In its final shotgun form, the K-441 holds four .410 shells loaded up with birdshot or slugs. The barrel indexing is done manually, but this device does have a safety, so it has that going for it ...

The UNISIG R-4-2-2 fully automated barrel cell is engineered and automated for continuous and synchronous production, capable of gun-drilling four barrels at once, while two gun-drilled barrels are ...