US Patent 10921081 Housing for a firearm with an exchangeable barrel

The present disclosed subject matter relates to a housing for a firearm with an exchangeable barrel, comprising a bushing into which the barrel root of the exchangeable barrel may be inserted in the axial direction. The bushing has a slot in the axial direction and a clamping device for bringing the slot from a starting position into a narrowed position. The bushing is configured to receive the barrel root in a press-fitting manner when the slot is in the starting position and has a spreading device for bringing the slot from the starting position into an expanded position.