I picked up the Silver Bullet at Defcon from the Merch area, it looked deceptively simple from the example lock and demonstration. I just so happened to have a #3 padlock I had brought with me so I bought it.
I spent the next several days trying to figure out how in the hell to use the damned things. I read the directions a few hundred times, I looked online and all I saw was a lot of videos showing how easy it was and descriptions of "you just slide this one in, press down, then slide the other one in and press down".
I could not get it to work.
Furthermore there was nothing online that showed exactly how it worked, what it moved, and what the lock looks like inside.
So I decided to tear my lock apart and take a look for myself and see exactly what the hell I was supposed to be doing in there.
|It's a #3 it got a bit ground off|
|Peterson Silver Bullet Bypass w/ "custom" grips|
Here's the lock with the face and the unimportant plates removed.
This is the lock cylinder. Nothing fancy, just a 4 pin setup with no security pins. The back has a protrusion that when the sheer point is reached and the plug turned interacts with a post that moves the locking plates and releases the shackle.
This is the padlock without the plug. Finally I was able to see what was going on in there.
|Outlined in Yellow are the locking plates, Red is the post that rotates to move the plates and release the shackle|
This is what the locking plates look like
|You can see the scratches where I've been using the bypass on this one.|
So this is how the bypass actually works
This is with both A and B bypass tools in their proper position. Bypass B tool has to reach the second locking plate which is about 2 plates further down than the first locking plate. Once the A tool is inserted properly it moves the locking plate which also reduces the opening available to get the B tool into it's proper position.
Here's some more pictures of the locking mechanism and post.
|Post, there is a 3 stamped in the the middle|
|Side View, when turned the sides contact the locking plates and press them against the springs|
|Top, furthest from where key is inserted into the lock.|
|Lock with Top Plate removed, this is the locking plate that the B tool interacts with|
|Lock with Top Plates removed, this is the plate the A tool interacts with|
|Here are the 4 plates that make up the locking mechanism for the shackle|
So that's it. The mystery of how the Silver Bullet Bypass tool actually works is solved.