Who really likes guns, does not like just to own or shoot, also likes to know every one of the weapons, their operation, creator, and employment history. I found a very illustrative video on the operation of an AK47, he shows how the gas pushes the êmbulo and prepare a new weapon for firing, including details such as the locking bolt, spring recovery, ejection and reloading.

Since its inception in the 60s, a Heckler & Koch MP-5 has been considered a weapon sophisticated enough to meet the most stringent requirements of best elite military units such as the British SAS for example. Using the same principle of operation of the G41 and G3 rifles, characterized by good quality of handling and for having parts that are interchangeable with those of a large number of assault weapons heavier. The MP-5 has three ways of shooting: semi-automatic and automatic bursts of three shots, all controlled by the engine near the trigger, which also acts as a safety lock. These weapons are a major attraction in developing countries, not only for its reliability and maintainability, but also for its ease of manufacture. The breech box, built from sheet metal stamping, is fixed to the splined polygonal pipe with a bolt welded to it and swivel attached to the barrel. The trigger guard, the butt and the front are made of high impact plastic. H&K uses of metal stampings and sub-welded parts. The MP-5 has an impressive list of accessories, including device to fill the boot, a conversion kit for .22 caliber, a device to practice target shooting, a grenade launcher and several optical devices. Can be configured as MP-5 A2 with fixed butt or MP-5 A3 featuring retractable butt.

The MP-5K was introduced in 1976 and designed for special operations: the barrel is shorter, a vertical grip is added in front and no grip, just slide the lid of the box. The MP-5SD is a weapon with a silencer and identical to the MP-5 A2/A3, with respect to the operation principle and system of breech. The MP-5SD1 version comes with the box cover slide, the SD2 and SD3 has butt sets have a retractable butt. Ideal for special forces, the MP-5SD used in close combat produces low noise level, which added to the flame decreased in the mouth make it difficult locating the perpetrators of the shooting, may still be attached a laser sight, which greatly increases the their effectiveness. It is used by several police officers and elite troops around the world and manufactured under license in Greece, Pakistan and Mexico.

Origin: Germany
Length: 0.68 m
Weight: 3.1 kg (loaded)
Caliber: 9 mm
Rate of fire: 800 shots/minute
Initial velocity: 400 m/s
Charger: Type box of 10, 15 or 30 rounds