For the Groza, I'm obviously going to build several models. Heck, I may even make a kit! I'm going to start with an AK-74 as the base rifle, and custom mill the bullpup parts.
The basic bullpup conversion will require some additional parts - a second trigger guard is necessary for the magazine release lever.
If you use a Saiga .223 as the base rifle, you will not need a 2nd trigger guard. That leads me to my next idea - a Saiga .223 conversion into the bullpup config. The advantage here is that since the standard AK-74 FSB is not required on the bullpup, you'll have one less extra part to worry about. And all of the "custom" parts on the Saiga means you won't be butchering a perfectly good AK-74 parts kit to get your custom bullpup.
For a 9mm conversion, you could use the PPSH 9mm barrels from K-Var, a barrel blank from any of the gunsmith stores like e-gunparts.com, etc. and put a barrel extension on it, or go with an SBR rifle.
The Norinco charging handle is actually removable. It drops (literally) into a hole in the top of the bolt carrier. Quite easy to duplicate if you need to. I should have taken more pictures of mine when I had it. I don't remember it flopping around at all, but I do remember that you needed to remove it in order to completely strip the rifle.
The Norinco charging handle is actually removable. It drops (literally) into a hole in the top of the bolt carrier. Quite easy to duplicate if you need to.
TEc
It looks to be a 7.62 saiga using an AMD65 handguard and an ultamak gas tube rail with an AR15 carry handle.
I would probaby fabricate a front sight that could screw to the front of the carry handle. I would use an AR-10 carry handle because its longer affording a slightly longer sight radius.
It looks like they recycled the siaga triggerguard.
I would like to find a forward folding grip that could be used much like the AUG. I think Bushmaster made a grip that clamps to a barrel that could also be modified and used on this build.
Thats the gas block that came on the siaga the guy used to build that gun. He did need to remove it to install the handguard retainer. Removing gas blocks on the saigas are a bitch.
I built a bullpup similar to Fargo's, except I used AK-74 parts and an AMD-65 metal handguard. Do a search on the AKnet for Shadowpup, and take a look at the pictures.
You will also see just how easy it is to built a bullpup using my simple idea. It had to be simple cause I am.
I installed a scope on my bullpup by using a side mount on the rear sight base. I have since removed the home-made 2 x 4 stock and replaced it with a small square wood piece that is the same size as the receiver. That is all I need as the 5.45 caliber has almost no kick.
Also, I used a front sight base, turned upside down, to mount a forward pistol grip on.
Concerning the linkage for the bullpup. Check out my pictures. You can see how the linkage I used on my Shadowpup works. It is very simple. I purchased the spring wire I used from Brownell's years ago. It came as a package of various diameters, straight (12" long), spring wires.
As stated, the holes I drilled in the triggers had already been countersunk for a different linkage. These countersunk holes made installing the spring wire in the triggers very easy. You can determine the distance apart for the bends in the spring wire by measuring the trigger pin holes, center to center. The picture shows a 3/8 inch "tail" pass the bend. The "tail" should only be about 1/8 inch long.
With the long "tail" the hammer kept catching it, and over a period of use, broke it off.
I think I will attemp to duplicate the Type 86 with improvments of course. I have a OOW reciever and East German AKM parts kit that I have been trying to find a use for. Any one have any pics of this thing dissasembled? I may try to start working on this thing after Xmas and will be sure to take pics for everyone's benefit!
Don't think of it in terms of AK operation. Let your mind flow freely, young Skywalker...
The bolt doesn't have to have all the mass behind the round. The bolt can have a major portion of it's mass surrounding the barrel (like the Uzi, Mac-10, and CZ-24/26). The bolt doesn't have to be as long as the AK. There doesn't have to be a rotating bolt. The locking lugs could be positioned anywhere in front of the magazine and chamber. It could use locking rollers like the H&K rifles use.
There doesn't have to be a hammer behind the round. The Thompson SMGs (except for the M1A1) had a levered striker that impacted the firing pin when the bolt traveled all the way forward. One end of the striker would impact the receiver and the other end would slam forward into the firing pin. With these bullpup designs, the hammer could push toward the rear of the rifle and operate the firing pin through a levered striker to fire the round. This could easily be accomplished with only about an inch of material behind the round.
The attached pic is highlighted with some guesses about layout and functionality of the design. The light gray would be the barrel. The dark gray would be the bolt. And the red square is the space between the back of the magazine and the receiver. Since we know how the mag will line up with the barrel, we can approximate the location and dimensions of the mag. Notice the gap behind the magazine. That red square is all the space needed for clearance of the magazine and receiver. The bolt would only operate across the distance of the magazine (about 2.5" stroke). This is all just a guess, but it is a logical way to maneuver components to minimize overall size of the weapon.
A bullpup like this could easily have a 16" barrel and still only have an overall length of about 20". Coincidentally, the P90 is about 20" long, but it only has a 10.5" barrel.
I really hope you're kidding. If not, it goes in the big rectangular hole on the bottom of the rifle under the ejection port. Look REAL close and you'll see how the rear trigger(?) is cut. It fits around the magazine just like a 1911 trigger.
I like how the rear sight is jacked all the way up on the 1000 meter mark to get it somewhat lined up with the front sight.
There must have been a design contest to see who could use the most bakelite and the most off-the-shelf AK parts possible to make a bullpup...
Of course, I wouldn't be unhappy to own any (preferably all) of these rifles...
The one with 3 barrels would be really interesting, especially on full auto!
Now this one shows some promise. It takes a bayo, and the front strap can be used as a grip. Looks like standard aftermarket clamp on AR15 sights could be used on a rail. A 5.56 Saiga would be a perfect donor for this project.
This one shows promise because it has a plywood stock that encompases the entire rifle.
Another interesting design. Unlimited possibilities.
Here they made a shell that encapulates the entire AKM receiver, then they moved the Pistol grip back further so one has a front handgaurd.
Not an AK but here is an interesting Mac-10 Bulpup conversion.
Not knowing anything about it, I think the mag release is the silver (unfinished) tab directly behind the magazine well opening. It appears by the linkage bar that the original trigger housing of this weapon was unmodified and the bullpup addition an afterthought. That's the only reason I can think that it was left open like that...
Don't know where these pics are coming from, but they are very interesting! Wheels are a'turnin'!
FWIW my visios of the Groza stuff are coming long nicely. I have determined with reasonable certainty that the Groza uses a "pusher" style op rod like with the Steyr AUG. That's going to be my design I think. Isn't really a big deal whether its a pusher or a puller, it is just repositioning the connection points.
I think also that the Groza, like that silver .223 design, uses an op rod that connects on both sides of the magazine, either reducing or eliminating binding by running it along only one side. It stands to reason further that this is a 2-section op rod, making it conducive to the Groza's "quick change" design. This is Purely analytical observation of the few photos available and deductive reasoning, so I may be totally off-base... then again I can't prove I'm NOT right.
The mill is finally rebuilt (yay) and I really want to get cracking on this now that I think I've worked out some of the fastening issues. I may use my unbuilt AK-74 kit as a donor for the first one. Would rather build the first one in 7.62 but we'll see what happens.
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