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Durkin Tactical Franklin Armory
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Posted: 10/11/2009 5:15:25 PM EDT
Had dinner with Mack and Cory Friday night. Saw the newly redesigned QCB upper. NICE!!!!  The upper and rail system are now one forging with the rails being solid instead of machined out in the middle. The locking cams have been "tweaked" to allow easier closing, considering the slight variations in barrel extension flange tolerances. The inside of the top rail has been relief machined to accept the CMMG piston conversion....VERY COOL! Lastly the ejection port has been opened up to allow better clearance for spent cases such as 45acp. The unit looks exceptionally clean. I told Mack that he "nailed it"! Already ordered mine.
Steve
Link Posted: 10/11/2009 5:17:53 PM EDT
[#1]
Okay, then.  

.
.
Link Posted: 10/11/2009 5:31:30 PM EDT
[#2]
No photos???
Link Posted: 10/11/2009 5:47:23 PM EDT
[#3]
I really like mine which I received last month!  It was worth the wait and I like it better than the gen1 MGI QCB I already had!
Link Posted: 10/11/2009 6:04:14 PM EDT
[#4]
So where are the Picts
Link Posted: 10/11/2009 6:09:19 PM EDT
[#5]
IBTTTIUWPI
In Before The "This Thread Is Useless Without Pics Icon"
Link Posted: 10/11/2009 6:25:33 PM EDT
[#6]
I have no clue what your talking about but sounds good!
Link Posted: 10/11/2009 6:30:44 PM EDT
[#7]
I think he's talking about this

http://www.mgimilitary.com/qcb.htm
Link Posted: 10/11/2009 6:32:18 PM EDT
[#8]
I personally wouldn't spend my money on it. It's interesting to say the least...
Link Posted: 10/11/2009 6:41:06 PM EDT
[#9]
Quoted:
I think he's talking about this

http://www.mgimilitary.com/qcb.htm

OK now i see, QCB Quick Change Barrel...very interesting!

Link Posted: 10/11/2009 6:42:06 PM EDT
[#10]
Yeah the MGI upper is sweet, i have one and love it. Here's a pic of my setup for you guys. I moved the locking levers to the top so i could use my Surefire light also.  
Link Posted: 10/11/2009 7:23:53 PM EDT
[#11]
I have to say that I REALLY like the locking levers on the top of the handguard.  That MGI Upper is some spiffy stuff.
Link Posted: 10/12/2009 1:36:25 PM EDT
[#12]
Link Posted: 10/12/2009 1:59:19 PM EDT
[#13]
sorry, but if you have other barrels, what's the point of this system..? adding a upper receiver per barrel  to have different "full uppers" would only cost 150$ for each...

sorry if I dont get it.
Link Posted: 10/12/2009 2:00:01 PM EDT
[#14]
sorry, double-
Link Posted: 10/12/2009 2:09:10 PM EDT
[#15]
Quoted:
sorry, but if you have other barrels, what's the point of this system..? adding a upper receiver per barrel  to have different "full uppers" would only cost 150$ for each...

sorry if I dont get it.


In my, case I needed a rifle that was of a mission specific configuration to fit in a brief case when dissembled.

http://www.ar15.com/forums/topic.html?b=3&f=124&t=299092

scroll down a little.
Link Posted: 10/12/2009 2:17:11 PM EDT
[#16]
Ok, that makes sense. I understand.
Link Posted: 10/12/2009 2:54:41 PM EDT
[#17]
Quoted:
sorry, but if you have other barrels, what's the point of this system..? adding a upper receiver per barrel  to have different "full uppers" would only cost 150$ for each...

sorry if I dont get it.


7.62x39 16" and 7.5", 5.45x39 16" and 7.5", 5.56 16" 10.5" and 7.5", 6.8 16" 10.5" and 7.5", 6.5 16" and 20", .22 5" and 16", 45acp 5" and 16", 9mm 5" and 16"

18 x $150 = $2700

If your the kind of guy who will own more than 3-4 ARs the full MGI system will pay for itself.  If not then its not for you.

