Thread: Mark your guns?

Originally Posted by canross

In the past I've thought of some other ideas such as chamber locks - an aluminium or alloy expanding chamber insert that expands when a key is turned. The insert would have recessed carbide teeth so if the insert was pulled or pushed out of the chamber without being unlocked it would bite into the chamber walls and resist being worked free to such a degree the chamber would be toast before it came out. The three big barriers are designing an insert that is fairly universal to fit most actions of a given caliber, make it easy to use, and make it well designed enough that it won't decide to stay locked one day and destroy your gun. A similar idea would be a bore lock that locks the length of the chamber with a coated high carbon steel bar down the bore (coated to avoid damaging the crown, bore or chamber). It could be length adjustable and work similarly to "The Club" steering wheel lock but in reverse. By nature any part of the locking mechanism would be protected by the barrel or receiver. You would have to cut the barrel in half to cut the locking bar, or try to drill it out, which could be dissuaded by using a hardened button in each end. Again, it would require severe damage to the gun before failing. Wouldn't bother a gang banger that wanted an Obrez style bolt action pistol or sawed off shotgun, but would be more of a pain than a basic trigger lock.

@canross

Yeah... that sounds quite easy. (-:

I looked at this idea as well, but came to a very different design. A steel cleaning rod (or and other strong material that wont cause corrosion on contact) Add a cap at the muzzle end to protect the muzzle and attach this (weld?) permanently to the end of the rod. Insert the rod through the muzzle until it passes through the action far enough to find a way to lock the rod so it cannot be removed.

It could also have a machined plug that matches the ejection ring from the calibre that it fires welded to the rod and locked at the muzzle end.

In the end we did not follow through with the design because if the thieving cnut cuts the barrel the lock is rendered useless anyway.

Maybe something telescoping in both directions, rear end extending back and fitting under charger bridge or equivalent, front end extending into chamber. Someone must surely have made something like that already.

Interesting - I wonder if you could build the telescoping design by incorporating a dial or wheel that drove two opposing tubes outwards or retracted them inwards depending on the direction of rotation. That wheel would have a keyed cylinder inside it to lock it in place once it expanded to a tight fit. I like that design... would work especially well in closed actions.

@canross

Don't know about a telescoping design, but if all you have to do is close an AR's ejection port and obstruct the bolt, a simple click in mechanism will do and only one extending lug is required. And why not also purpose made for a bolt action?

Tubular vending machine locks offer a more lightweight effective solution:

Attachment 87783

The locking lug may be shaped to engage with a Mauser style rifle's locking lug slot, all you'd need is some shape of the body of the lock so it would be unable to turn round.
It would be quite hard to get at, you could definitely not pick it with standard tubular lock picks, nor readily drill it out as most 90deg drills need a fair bit of space.
To prevent someone sticking a steel rod down the muzzle and hammer it out, you might provide a 30degree slanted front face to divert such a force sideways.

Would of course not be of use in rear locking bolt actions as there are no locking lug slots ahead by the chamber.

Of course a really good solution would be an inbuilt lock that immobilises the rifle's bolt in its forward, closed position. Also stops frustrated jokers from stealing your bolt and leaving the rest attached to the hot water cylinder.

That attachment did not work, here's to not giving up:



In addition to the idea of the AR15 port lock, you could devise a locking device for bolt action guns which simply is pressed down in front of the open bolt and engages the inside aspects of the magazine lips thus preventing its removal without a key. A device like that could potentially work with a range of bolt action rifles.

I've watched a lot of TV. Rifling is the ultimate ID isn't it? Just save a slug from your last kill and you have evidence connecting you to the rifle.

Originally Posted by YosemiteSam

I've watched a lot of TV. Rifling is the ultimate ID isn't it? Just save a slug from your last kill and you have evidence connecting you to the rifle.

True. But a fired case has even more info from both the chamber, breech face and striker.



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My Sako 75 Finnlight has the Sako factory bolt lock gizmo.
Means your bolt is heavy and oversized.

My 75 Laminate doesn't

Don't think the 85 continued the idea.