Holes.
Gun ports
Unknown.
Magazines and the very few firearms that use clips are used to hold ammunition.
nerf magazine drum
On Sailing ships of old. The "Gun Deck" (Cannons) was the deck just below the top deck. The Cannons were faced out of the side of a ship through port holes called "Gun ports."
Gun shop, gun shows, e-gunparts.com
You will have to call to find out.
The "holes" are generally referred to as ports. They assist with recoil reduction.
Three Holes Two Brads and a Smoking Gun - 2014 was released on: USA: 2014
To attach a cable to a wall, you can use cable clips or hooks to secure the cable along the wall. First, determine the desired path for the cable and mark the locations where you want to attach it. Then, use a drill to create holes for the clips or hooks. Finally, insert the clips or hooks into the holes and secure the cable in place.
Paper clips in the holes
The best installation method for securing a frameless mirror using mirror clips is to measure and mark the placement of the clips on the wall, drill holes for the clips, attach the clips to the wall, and then gently place the mirror onto the clips. Make sure the clips are securely fastened to support the weight of the mirror.