Instructables
Picture of Ammunition Canister Lock Box
Create a inexpensive lock box out of an old surplus ammunition canister. Most ammunition canisters used by the military are made of thick steel with a lever closing mechanism. They are generally waterproof and have removable lids. This makes them ideal for storing a wide variety of equipment that are sensitive to moisture.
 
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Step 1: Selecting an ammo can

The best place to buy these is at your local military surplus store, or at a local flea market. They can cost anywhere from $5 to $50 depending on size and condition. When selecting an ammo can pay attention to the holes located in the closing lever. The one I used in this instructable happens to be shaped perfect for the hasp to pass through. If you can't find one like this in the size you want, you can always cut a bigger hole.

Make sure that the rubber seal is still located in the lid if you want it to be waterproof.

Step 2: Hardware

Picture of Hardware
You will need the following from your local hardware store.
- Hinge Hasp (sold for locking gates)
- Nuts and bolts. x 4(The bolts don't have to be very long, 10mm should be enough)

In my case the hasp came with four wood screws, but I needed something secure and decided to buy nuts and bolts.

Step 3: Mark and drill holes

Place the hasp on the front of the can and mark where to drill the holes. Make sure you try closing the lid with the hasp in place before drilling the holes to test the fit.

Make sure you drill the holes slightly larger than the bolts. I drilled mine the exact same size and ended up stripping the first bolt trying to thread it through.

Step 4: Attach hasp

Picture of Attach hasp
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Insert the bolts into the holes and attach the nuts. If you want to ensure that the ammo can will remain 100% water proof you can coat the nuts on the inside with silicone caulking.
Perfect. Exactly what I was looking for when I googled "ammo lock box kit". Thanks!
B2BSurvivor2 years ago
Nice setup and useful instructable. The whole waterproof issue is easily avoided by simply tack welding the hasp onto the can. Years back, we used a large 20MM ammo can this same way. We even tack welded a couple of brackets to it and matching brackets to our government issued Jeep. We had enough room in it for several issue .45 Colts and a couple of broken over M-16's. Locked it all up snug so we could tend to other matters from time to time when the weapons were not immediately needed.
646bph (author)  B2BSurvivor2 years ago
I'm in the army and that's where I saw this used the first time. We use it to lock up C7 (M16) bolt carrier groups, since they are not allowed to be transported in the same vehicle as the weapons on public roads.

Unfortunately I don't have a welder and as such couldn't weld them on, but for my use (indoor lockbox) it is sufficient.
JayTraceur4 years ago
Rubber Washers would surely create a waterproof seal around the bolts?
Yes it would, also applying a good dose of epoxy/J.B Weld to the contact point of the metals and nut, or even silicone gasket seal.
Or just epoxy the latch to the box, no drilling? You might have to do a little paint removal, but that's better than breaching the box.
Or you could just put a small glob of silicone on each of the holes befor you insert the bolts, and after it all is set up, you could put on a little more just to be safe.
646bph (author)  JayTraceur3 years ago
Yes, it should. I didn't need mine to be waterproof and not a lot of people need a waterproof lock-box. Normally you store valuables indoors anyway.
Wally_Z3 years ago
If you welded the ring to the box would that also help with waterproofing? Is welding the ring to the box possible? I've never welded before and don't know much about welding, so please help out a n00b.
IXSLR83 years ago
www.ammolock.com
rhendric3 years ago
If you want to be able to beat your lock box up a bit, a little Lock-tite on the threads and nuts would help to ensure that they stay in place and would help a little with water-proofing.
rnichols4 years ago
Tack weld the hasp onto the box.
IXSLR84 years ago
I found three products that lock ammo cans. The first one is an L bar and is junk. You can bend the bar and open the box in less than 30 seconds. I know because I bought one. The second one uses a pin and automotive washers to hold in on the box with an o-ring. Its works OK unless you don't put the washer on far enough. The thin washer got destroyed when I took it off to replace the seal. But the best locking one that I have found is the one at www.ammolock.com  It uses a thick pin with o-ring seal that can be replaced at a later date if it ever goes bad and it even comes with a quality lock too.
kurisu24 years ago
You actually don't need to modify the canister at all to place a lock on it. Simply lift the small handle like bar below the latch then lift the latch untill it makes contact with it. After that all you have to do is place a lock through the hole in the latch that is just the right size to fit.
SureShot4 years ago
Very nice! I just made one of these a few months back. I used one of the smaller ammo cans so I could mount it to the load rack on my bike.
Danfree5 years ago
Nice, but drilling holes defeats the waterproof capabilities of the ammo can with a good rubber seal.
Opposed to using bolts w/nuts, why not pop rivet it in place?
646bph (author) 5 years ago
I work with some policemen and asked them about the legality of using this as a pistol lockup here in Canada. They told me that as long as it is bolted to something solid in your house and the lock is of good quality, this is completely legal. The only requirement in Canada is that you store the ammunition in a separate lockup. While I don't really suggest storing your guns in this container, you can store your ammunition in this container instead of buying two separate lockups.
These can be bolted into your car for securing things against thieves or cops (but I repeat myself...). If used for the latter, a combination lock is better because they can take your keys and open the box, but they cannot make you tell them the combination, nor can they make you open it.
646bph (author)  Possum Living5 years ago
In that case, and in general, its probably a good idea to spray paint over the former ammunition description on the sides so that they don't become more suspicious.
i've been kicking this idea around in my head for a while.
what is up with your avatar
sl4sh3r5 years ago
I wonder if they make silicon O-rings that could slip over the bolts under the nuts to make it water resistant.
Cosantoir5 years ago
You can use a U-bolt for the hasp as well. Some ammo cans have a single round hole instead of the slots. If it's large enough for the hasp, it will work as long as you use a large enough lock. The ones with the small holes can be used if you make a hasp by drilling a hole in a short suitably-sized bolt.
...they make special locking thingys that you can buy.....
jdege5 years ago
I've done this with a number of ammo cans, but none of them had that convenient slot in the flap. I had to cut my own with a Dremel.
646bph (author)  jdege5 years ago
I've only seen the 5.56 mm in 30 round boxes with these slots. Even then some of those don't have the slots. The military often uses these boxes for exactly this purpose, so it might not be a coincidence.
Holden_vy_s5 years ago
Where do you buy these? Seems pretty bulky to ship overseas. I had an old .303 wooden box until termites ate it out.
You can buy them at camping and army disposable stores.