I read where one SEAL team shot more ammo than the entire U.S. Marine Corps, still, I am partial to my Force Recon(now MARSOC) Marines. :P
Also, SEALs can use the H&K USP in .45 ACP. This pistol is called the Mk 23 Mod 0 and comes with a quick attach-detach suppressor. It is, however, larger and heavier than the Sigs.