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Post by airbornerocks on Aug 19, 2009 19:59:18 GMT -5
Me and about 1000 other people
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Sgt_Tom
Technical Sgt.
Combat!
Posts: 3,580
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Post by Sgt_Tom on Aug 19, 2009 21:47:32 GMT -5
If you can fit a gearbox in the pot belly M1 Carbine stocks, which I highly doubt you can, I think someone would have done it already.
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Gabe
Private
I was audiemurphy but I'm now being original and calling myself my real name.
Posts: 80
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Post by Gabe on Sept 19, 2009 11:20:15 GMT -5
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Post by sarge12 on Feb 9, 2010 0:36:38 GMT -5
deacon was actually getting somewhere with a great project. then it all just died
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2nd Bat
Master sergeant
Posts: 11,813
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Post by 2nd Bat on Feb 15, 2010 22:51:39 GMT -5
Guys in case you hadn't noticed that is the norm for these projects. It's the last 10% of the effort that is tough. I haven't seen a functional, practical or reasonably authentic carbine yet. It is clearly a challenging undertaking. The rifle is way way smaller than one realizes until you think in terms of gear boxes and feed systems. Likewsie the FJ was way tinyer than I always thought. Some manufacturer will tackle a carbine AEG as a ground up production and I'll be the first in line.
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Post by sarge12 on Feb 15, 2010 23:05:26 GMT -5
The only kind of gearbox that you can cheaply use is the AEP, but that requires tons of work
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Post by cole97 on Jan 24, 2011 1:04:32 GMT -5
the TM MP7 gearbox fits perfectly into the carbine shape. i just measured. i would think this is how a professional company might pull this off if they decided to.
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2nd Bat
Master sergeant
Posts: 11,813
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Post by 2nd Bat on Jan 24, 2011 2:54:31 GMT -5
Go for it son we're anxious to see your results. With the Mp7 I assume you're thinking airborne version carbine not regular carbine? And the magazine feed system? Hmmmmmm? ?
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Post by cole97 on Jan 29, 2011 1:36:41 GMT -5
I couldn't do this to my beautiful carbine, sorry. I was just pointing out for others. If I could make a mold I would mold the receiver, and I could make a resin receiver. Obviously mine's a full stock, so yes, it could be a full stock. The hopup unit (whicever you would use, a Thompson hopup maybey?) fits in and could be used with a proper magazine. I'd like to stick with gas blow back for a while until it would be reasonable (Ie: why fix what works?) However, if anyone must know: The length from the very front of the magazine to the back of the receiver is 4.27 inches. The length of the back of the receiver to the end of the flat, bottom area of the pistol grip is 2.7 inches. The rough angle of the receiver and the grip (that would be how much of an angle the full stock grip is at) is ABOUT 162 degrees. The width of the reciever without the stock is 32.5mm. I hoped these measurments help people determine what gearboxes fit, and I'd like you guys to report back on that. I'd still like to clear up, I will (most likely) never attempt this build. I will be making my GBB m1 carbine look alright and work for ww2. I just want to contribute to anyone who wants an AEG. Oh, and one more thing. If you used an Mp7 gear box, the grip wouldnt be hollow. Maybey you could but a LiPo in the grip? Anyways, good luck to you guys!
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Post by troyluginbill on Feb 4, 2011 21:38:03 GMT -5
cole, I hate to burst your bubble but an Mp7 gearbox won't fit a carbine stock. It is too tall and too short. The problem with a carbine is the low profile of the bolt. From bottom of the stock (above the trigger) to the top of the bolt is just over 1.5 inches. The closest gearbox you can get for that is the uzi one and its can only be done as a full auto (and is still a little too tall.) If the side profile doesn't bother you then use an M14 box and go with the power. It will stick up above the stock about 1.25 inches but could be cleverly disguised to at least make it look like it belonged. It is the closest anyone can get to making a carbine AEG without either making an original gearbox or massively modifying a gearbox.
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Post by volkssturm on Feb 4, 2011 23:24:19 GMT -5
Thanks. I was contemplating buying an MP7. Guess I won't bother.
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2nd Bat
Master sergeant
Posts: 11,813
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Post by 2nd Bat on Feb 7, 2011 2:36:07 GMT -5
People for some reason like to talk out of the anus about things they are "confident" can be done when in fact they have no clue whatsoever. It is disturbing and chronic for reasons I will never understand.
The vst majority of self initiated custom projects never actually get finished as the builders confront numerous challenges they never considered and hadn't planned on or the endeavor provides obstacles that exceed their ability pocketbooks, patience or more often physical dimensions and technical challenges.
I am always thrilled to see completed projects and always skeptical about planned projects or builds in the early initiation phases. Ultimately it comes down to alignment, tolerances and feeding issues.
Custom guns are tougher by far than most people realize. The folks who think otherwise are mouth breathers.
