TLDR, big lightly armored amphibious marine transport armed with a .50 M2 and a Mk.19 grenade launcher
In the 1960s, the US Marine Corps became interested in developing a replacement for their LVTP-5 armored transports and selected a prototype known as LVTPX12 built by FMC. Testing concluded in 1970 and resulted in an order for 942 of the newly designated LVTP-7 (to be renamed to AAVP-7 later).
In 1982, FMC was contracted to design a service life extension program for the AAVP-7 which would upgrade the engine from GM 8V53T to the Cummins VT400 diesel, developing 525hp. It would also see the addition of an exhaust smoke system as well as a set of smoke dischargers and a night vision device on the turret.
In 1987, the AAVP-7A1 was further improved with the addition an "up gunned weapon station (UGWS) which was armed with both the M2HB and the Mk.19 40mm grenade launcher.
Since 1991, AAVP-7A1’s have also been fitted with the EAAK (enhanced applique armor kit) which protects the vehicle from up to 14.5mm machine guns and 155mm artillery splinters (STANAG 4569 lvl 4)
Below you can see an example of the vehicle with (left) and without (right) the applique armor
The vehicle weighs 21,800 kg and is equipped with a 525hp engine, providing a maximum on road speed of 72km/h and a maximum water speed of 13.2 km/h
The hull of the vehicle is 8.16m long, 3.27m wide, 3.32m tall, and armored with up to 45mm of steel, being able to resist 14.5mm AP along its frontal arc.
The M2 .50 machine gun is the same as featured on countless vehicles already in game, and is equipped with a basic load of 1200 rounds in the AAVP-7.
The Mk.19 is not in game but is very similar to the M75 grenade launcher found on the american Huey’s, firing the same cartridge but at a lower rpm (60 rpm for the Mk.19). The cartridge has a flat pen of 51mm at all ranges, contains 60.8g of TNT equivalent, and has a muzzle velocity of 244 m/s.
The vehicle holds a crew of 3 of a driver, gunner, and vehicle commander and up to 21 dismounts. The turret is capable of -8 degrees of gun depression and 360 degrees of traverse.
I think this would be an interesting vehicle at somewhere between 2.0 and 3.0. It isnt very well armored at all and doesnt feature all that much firepower but the mk.19 and .50 would be more than capable of getting kills at that BR if you use the vehicles higher than average P/W ratio and the relatively unique feature of multiple smoke options that arent commonly found at that BR. This vehicle could also go to both Japan and Italy who both received the up gunned version of the AAVP-7A1 in and 1999 respectively, although the Japanese dont seem to have opted for the extra armor kit.
FM 3-22.27 (field manual for Mk.19 grenade launcher)
Bradley: A History of American Fighting and Support Vehicles (Hunnicutt)