The IAG Sentry APC can be fitted with a 360° rotational turret mounted on top of the standard roof escape hatch. Upon request, a variety of gun mounts for heavy machine guns, rockets, or grenade launchers may be installed on the vehicle.

Based on Toyota Land Cruiser 70 series, a commercial vehicle platform, the layout of the IAG Sentry APC is conventional with the engine at the front, the driver and commander in the middle, and the personnel compartment at the rear. The Sentry is able to seat a total of eight military personnel including the driver and the commander. The ballistic-resistant windows provide the same level of protection as the armored hull, with each side of the crew compartment equipped with three small ballistic-resistant windows and gun ports. The rear part of the hull includes a single armored door, with ballistic glass, allowing quick and easy access for entry and exit from the rear of the vehicle. The custom-built ballistic steel doors are securely held in place with military style latching locks and supported by heavy-duty billeted steel door hinges. Each piece of ballistic glass is held within a ballistic steel frame to ensure it will not be dislodged in the event of a large blast. Lastly, all doors are backed with ballistic steel overlaps around the entire aperture of each opening. The Sentry APC has an emergency roof escape hatch. The Sentry’s "V-hull design" is made of high-strength, certified steel to protect occupants against blasts, IEDs, mines, and other explosives. The protective floor of the vehicle also increases the structural rigidity of the platform, preventing the chassis from twisting or bending during extreme off-road use. The Sentry APC can be armored from level CEN B4/B4+ (AK-47 protection) up to CEN B6 (7.62 x 51mm protection), NIJ level III, and STANAG I.