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Post by freelancer on Feb 7, 2011 18:00:41 GMT -5
cole, I hate to burst your bubble but an Mp7 gearbox won't fit a carbine stock. It is too tall and too short. The problem with a carbine is the low profile of the bolt. From bottom of the stock (above the trigger) to the top of the bolt is just over 1.5 inches. The closest gearbox you can get for that is the uzi one and its can only be done as a full auto (and is still a little too tall.) If the side profile doesn't bother you then use an M14 box and go with the power. It will stick up above the stock about 1.25 inches but could be cleverly disguised to at least make it look like it belonged. It is the closest anyone can get to making a carbine AEG without either making an original gearbox or massively modifying a gearbox. the mp7 gearbox is the same as the scorpion as far as I know and here is a link to an M1 carbine build using a scorpion gearbox www.ww2airsoft.org.uk/php/phpBB2/viewtopic.php?f=13&t=9055&hilit=M1+carbine
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2nd Bat
Master sergeant
Posts: 11,813
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Post by 2nd Bat on Feb 7, 2011 22:45:23 GMT -5
You will note that the builder was well into the build when he posted his first entry on the project (Sept 2009) and the most recent post indicates that's it's almost done....needs a few more little items....should be fully ready in.... All this with a full on machining lathe. Looks wonderfully done and is very encouraging but honestly who on here can model what he has done?
I wonder what he ended up selling it for? Obviously no matter what price it brings not much of a return on the time and effort.
Freelancer....What is the alignment of the magazine with an MP7 verses a scorpion? Or is that something you just hadn't considered?
Great thread that should clarify for many just how hard these things are. This one is the best I've seen so far for an AEG carbine
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Post by CharleyNovember on Feb 7, 2011 22:53:04 GMT -5
I have both the M1 carbine and an MP7 gearbox. It looks possible from first glance if you have a mill and some time. I have one but not the other....lol A block of delrin would probably be easier to machine and work almost as well to use. I plan on making a resin mold for the top of the reciever..I still figure it will be a huge pain in the ass....If I ever get to it I will post something when there is something to see otherwise I will just keep it to myself for the most part. That's just me though.
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Post by freelancer on Feb 8, 2011 10:23:12 GMT -5
Freelancer....What is the alignment of the magazine with an MP7 verses a scorpion? Or is that something you just hadn't considered? I have both a scorpion and an mp7 sitting here in front of me. the gearbox in the mp7 sits at the very back of the body where on the scorpion it sits further forward. I havent taken the MP7 apart but the scorpion is a parts gun I got in a trade for a possible project or a spare gb for the MP7
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Post by troyluginbill on Feb 9, 2011 1:28:41 GMT -5
Look at the very first pic where he has the gear box mounted in the stock. It is too high by .25 inch. That being said, if you don't mind a high bolt you can accomplish this. It would actually be easier with an m14 gear box, as all the mag feed nozzles line up with the carbine. Painted black and with a sight on the back it will look very close. Close enough that at distance you could not tell. It simply depends on how accurate the gun has to be. You will have to make the stock yourself to insure that neck is thick enough for the motor. If you make the stock yourself you could even "fudge" the dimensions to make it look more proportionate. Again, it simply depends on how close you want the gun to be to the original.
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2nd Bat
Master sergeant
Posts: 11,813
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Post by 2nd Bat on Feb 9, 2011 11:34:55 GMT -5
TLB,
You were fairly far along on and doing as nice a job as I had seen on just such a project as I recall but like so many of these projects ran into issues for consistent feeding right at the end. How did that in the end come out?
The folks who casually suggest these things could easily be done are just clueless and frankly very tiresome. They are also the very same ones who whine if things are even moderately expensive. It gets really really old.
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Post by freelancer on Feb 9, 2011 17:13:41 GMT -5
TLB, The folks who casually suggest these things could easily be done are just clueless and frankly very tiresome. They are also the very same ones who whine if things are even moderately expensive. It gets really really old. That is very true. I have put countless hours in my Thompson builds and they don't even require any realignment or changes that could cause feeding issues. I do have a few things planned to build that will have those issues to get over to finish.
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2nd Bat
Master sergeant
Posts: 11,813
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Post by 2nd Bat on Feb 9, 2011 17:36:38 GMT -5
A whole diferent kettle of fish. Whenever possible the less you have to do to alter alignments (especially relative to feed systems the better) That's where 90% of the projects end and the reason most are never finished and are relegated to wall hangers.
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Post by troyluginbill on Feb 9, 2011 22:25:25 GMT -5
Mine ended up having an internal mag, the battery in the magazine and fired full auto only. I just didnt like it, so I took it apart. The uzi motor will be used in a reising I will do, probably next year.
Then I got started on the gun truck and really haven't revisited it. I think I will just go with funky proportions and an m14 gear box when I try again. I will also use a ruger 10/22 stock. I have two from other projects so I can screw one up and still not be out anything.
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