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5/19/2015 1:54:57 PM EDT
I realize that there probably aren't any real world applications for a masterkey, at least for a private citizen (not that that means we shouldn't be able to own one), and I'm not sure of the laws (nfa, sbs, mounting a shotgun to a rifle) or how one would go about it, (like maybe a serbu super shorty with a pic mount on top?),

but has anyone tried? I'm just curious to see if anybody has successfully done this. I know it's something the military MIGHT have a use for, and it's definitely tacticool, but it seems like it might be a fun future project, if not for the nfa debauchery...
5/19/2015 2:47:19 PM EDT
[#1]
tagged for interest, always thought one of these would be pretty cool
5/20/2015 6:26:38 AM EDT
[#2]
Lots of people have succesfully done it, but it's by no means popular, for reasons which will become obvious once you employ one. (Bad handling for both weapons, cumbersome to carry/transition, weight).
C-More Systems and the DOD solved the weight problem with the M26, which still isn't popular with troops for the other 2 reasons.
Delta got Masterkeys in the 80's (I think) but quickly switched to using a separate 870 breacher.
Either the M26 or Masterkey is a Short Barreled Shotgun when mounted. You can make a mount yourself and bolt it to a standard 870 receiver. That's what KAC did, as well as fellow member rncbinc in a recent DD Forum thread (where he also made his own M203 ). The front end requires some fabrication, unless you want it crazy long, or start with a MCS. The MCS includes an under-barrel mount, but it sits way too low in my opinion. Of course all of those are $200 NFA taxed items.
A few outfits have sold finished aluminum mounts and/or complete guns, but always discontinue sales due to low demand.
There was talk several years ago about C-More selling the M26 commercially, but I can only assume they concluded similarly.
I admit I would like to own either, or both. It would really only be useful if I went around breaching doors most of the day (especially by myself), but slap charges and mechanical tools would be superior (if not by myself, which would also be better).
It could also be a good less-lethal option for a smaller SWAT team, but I've never seen one employed as such. Someone help me convince my chief we should do it.
 
 
 
 
 


 
5/20/2015 4:05:45 PM EDT
[#3]
I tried two different shotguns and mounted them to a full size H-Bar. Both worked and shot well. Like stated above the configuration is heavy. I used a M 37 Ithaca with a B square mount on the receiver. I used a rail clamp to hold it rail to rail on the AR.I tried a second clamp at the end of the barrel witch I took off because it was not needed. Then I used a 870 with a mesa tactical 20" rail. It worked better since I could use more clamps. The M 37 weighted in at 18.8 lbs. The 870 at 20.2 lbs. Both shotguns are over 26.5" in length. The m37 has a 20" barrel ad the 870 has a 18.5 so as not to mess with the SBS stuff. Just took the stocks off and used the clamps.  Then took the clamps off and put the stocks back on. They are taken apart and all back to normal now.

It doubled the pics for some reason.

M37
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5/20/2015 4:25:40 PM EDT
[#4]
Quote History
Quoted:
Lots of people have succesfully done it, but it's by no means popular, for reasons which will become obvious once you employ one. (Bad handling for both weapons, cumbersome to carry/transition, weight).

C-More Systems and the DOD solved the weight problem with the M26, which still isn't popular with troops for the other 2 reasons.

Delta got Masterkeys in the 80's (I think) but quickly switched to using a separate 870 breacher.

Either the M26 or Masterkey is a Destructive Device when mounted. You can make a mount yourself and bolt it to a standard 870 receiver. That's what KAC did, as well as fellow member rncbinc in a recent DD Forum thread (where he also made his own M203 ). The front end requires some fabrication, unless you want it crazy long, or start with a MCS. The MCS includes an under-barrel mount, but it sits way too low in my opinion. Of course all of those are $200 NFA taxed items.

A few outfits have sold finished aluminum mounts and/or complete guns, but always discontinue sales due to low demand.

There was talk several years ago about C-More selling the M26 commercially, but I can only assume they concluded similarly.

