Brother John.....did you mean the 105mm howitzer and your fingers type 155?
OOPS! As usual....Brother John is spot on the money!
The A1 model of the gun weighs 8980 pounds.
It can carry 11 troops with equipment, lift 2,600 lb (1,170 kg) of cargo internally or 9,000 lb (4,050 kg) of cargo (for UH-60L/M) externally by sling.[
One unit price for the L model was quoted as being 5.9 Million USD for the Army version.
the up engined blackhawks can lift the M777, however this will not form part of the operational doctrine for the weapon. It would be a combat emergency situation which would result in this being done. The prototype M777 weapons (known back then as Ultralight Feild Howitzer UFH) weighed 8500lbs a this point the Blackhawk was considered as a prime helo lift asset, howevetr the development of the weapon has increased the weight up to 9300 lbs for the basic weapon, and 9800lbs for the M777A1. The A1 weapon having the digital fire control system. The marines will use the CH53 for ship to shore operation and the army will use the CH47 as the prime helo asset to move the hozitzers. The MV22 Osprey is actually the driving force behind the weight requirememt, 9800lbs being the maximum the osprey can carry the proscribed distance to meet Marine Corp doctrine. I am not at liberty to say how far this is for obvious reasons.
In July 2004, the M777 successfully completed a series of airlift tests with the US Marine Corps MV-22 Osprey tiltrotor aircraft. The M777 was carried as an external load for a distance of 69nm.