Esmet, Inc., manufacturers of Tufloc high security storage systems, offers a no-drill rack system for long guns. Tufloc vehicle racks are designed to hold most weapons in many positions (overhead, screen, roll bar, trunk, vertical between seats, floor, muzzle down, etc.).
The no-drill roll bar mount clamps to a roll bar with ordinary hand tools, with no hole drilling necessary. This speeds installation and is adjustable to fit virtually any roll bar configuration. Trigger guard security and delay timer with backup key is also available.