Magi's Canonverse IS Suit: CR-IS1: Weyand Class battle
"Is this supposed to be an IS?"
"Well, technically it is an IS, but the tech is somewhat more "archaic", can't have one-off abilities but this is the best thing the defense budgetcan buy in terms of overpowered powered armor against women wearing only a bathing suit for protection. We are paying top dollar for this."
The CR-IS1: Weyand series is a mass produced battlesuit for combat by US soldiers named after. Designed to be used by the average soldier, this suit is deemed a "Anti-Land Attack Unit" The suit was developed as an attempt to use anything that could be of value from IS data and streamline it to serve it's own niche. The result is a unit that is absolutely terrifying in land skirmishes but terrible against airborne units. Including the Infinite Stratos series. A skilled pilot may be able to fend off against a 2nd Gen IS with a bit of luck and support from other suits, the standard procedure against 3rd gens is "GTHO"
The CR-IS1 Weyand comes with a Grenade Cannon (read a modified Paladin Cannon with special designed shells for penetrating IS shields.), a 10 round magazine Autocannon and a power claw. The unit is no slouch in movement, reaching a terrifying 300 mph when in full throttle. If an IS is caught on land against this unit, there can be trouble. The source of such tech is classified as it wasn't covered the Alaska treaty.
Because it isn't under the Alaska treaty, the US tries to mass produce this unit but so far only produced about 50 for combat operations and are reserved for emergency ops. Despite this, Magi uses this suit well enough to prove his worth to the world. Given the fact Crest is doing a bit of work on IS potential, it isn't far off one day in another lifetime an AC can be minaturized as well.