I admit I would like to own either, or both. It would really only be useful if I went around breaching doors most of the day (especially by myself), but slap charges and mechanical tools would be superior (if not by myself, which would also be better).

It could also be a good less-lethal option for a smaller SWAT team, but I've never seen one employed as such. Someone help me convince my chief we should do it.
           
View Quote


Mounting the shotgun under a host rifle doesn't change the legal classification of either firearm. If you have an AOW shotgun or SBS, that classification remains the same when mounted in this manner. And it's never a Destructive Device, not sure where that comment comes from.

They are very cool looking, but do not really add a capability that offsets the added weight, especially when you are talking about merely 3-4 rounds of 12 gauge.
5/20/2015 9:44:24 PM EDT
[#5]
Real deal master keys are out there, met a member with on at a hometown shoot. It was for sale, prefer a 203 with a 12 gauge adapter, money is about the same.
5/21/2015 2:26:13 PM EDT
[#6]

Quote History
Quoted:
Mounting the shotgun under a host rifle doesn't change the legal classification of either firearm. If you have an AOW shotgun or SBS, that classification remains the same when mounted in this manner. And it's never a Destructive Device, not sure where that comment comes from.



They are very cool looking, but do not really add a capability that offsets the added weight, especially when you are talking about merely 3-4 rounds of 12 gauge.

View Quote View All Quotes
View All Quotes
Quote History
Quoted:



Quoted:

Lots of people have succesfully done it, but it's by no means popular, for reasons which will become obvious once you employ one. (Bad handling for both weapons, cumbersome to carry/transition, weight).



C-More Systems and the DOD solved the weight problem with the M26, which still isn't popular with troops for the other 2 reasons.



Delta got Masterkeys in the 80's (I think) but quickly switched to using a separate 870 breacher.



Either the M26 or Masterkey is a Destructive Device SBS when mounted. You can make a mount yourself and bolt it to a standard 870 receiver. That's what KAC did, as well as fellow member rncbinc in a recent DD Forum thread (where he also made his own M203 ). The front end requires some fabrication, unless you want it crazy long, or start with a MCS. The MCS includes an under-barrel mount, but it sits way too low in my opinion. Of course all of those are $200 NFA taxed items.



A few outfits have sold finished aluminum mounts and/or complete guns, but always discontinue sales due to low demand.



There was talk several years ago about C-More selling the M26 commercially, but I can only assume they concluded similarly.



I admit I would like to own either, or both. It would really only be useful if I went around breaching doors most of the day (especially by myself), but slap charges and mechanical tools would be superior (if not by myself, which would also be better).



It could also be a good less-lethal option for a smaller SWAT team, but I've never seen one employed as such. Someone help me convince my chief we should do it.

           




Mounting the shotgun under a host rifle doesn't change the legal classification of either firearm. If you have an AOW shotgun or SBS, that classification remains the same when mounted in this manner. And it's never a Destructive Device, not sure where that comment comes from.



They are very cool looking, but do not really add a capability that offsets the added weight, especially when you are talking about merely 3-4 rounds of 12 gauge.

You are right about everything. My erroneous comment came from a lack of sleep and coffee. I had read DD too many times looking for the SBS/DD thread in the DD forum.



I'd pay money for the M26 due to the ability to swap mag capacities. Unless they changed it from the early versions, they use Saiga mags.



 
5/22/2015 5:44:11 PM EDT
[#7]
Meh... underbarrel shotguns are soooo 1995.

The maritime threat is very, very real.



5/22/2015 5:53:40 PM EDT
[#8]


5/22/2015 6:52:07 PM EDT
[#9]
Or there's this, but manually operated:

5/23/2015 11:10:03 AM EDT
[#10]
Quote History
Quoted:
It could also be a good less-lethal option for a smaller SWAT team, but I've never seen one employed as such. Someone help me convince my chief we should do it.
           
View Quote


A less-lethal option mounted to a firearm? That would be a recipe for a lawsuit. Some officers can't remember which holster to draw a Taser from and you want someone to remember which trigger to pull?
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