No, you can't hide behind that rock, it will still see you, and turn the rock into high velocity shrapnel.
Not quite. LOSAT works by driving a long-rod penetrator an hypervelocities, somewhere in the 5000-10,000 foot per second range. Accordingly. it's better suited to use against slow-moving or stationary targets- like your rock, expecially hollow ones like a tank, whose armor becomes that high velocity shrapnel when smashed away at Losat's circa 19,000,000 mile-an-hour impact speed. But behind light cover, or in a setting with civilian structures that offer cover, or against a fats, maneuverable target, LOSAT is not the choice, nor is it ideal for use against troops in the open. It may be that a better answer is a dual or multiple weapons platform that includes a single or twin LOSAT launcher, backed up by the availability of multiple tube dedicated tank killing LOSAT vehicles, after the fashion of the WWII Tank Destroyers. Even better, a platoon mix of about two LOSAT vehicles teamed with a pair of gun-howitzer vehicles, and an antitank/antiaircraft gun/missile combination, perhaps NOT LOSAT-derived would be an even better choice, so that a potential enemy who came up with a LOSAT-defeating countermeasure would still have good reasons not to pick on the vehicles with the big long *sewerpipes* on their roofs.
So far as a wheeled, non-amphibious version, it's real value would be its relative stealth and silence in operation, particularly at night, though Stryker's reported fuel consumption suggests that it'll have a heck of a heat signature problem to deal with. That means a more realistic role for the wheelies than as the 13-man *battle taxi* version so far advanced, and a whole lot more capable armament is going to be needed than a .50 machinegun system of dubious reliability.
But if I was one of those RPG gunners trying to sneak up on a troop transport, I'd be real concerned that it might not be the troop transport version, but a cousin like one of the following, particularly if they routinely accompanied the infantry transport versions. And that offers protection from attacks from both high-speed aircraft and helicopters, too, something a single .50 doesn't offer much defensive capability against.
