Hi guys, thanks for tuning in to another
video on ForgottenWeapons.com. I’m Ian McCollum, and I’m here today at the Morphy Auction Company, up in Pennsylvania, taking a look at a nifty little .22 calibre … handmade machine pistol. This came out of Nicaragua, it is called the Osorio. And well, it was made by a guy who wanted a nifty little machine pistol, couldn’t find one to buy, couldn’t buy one. Don’t know exactly what the machine gun laws are in Nicaragua, but he went ahead and manufactured this. It was then purchased by a guy who brought it into the United States, and registered it as required per our National Firearms Act, and now it is legally here in the United States. It is … for being handmade, it’s a really clever little gun. There are a bunch of interesting design features in it. So. I really have no other history to tell you about it, so let’s dive right in and see how it works. Let’s start by taking a look at the markings. Calibre .22, Osorio, “Selectiva”, so selective-fire. Osorio as best I know doesn’t translate into anything in
particular, [Correction: Osorio was the maker’s name.] if it’s some sort of Nicaraguan slang I would
be curious to hear about it in the comments. And of course “Hecha En Nicaragua”, so made in Nicaragua,
and serial number zero. That’s the extent of the markings. The magazine here has a release button
in the right side of the grip, push that down. It’s a little bit tight in there,
but we can pull that out. Holds approximately 22 rounds of .22 calibre
ammunition, and it is marked “Made in Italy”. I am not sure exactly what model of
firearm this came out of, but obviously this was commercially manufactured.
You can see the spring in the front there. So the hardest part of making a .22 calibre machine
pistol, would of course be making the magazine. This was made with a kind of nifty little, like,
almost the vz.61 Skorpion style folding stock there. There’s a button at the back of the receiver. If I
push that in, I can fold this down and it locks up. Well, sort of locks. It sits right there
with a little cutout for the muzzle. Cool, handy. And I just push the button again to deploy it. There are
holes here and here, and those are actually used for a sling which got taken off because it
… kind of gets in the way for disassembly. But this does actually come with a little sling. Now we have a safety on this side. That’s fire and that’s safe.
There aren’t really any detents, this kind of just slides in between. I’m going to put that on the fire position because
you’ve also probably noticed this double trigger, as well as there is a grip safety in here. So you kind of need a high grip
to … activate the grip safety. And then in use, the top trigger bit is
for full-auto and that comes straight back. So you can see the motion of the trigger
there, it’s not pivoting, it’s coming straight back. Whereas the bottom trigger for semi-auto does pivot, I guess that’s not the clearest thing in the
world, but take my word for it for the moment. I’ll show you in a moment what that’s actually doing. Now disassembly begins by pushing
out this pin. It is captive, which is good. So that comes out, then this whole upper
assembly slides forward, and it is also captive. Once it slides forward out of the rear block
of the receiver here, that can then pitch up. Then what we want to do is take this pin out, like so. There is a clever element here. This pin locks the barrel in place. And it’s really important
that the barrel is effectively properly locked before you fire. So you’ll see that there’s a little cutout in the pin there.
That has to be facing downward when the pin’s in place because we have this little block left in the receiver. That block has to fit in this little slot, and if we
look in close, that’s where the barrel pin goes. And if I rotate the pin you can see I can
rotate it so that flat is out of alignment. If I do that this will sit down, but it cannot go back into position. So the gun
can’t be reassembled and can’t be fired. This pin has to be aligned like that so that this block can slide forward. Now the barrel’s properly locked in
place and the gun can be reassembled. But going back to our disassembly, we’re going to take
that pin out. We can then push the whole bolt and barrel assembly out the back of the upper bit. Bring this charging handle to the back and it lifts out. We then have… This is just your cocking lever. And its own little return spring
because it can slide in this whole area, so it needs a little return spring
to make sure that it stays forward. Then we have our bolt and barrel assembly. So when you fire the barrel here is locked
into the frame, and this telescoping bolt reciprocates backwards, like that. So that is going to pull a cartridge
out, chamber the next cartridge. Our sear locking surface is up here.
This does fire from an open bolt. I can disassemble this by bringing the barrel
down out the bottom. That’s fairly simple. It’s also fairly long, by the way,
because of this telescoping bolt design. Like I said, there are a lot of clever little elements in this. Because this fires from an open
bolt it’s able to have a fixed firing pin. That ridge will actually strike the … rim of
the .22 cartridge at both the top and the bottom, which makes it much less likely that you’ll have a dud
because you’re getting two strikes simultaneously. And then this is the sear surface. Looking inside the lower part of the gun
we have a unitised fire control assembly. This all comes out of the gun I’m sure, but I’m not exactly
sure how. I suspect you have to pull out the safety lever, but it doesn’t want to come out.
So I’m just gonna leave this alone, because I can show you what’s
going on without having to take it out. This is the sear that locks over this front section of the bolt, so the bolt’s actually going to be
in this configuration right there, the front section catches on this. Now when I pull the top trigger,
that’s the full-auto setting and (if we can get the grip safety depressed
and do this … Oh, safety, there we go), so if I pull the top trigger the whole block here lowers, like so. That brings it out of contact with the sear, and
the bolt will cycle until it either runs out of ammo or I release the trigger. It comes up, and
then the bolt runs into the front here and stops. Now when I pull the semi-auto trigger
instead, this whole assembly pivots like this. Now if I don’t have the trigger pulled,
this little bar is underneath this hook and prevents it from going down. However what happens in semi-auto is that we are un-blocking the trigger, which allows this to go down, and if I put pressure on this
simulating the bolt it does go down. However, we’re not lowering this whole block, so the bolt’s
going to come back over this, and then it’s going to pop back up, and the bolt’s gonna catch behind it. Compare that to the
full-auto version where this whole assembly drops down so the bolt doesn’t catch and continues to cycle. That is the difference between the pivoting
semi-auto trigger, and the sliding full-auto trigger. Looking at the rest of the features here.
We have this block which I already told you about. It’s a safety block for reassembly. This is the ejector, when the bolt … gets back to here,
this hits the rim of the cartridge and kicks it out of the gun. We have a grip safety here which presses
forward and allows the trigger to actually function. And that is pretty much it. If we close that up, and take a look at the sights here, they’re pretty basic. They are adjustable for both windage and
elevation using these … knobs on the back. So that is the Osorio. I can
demonstrate the firing mechanism here (by the way this is a non-reciprocating charging
handle, that’s why it’s got its own little spring), if I fire this in semi-auto (hold onto
the bolt just so I don’t slam it), it will fire, and then I’m holding down the trigger, but it
locks back open. If I switch to the full-auto setting the bolt will cycle until I release
the trigger. Then it’ll lock back open. … Hand made gun, this thing exhibits quite
a lot of really cool, clever design elements. It seems to be very nicely made, clearly one
off, clearly, you know, small shop production. But whoever did this, did a quite nice job of it.
Really my biggest complaint is just the fairly sharp edges and points on this
stock, sort of quasi-stock, assembly. Other than that the thing’s really quite decent. Well, I hope you guys enjoyed the video.
If you’re interested in this sort of thing, the Morphy Auction catalogue has all sorts of other interesting
machine guns in it, so definitely check them out. And thanks for watching.