I can't wait to get a DIAS for it.
Link Posted: 10/12/2009 3:09:10 PM EDT
[#18]
I'd rather an MRP or VIS but I don't have much a desire to shoot more than 3 calibers from an AR platform. Cool concept for anyone who wants to have it all in "one package."
Link Posted: 10/12/2009 3:30:26 PM EDT
[#19]
Quoted:
I'd rather an MRP or VIS but I don't have much a desire to shoot more than 3 calibers from an AR platform. Cool concept for anyone who wants to have it all in "one package."


Both Vltor and LMT advise NOT to preform repeated barrel changes.  The MGI is the only one that offers repeated barrel changes and does it without tools.
Link Posted: 10/12/2009 4:03:55 PM EDT
[#20]
Mack is going to e-mail me some pics of the new system. As soon as I get them I'll upload and post them. I think most everyone will like the upgrades.
Steve
Link Posted: 11/4/2009 2:42:47 PM EDT
[#21]
Quoted:
sorry, but if you have other barrels, what's the point of this system..? adding a upper receiver per barrel  to have different "full uppers" would only cost 150$ for each...

sorry if I dont get it.


You're leaving out the cost of rail systems, back-up sights, optics, etc.

Link Posted: 11/4/2009 2:59:53 PM EDT
[#22]
Quoted:
Quoted:
I'd rather an MRP or VIS but I don't have much a desire to shoot more than 3 calibers from an AR platform. Cool concept for anyone who wants to have it all in "one package."


Both Vltor and LMT advise NOT to preform repeated barrel changes.  The MGI is the only one that offers repeated barrel changes and does it without tools.


Also you need a proprietary barrel with those systems, whereas the MGI uses stock barrels.  I'm interested in seeing what they are bringing out, but I really wish MGI as a whole would get it's act together and reestablish a presence here on ARFCOM.  When I did my business with them, I worked entirely through Tom L. (TWL), and since they were an Industry Partner he made sure to keep us appraised of what was going on.  I really miss working with Tom, he really understood how to take care of customers.

That said, since I already have a 1st and a 2 gen MGI QCB uppers both mounted on MGI Modular lowers, I don't really see myself buying another upper just because of the tweaks.  Sure, the piston mod sounds nice but it would have to be dedicated to a single barrel and I think it would more trouble then it's worth to have to swap back and forth from Piston to DI innards.  For that I think I'd just build a dedicated upper with the piston assembly installed.
Link Posted: 11/4/2009 4:05:44 PM EDT
[#23]
my question is this.  Do the barrels shoot to  the same point of impact?  if not then you really only have one reliable removable barrell.
Link Posted: 11/4/2009 5:28:28 PM EDT
[#24]
Quoted:
Quoted:
I'd rather an MRP or VIS but I don't have much a desire to shoot more than 3 calibers from an AR platform. Cool concept for anyone who wants to have it all in "one package."


Both Vltor and LMT advise NOT to preform repeated barrel changes.  The MGI is the only one that offers repeated barrel changes and does it without tools.


The manual I have from LMT doesn't say anything about limiting barrel changes with the MRP. Is this a new development?

Is this warning posted somehwere I can see it?

Link Posted: 11/4/2009 6:58:51 PM EDT
[#25]
Quoted:
my question is this.  Do the barrels shoot to  the same point of impact?  if not then you really only have one reliable removable barrell.


Iron sights are easy, keep the front sight mounted on the barrel, so when you swap barrels you are all set for elevation.
Optics are fairly simple too, I just sight in, mark the number of clicks on the elevation and windage from 0 on a piece of tape on the barrel.  Just swap barrels, readjust the sight based on the barrel label, and I'm back on.  Since I go back and forth from 5.56 to 7.62x39 to 458 SOCOM, this is how I keep the sight adjusted for each caliber change with only very minor adjustments.
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