Takedown rifles?

[Virus]

So I've got to write a paper and suggest new designs. I'm not entirely sure where to go.

The design i'd like to recommend is something bassed off of the M-25 and configure into a bullpup rifle for an even more compact size. I haven't been told what the intended use is, so for now I'm assuming it's a DMR. I choose the M-14 platofrm because because it has better ballistics than a M-16, and a much faster ROF than a mauser at the expense of accuracy. The problem with using a bullpup configuration is the shorter sight raidus if it is to be used with iron sights.

Right now I'm reading into the designs the japs used in world war two and reading into how they have changed since then. Does anyone here have any takedown rifles of interest that are worth looking at?

Thanks,

Virus

[samguy700]

wtf?
explain what the hell your on about.
i dident understand your post but i got the title so i l disregard the post and stick with the title.

take down rifle for taking people down:
.22 call bullets except x2 longer so they have more range and acuracy.
cartriges filled with c4 so they pack more kick.
scope with nightvision and thermal
cant be arse to go on

[The Savage]

Do you mean like a semi-auto version of those H-S Take down bolt actions where you flip the lever and twist the forend a 1/4 turn ot w/e and it comes in two?

I don't think i've ever seem an assault rifle/DMR that does that, Also if it's a bullpup you'd probably only be able to take the barrel off, which, i dunno might save you 4 - 6 inches depending on how long the barrel is i guess.

[Virus]

wtf?
explain what the hell your on about.
i dident understand your post but i got the title so i l disregard the post and stick with the title.

take down rifle for taking people down:
.22 call bullets except x2 longer so they have more range and acuracy.
cartriges filled with c4 so they pack more kick.
scope with nightvision and thermal
cant be arse to go on

Well you're opening yourself up for a major attack here.

If you think you can load a cartridge with Composition 4 and have everything work, you're mistaken.

This is a takedown rifle:

http://en.wikipedia.org/wiki/Takedown_gun

[Virus]

Do you mean like a semi-auto version of those H-S Take down bolt actions where you flip the lever and twist the forend a 1/4 turn ot w/e and it comes in two?

I don't think i've ever seem an assault rifle/DMR that does that, Also if it's a bullpup you'd probably only be able to take the barrel off, which, i dunno might save you 4 - 6 inches depending on how long the barrel is i guess.

Yeah, thing is, I have to find a way to keep the scope zeroed.

If I could make the gas tube two pieces and still function, that would be heaven.

Oh something from my research everyone here might find interesting.

KGB Snipers used the Marlin lever-action takedown rifles over the Mauser or SVD simply due to the ability for the rifle to break down and fit into a briefcase.

[Vargus]

I choose the M-14 platofrm because because it has better ballistics than a M-16,

no u (http://www.rpgfirearms.com.au/SHOOTISTS/AR-10-2.jpg)

Atually, I'm also designing a weapon. The rough draft is a 12 gauge 2.5" shotgun which uses direct blowback. I'm researching simple ways of either adding some sort of delayed blowback or a gas operation using a bolt lockup concept like in the Degtyarev.

I think that in order to retain the zero you need to use the scout mount concept where the scope is mounted to the barrel instead of receiver. Obviously the scope and barrel are always mounted in the same orientation, so the zero should remain pretty close when you put the barrel back on the receiver.

[The Savage]

An action mounted scope should work, that H-S bolt action is basically a Rem 700 that comes apart at the action/barrel joint and there seems to be very little shift in zero (around 1/4 to 1/2 moa according to a review i read in a gun mag). However I imagin with a bullpup the action would be too far back to mount a scope on?

Edit:
Since you don't know what it's intended use is, is it possible that you could use a straight blowback action with a pistol round, or maybe a .30 carbine or something? It gets around the gas system issue and with a suppressor it would be a pretty cool little package.

[Virus]

An action mounted scope should work, that H-S bolt action is basically a Rem 700 that comes apart at the action/barrel joint and there seems to be very little shift in zero (around 1/4 to 1/2 moa according to a review i read in a gun mag). However I imagin with a bullpup the action would be too far back to mount a scope on?

Edit:
Since you don't know what it's intended use is, is it possible that you could use a straight blowback action with a pistol round, or maybe a .30 carbine or something? It gets around the gas system issue and with a suppressor it would be a pretty cool little package.

Yeah, I'm looking at the M89 SR and the AWC G2

http://world.guns.ru/sniper/sn66-e.htm

http://www.securityarms.com/20010315/galleryfiles/0400/443.htm

Yeah, but a DMR engagement ranges 1/2 moa at 600 yards is going to be roughly 3 inches. let's assume the design come out to exactly 1 MOA. that's roughly a six inch group. Let's assume something goes horribly wrong. You'd get a nine inch group (roughly) worst case. That's enough to miss the kill area or even completely miss. I also want to make it fire a standard NATO round as well. No one can complain that way.

Who knows, In the mean time, can anyone give me measurements on a M-14 and M-16 gas tube? I think that might screw the design. :(

[Stinger]

Yeah, thing is, I have to find a way to keep the scope zeroed.

If I could make the gas tube two pieces and still function, that would be heaven.

By gas tube I assume you're thinking of an AR15 gas impingment type system?

Anyway, the gas tube, gas piston (non-impingement) or op rod, whatever you want to call it, never exceeds the length of the barrel, so making it compactable would be unnecessary. Also, there's a stock that can convert an M-14/M1A into a bullpup already available: www.shortrifles.com

[Virus]

By gas tube I assume you're thinking of an AR15 gas impingment type system?

Anyway, the gas tube, gas piston (non-impingement) or op rod, whatever you want to call it, never exceeds the length of the barrel, so making it compactable would be unnecessary. Also, there's a stock that can convert an M-14/M1A into a bullpup already available: www.shortrifles.com

If you remove the barrel from the stock to save space when the weapon is cased, the gas tube is going to extend a bit further than the barrel unfortunately on an AR type platform I'm trying to keep this as compact as possible and be innovative.

http://www.midwaysuomi.com/schematics/PICS/Ar15.gif

Part number 60 is what I'm talking about.

Also seen here:

http://www.quarterbore.com/images/ar10ffrail_15.JPG

[LavaRed]

You could make it a single shot, rolling block action, or make it into a bolt action with a telescoping bolt system so that it could still be a bullpup. I'd mount the scope on the barrel, and make it integrally suppressed, to boot.
5.56 NATO, 7.62x39mm, or 7.62 NATO would all be suitable calibers, depending on your intended use and the AO you'll be using it in. I'm a fan of interchangeable calibers, so my rifle would be built to acommodate all three.