Notes: This jury-rigged vehicle is a local modification by Lebanese forces. It is an M-113A1 with a ZU-23-2 antiaircraft gun installed on the rear deck. The rear deck hatch is retained, as is the rear ramp, but the commander's hatch is blocked by the gun installation. The base vehicle is largely unchanged and can be easily converted back to the APC version, and with a limited ammunition load can still be used in that role. Ammunition in this vehicle is normally carried in cans or in the crates the ammunition is shipped in, but some have been modified with improvised racks. Elevation and traverse are manual and unable to keep up with fast aircraft; as such, the vehicle is normally used against helicopters or in a ground support role. There is a gun shield on the front of the weapon, but otherwise, the crew operating the gun is unprotected.