For the most part the US Navy and Air Force use all of the same small arms as the other branches of service. As far as unusual or unique weapons for the Navy:
M14: unmodified, still using wooden stocks. These are most often used as line-throwing guns during at-sea replenishment.
Mk-18 Close Quarters Battle Receiver: an upper receiver with an even shorter barrel (10.3 inches) attached to the M4. It was developed by NSWC Crane for special operations forces, but is seen in the hands of Navy VBSS teams; these used to be manned by trained personnel from each ship, but the Navy is starting to move toward having full-time VBSS teams attached to ships from the Navy Expeditionary Combat Command.
Mk-43: a modified version of the M60E3 for use as the SEAL squad LMG. Now being replaced by the Mk-48 LMG, kind of a hybrid of the SAW and M240, which has been adopted by other USSOCOM units (making it not exclusive to the Navy).
P226N: sources vary on the US Navy "Mk" designation, but this was adopted as the 9mm sidearm for the SEALs.
Mk-13: a bolt-action sniper rifle in .300 Winchester Magnum for the SEAL teams. This has been reported as either being the Accuracy International AWM, or a "home-grown" rifle assembled from various commercial-off-the-shelf components.
Mk-15: the McMillan Tac-50 bolt-action, detachable box magazine fed .50 caliber sniper rifle made famous by the 3PPCLI sniper team in Afghanistan. It is in use by Navy EOD units and the SEALs.
The USAF doesn't have any really unique small arms or vehicles (aside from its aircraft), except the M1116 variant of the up-armored HMMWV for their EOD and Security Forces units. The M1114 uses the "clamshell" of the regular HMMWV weapons carriers, but the M1116 has a box=shaped cargo shell that makes it resemble a large, armored station wagon.
Teek wrote:you watched BHD I see. The US army was testing the MP5 for Pilots in 1990s, now they have M4a1.
Partially correct; they use the M4. M4A1 fires unrestricted full auto, which is not issued to conventional units.
