You can definitely mount the Stack-On GCB-900 (or the Stack-On Pistol/Ammo Steel Cabinet) to other Stack-On gun cabinets, but there are a few things you should consider.
Based on the manufacturer's product description, it comes with two removable shelves. That's pretty handy if you're thinking about stacking or mounting it with other cabinets since you can remove the shelves to fit larger items like ammo boxes or pistols.
Something to keep in mind, though, is that while the shelves are removable, you can't adjust them without making some modifications yourself. So, if you need different heights for the shelves, you'd likely have to drill some new holes. Of course, taking the shelves out altogether is no problem, giving you some customization for the interior setup.
When it comes to actually mounting it, you'll typically be using pre-drilled holes or some kind of fasteners to ensure everything stays put. The fixed shelf positions might mean you'll have to plan your storage a bit differently, but if you're comfortable with a bit of DIY drilling, you can make it work to suit your needs.
Apart from the shelf setup, the GCB-900 is known for its solid steel construction and black powder-coated finish, so it should keep your firearms and ammo secure. According to our research, people find it versatile and pretty reliable for expanding their firearm storage.
So, in short, yes, you can mount it with other Stack-On cabinets. Just be mindful about the shelf heights if you're planning on tweaking the interior organization. It's worth checking out your model's details and maybe even chatting with a pro if you're considering more extensive modifications or stacking setups.
