Usually a Derringer, probably a pepperbox.
Holes.
You can get mirror with holes drilled on four corenrs. You can fix such mirror to your front door with help of screws.
The "holes" are generally referred to as ports. They assist with recoil reduction.
Gun ports
Three Holes Two Brads and a Smoking Gun - 2014 was released on: USA: 2014
I did this not long ago in my ranger. There are four hole in the front of the radio, you must remove the trim around it to see them. They are on the four corners. They make a tool that fits in the holes and pushes the clips in and the radio pulss free. I used four drill bits that just fit in the holes. luck.
In a 1999 Toyota Camry, the four drain holes for the sunroof are located in each corner of the sunroof frame. Specifically, they are positioned near the front left, front right, rear left, and rear right corners of the sunroof assembly. To access them, you may need to remove the headliner and inspect the sunroof’s drainage system, ensuring that the tubes leading from these holes are clear and free of debris.
Obviously- since guns have holes in them.
Then leave it alone. Nor does it need four holes
So their souls can escape their tormented, deeply rooted prison. Or some idiot shoots holes in it with a gun.
with there front legs
at each end of the front of the radio are two holes (4 in total) these holes may have grub screws with Allen key heads, these are just blanking screws and need to be removed, if they are not there or after you have removed them you are left with four holes, in these holes are sping clips that need to be pushed back, you can do this be using a special tool (two "U" shaped pieces of metal) or by finding four objects that will fit into the holes to retract the clips. all four holes need to be worked on at the same time. once the clips have been retracted the radio should then pull out. be aware that you will need a radio code to get it working again. robb