunately, if the internet rumors are true, sub-standard magazines may be all that's available.
and they are exactly the same as my older Colts.
.
http://www.spikestactical.com/z/index.p ... cts_id=216
.rob_s wrote:and at $40+/ea I would tend to believe you!
The best mags for you because I know how much love you have
for CProd
The maker for the old Colt and the Spikes
http://metalformcompany.thomasnet.com/i ... 4?&seo=110
- Dark Tranquility
- Elite Member
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- SturmGrenadier
- Senior Silent Operator
- Posts: 127
- Joined: Sat Apr 18, 2009 4:26 pm
- Location: Texas
Update on my 9mm AR:
~The CProducts plastic magblock was a piece of crap that did not work in 3 of my guns. I returned it, they sent me a check that cleared.
~The RRA magblock worked since I put it flush with the lower, it just works.
~The CProducts mags work perfectly. One of them had extra weld material that stopped it from being loaded into the magwell. I took a file to it, and it works as flawlessly as the other four that I have. The finish isn't perfect, but I've yet to have sexual intercourse with a man, so it doesn't bother me.
~The highly used lower that I purchased had some slightly egged hammer pin holes, so I went to KNS anti rotate pins to stop the pins from walking constantly.
The gun has had no problems since replacing the CProducts plastic magblock with the RRA one. I haven't had to adjust anything other than filing that bit of metal off of one magazine.
~The CProducts plastic magblock was a piece of crap that did not work in 3 of my guns. I returned it, they sent me a check that cleared.
~The RRA magblock worked since I put it flush with the lower, it just works.
~The CProducts mags work perfectly. One of them had extra weld material that stopped it from being loaded into the magwell. I took a file to it, and it works as flawlessly as the other four that I have. The finish isn't perfect, but I've yet to have sexual intercourse with a man, so it doesn't bother me.
~The highly used lower that I purchased had some slightly egged hammer pin holes, so I went to KNS anti rotate pins to stop the pins from walking constantly.
The gun has had no problems since replacing the CProducts plastic magblock with the RRA one. I haven't had to adjust anything other than filing that bit of metal off of one magazine.
Last edited by Twinsen on Fri Nov 20, 2009 6:41 am, edited 1 time in total.
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- Silent But Deadly
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The main differences between the 9mm uppers are that the 9mm upper has no integral brass deflector as the brass deflector is a plastic piece attached via the ejection port cove pivot pin. The other difference is that there is no hole in the front of the upper for the gas tube.
WWW.TACTICALYELLOWVISOR.NET
Yes! Thank you. Should have recalled that.Twinsen wrote:And often 9mm uppers have no hole for the forward assist either.
To the OP, 9mm uppers are essentially "slick side" in that they have no brass deflector and no forward assist. They lack the gas tube hole in the front because the 9mm AR does not use a gas tube.
WWW.TACTICALYELLOWVISOR.NET
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- Silent But Deadly
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- Location: Eugene Or.
It's the only one I've had that works, I've never been near a Hahn. I know that the Hahn has feed ramp cuts like an M4 barrel and that the RRA doesn't. I also know that hasn't stopped my RRA mag block from being literally 100% reliable.
My gun jammed when it got very very dirty once, and it would fail to chamber another round when cycling every single try. I took out the bolt, rubbed the face against the palm of my hand to remove a large chunk of s--t, and then it functioned perfectly every shot since. It's hard to believe it isn't that dirty again, because the fire control group of this thing looks like the wheel well of a monster truck.
I'll dig up pictures for you of the differences that I see in them. Although everything RRA that I've touched has impressed me, maybe that isn't hard to do.
Mother effer, I go and take pictures of my gun and yahoo image search beats me.
RRA:
Hahn:
The RRA doesn't have those little feed ramp cuts.
I need an excuse to post pics of how dirty that gun is. The crack between the upper and lower around the bolt buffer is just filled with green and black s--t. There's never been any movement between the two, but now opening and closing the two scrapes junk off. I've never had a centerfire this dirty, and I've shot them all much more than this one. Edit: Screw it, that was too fun to not post.
Most of the crud is on the inner sides of the receivers, so it isn't in the picture.
My gun jammed when it got very very dirty once, and it would fail to chamber another round when cycling every single try. I took out the bolt, rubbed the face against the palm of my hand to remove a large chunk of s--t, and then it functioned perfectly every shot since. It's hard to believe it isn't that dirty again, because the fire control group of this thing looks like the wheel well of a monster truck.
I'll dig up pictures for you of the differences that I see in them. Although everything RRA that I've touched has impressed me, maybe that isn't hard to do.
Mother effer, I go and take pictures of my gun and yahoo image search beats me.
RRA:
Hahn:
The RRA doesn't have those little feed ramp cuts.
I need an excuse to post pics of how dirty that gun is. The crack between the upper and lower around the bolt buffer is just filled with green and black s--t. There's never been any movement between the two, but now opening and closing the two scrapes junk off. I've never had a centerfire this dirty, and I've shot them all much more than this one. Edit: Screw it, that was too fun to not post.
Most of the crud is on the inner sides of the receivers, so it isn't in the picture.
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- Silent But Deadly
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- Location: Eugene Or.
- seacoastnh
- Elite Member
- Posts: 367
- Joined: Thu Mar 13, 2008 5:20 pm
Does the RRA 9mm lower with the integral magwell on the RRA website have the same magwell as the one in your picture only permanently installed?Twinsen wrote:It's the only one I've had that works, I've never been near a Hahn. I know that the Hahn has feed ramp cuts like an M4 barrel and that the RRA doesn't. I also know that hasn't stopped my RRA mag block from being literally 100% reliable.
http://www.rockriverarms.com/popup.cfm? ... ow_pop.gif
http://www.rockriverarms.com/index.cfm? ... N=62645791