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The Shock Absorber Man-Portable Active Protection System is a "soft-kill" active protection system developed by General Dynamics Ordnance and Tactical Systems and Israel Military Industries. The countermeasure detects and jams incoming missiles by confusing the missiles with a laser-based infrared directional jammer, causing them veer off from their target.
The Shock Absorber is depicted in Battlefield 4 as the MP-APS (Man-Portable Active Protection System), where it is depicted as a "hard-kill" active protection system that intercepts incoming projectiles by detonating them before they can hit their targets.
— Battlelog description
It functions similarly to the Active Protection specialization for vehicles, neutralizing any anti-vehicle weaponry or launched grenades for up to five seconds at a time. When first deployed or set back down after carrying, the system takes three seconds to initialize. Protection is automatically activated by the presence of an incoming projectile. After each protection cycle, it requires ten seconds to re-arm.
Unlike the vehicle based system, the MP-APS only protects a single 180° sector, in the direction the deploying soldier was facing. Three status lights on top indicate the protected zone and the system's status:
- Solid green - ready
- Pulsing green - protection active
- Flashing red - offline
An audible alarm sounds when the system is offline. The owner can also patch into the gadget's camera and orient the system in another direction, through use of a remote control with video feed.
The MP-APS adds an icon to the minimap showing which way it is facing, indicated by a shielded zone with a small heading triangle. (The icon does not precisely correspond with the protected area.) When offline, this icon also flashes. A highly effective tactic is to stand near an ammo box, as the MP-APS resupplies extremley fast, gaining a new one about every 2 seconds. This will allow the user to keep deploying them neigh-indefinitely, stopping almost any explosive threats quickly. This can lock down a small radius or allow the user to make a quick escape to a safer area, if needed.
A specialization, the MP-APS UPGRADE, increases the uptime of the gadget, allowing it to neutralize launched explosives for a much longer time before re-arming.