Prototype Side Slapper Mule Ear Pistol?

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I just acquired this Gary Karvonen .50cal Side Hammer Lock Pistol. The only info online that I have found is the patent documentation from 1983/84. I believe it's possible that this could be a prototype and the only copy that was ever made. Thoughts?

Wow, I'm a mule ear fan and what a prize that is!
The lock looks as solid as a Cadillac tank.
Can you post a link to the patent plans?

I wonder if it has a custom nipple?
It looks like it might.
 
It also looks like he moved the placement of the nipple since there's a plug in the original location.
Or is that a clean out screw of some sort?
Honestly not sure. Looks like a screw though. I'm afraid to take this apart. But it does need a good cleaning.

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Honestly not sure. Looks like a screw though. I'm afraid to take this apart. But it does need a good cleaning.

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Have you been able to determine whether there's a powder chamber of some sort at the bottom of the bore?
Or is the face of the breech plug simply flat at the bottom?
I've seen barrels built both ways, with and without a powder chamber.

If the screw doesn't connect to a powder chamber, then it's not a clean out screw.
A flat breech plug with the nipple in front of it can accumulate more residue that needs to be scraped out.

Thanks for the patent info.
It's interesting that he made the lock using a coil spring instead of a flat spring.
 
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I have been scouring the internet for a few weeks now and still can't find any additional info on this pistol. Curious what you think the value of this would be if I were to ever part with it.
 
I have been scouring the internet for a few weeks now and still can't find any additional info on this pistol. Curious what you think the value of this would be if I were to ever part with it.

That's a good question.
A wealthy collector or a firearms museum would pay more for it than a casual shooter.
And the gun definitely represents a considerable amount of time and financial investment in its building and design, especially if one were to include the cost of the patent filing.

However, it may not be the only prototype.
And some may consider the lock to be over-built, that is, it's a more complicated design than necessary.
And then there's the question of exactly how well does this particular lock function, which is an unknown since there isn't any performance history or reviews to rely on.

If the gun were included as part of a national live internet gun auction, the bidding range could vary greatly depending on the many types of characters who could be bidding on it.
I think that the potential winning auction bid price could be around $700 - $900.
If there were little collector interest then it could sell for less, and if there was more than one interested collector then it could possibly go for more.
If casual shooters were interested in trying to pick up a bargain, then they may not bid over $500 - $600 on it.
If a gun design engineer were enamored with it, then perhaps he would pay more.
It doesn't seem like it's a commercially viable design, but is more of a curio.
I'm not sure who it would appeal to that would be willing to pay $1000 - $1200 for it unless money wasn't much of an object to them.
 
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The reputable auctions can lower the net price just as easily as they can obtain a higher net price.
They can charge significant fees to both the buyer and the seller.
The seller can lose 15% - 20% in fees and the buyer can need to pay a similar premium on top of their winning bid.

Also, if an owner doesn't want to sell the gun for less than a reserve price, then if the gun doesn't sell for the reserve, the owner must pay the buyers premium that would have been collected by the auction house if the gun did sell for the reserve.
That makes putting a reserve selling price on the gun a risky option, which leads to a gun possibly selling at a lower price because people simply weren't interested in paying a lot for a used muzzle loader that they didn't have any real appreciation for.

When attending such auctions in person, they may have an inspection period before the bidding begins so that folks who attend the auction in person can see what they're bidding on.
That can also affect how much anyone interested would bid on it.

When there's a lot of guns available at a large, reputable multi-day auction, folks decide which guns they really want to go for, and which guns they aren't so sure about bidding on.
Some may only bid up to a certain minimal price and then quickly drop out.
It's like a dog race and a person can never predict what such a gun could end up selling for.
And with muzzle loaders, IMO it's often for less than top Dollar, and sometimes they sell for a bargain basement price.

Did you acquire it through an auction?
 
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That is a beautiful pistol and unique. The craftsmanship looks very good at least from this distance. Neat piece to own in a collection even if it shoots left :p

I would think the hammer impacting the nipple at the rear of the gun might not shift the point of impact as much as one would think, along with the overall weight of the pistol. It would have a much greater effect if the hammer were not as centered on the length of the pistol as it is.
 
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