Just speculation on my part. These two pistols may be possibilities?
Sig P220ST - It's all steel construction should prove more durable than the alloy version. Enhanced shootability do to it's increased weight. With the "k" trigger option it provides a consistent lighter trigger pull, while being hammer fired to provide for second strike capability. Improved corrosion resistance vs. alloy version. The P226 and P228 are already in Military use, including with elite units. It's equipped with a light rail. Should be easier to maintain and repair vs. their current hand-built 1911's.
HK USP F/S - Interestingly, HK is building a manufacturing facility in Columbus, Georgia. They are also building a new rifle for the Army said to be replacing the M16 and M4 carbine, called the XM8. The USP is a durable and lighter weight pistol for it's size. Offers a 12-rd. capacity. Comes equipped with a light rail. Corrosion resistent frame material with a pretty good finish on slide. The LEM trigger option provides a consistent lighter trigger pull, while still being hammer fired. The MK23 is already in use with an elite unit, the Navy Seals. Should prove easier to maintain and repair vs. their current hand-built 1911's.
Best, jnb01