MP5

The MP5 is a submachine gun produced by German arms manufacturer Heckler & Koch. It was first developed in 1964, and has since been adopted by many police and military agencies worldwide. It has many different variants, ranging from the MP5SD with an integral sound suppressor to the MP5K with no stock and a shortened barrel. In addition, several versions are equipped with a compact, detachable forward handgrip which further augments the gun's great accuracy.

Battlefield 2
The MP5 is the standard submachine gun of the USMC, US Navy SEALs and SAS Anti-Tank Kit. It fires at 900 rounds per minute from a 30-round magazine, but it has low damage and accuracy, and a fairly long reload.

Battlefield 2: Modern Combat
The MP5-N is featured as the main weapon of the USMC's Special Ops Kit. It has decent accuracy, a high fire rate, and moderate damage.

Battlefield Play4Free
In Battlefield Play4Free, the MP5 is a buyable Elite weapon for the Engineer Kit. It features the longest range and most accuracy out of all of the submachine guns, as well as a 35-round magazine. However, it has more recoil than many of the other submachine guns, requiring it to be fired in short bursts at range. It also has a hefty cost, going up to 980 for unlimited use. As common practice with Elite weapons, the MP5 has a tan paint scheme on much of the upper receiver.

Battlefield 3
The MP5 has been confirmed to be in the Back to Karkand expansion along with 9 other weapons, It is confirmed here: http://bf3blog.com/2011/10/battlefield-3-back-to-karkand-weapons/.