My brother-in-law lives out in the sticks on a dairy ranch with the nearest neighbor being 2 miles away.
In the past 8 years he has had his gun collection stolen from his house.
The first time they kicked in the rear door, broke the glass from his gun case (just like yours) and took all of the rifles, but left the pistols.
Everyone figured it was the neighbors shithead drug addict youngest son who did it, and three years later his father caught him with the BIL's turkey gun.
Last time was about a year ago, the BIL went with a wall mounted gun case with heavy metal brackets mounted on the wall through the studs and doublers, and a long metal rod through the trigger guards.
They used his Sawzall to cut the lock off the rod and stole his SKS and Mossberg shotgun, but left the 4 custom hunting rifles and the engraved double-barreled shotgun.
They took his DVD collection (which was mostley kids stuff) and left the DVD recorder and stereo equipment.
Now he keeps the guns locked inside a walk-in safe.
The local sheriffs office found the SKS and the thiefs when they tried to pawn it.
Bunch of meth heads.