SKB
Mil-standard waterproof AR case rated IP67 submersible and built to MIL-STD-810H, with a custom-cut foam interior that fits rifles up to 35 inches overall.
SKB's iSeries cases carry the most explicit mil-standard paperwork in the field. The 3614-6 AR Case is gasket-sealed and submersible to an IP67 rating, and SKB lists a water and dust tight MIL-STD-810H build that resists corrosion and impact damage. For a buyer who cares about documented testing rather than marketing claims, that spec sheet is the selling point.
The custom-cut, high-density closed-cell foam interior has an AR cavity sized to accommodate rifles up to 35 inches overall, so it fits an AR-15 with optic mounted but not a full-length bolt gun; SKB's longer iSeries cases cover those. Adjustable pull-out foam plugs let you tune the rifle and scope pockets, trigger-release latches resist accidental opening, and SKB backs the case with its lifetime warranty. At $360 it costs more than a Pelican Vault but undercuts the AR-specific Nanuk, and it is the pick when standards conformance is the deciding factor.
Add the SKB iSeries 3i-3614-6 AR Case to your build and see how it enhances your platform.