Question: which hmmwv variant has permanently installed armor protection?
Answer: -The M1151A1 has Integrated Armor Protection (IAP) and is armor ready, meaning it is designed to accept additional armor. -The unarmored M1151 has a crew and cargo weight capacity of about 4,000 lb. The armored A1 capacity is reduced to 3,900 lb with underbody armor, or to 1,800 lb if perimeter armor is also installed.