Magpul

Magpul is an American company that is known worldwide for its development of weapon accessories and tactical designs and unique training courses for military and law enforcement personnel. The company was founded in 1999, primarily for the purpose of developing and manufacturing devices for quick reloading of weapons.
The name of the company Magpul also comes from an accessory, which was used in the U.S. Armed Forces and allowed to quickly remove the magazine from the pouch (magazine pull — a piece of parachute sling, which was wrapped in the form of a loop on the bottom of the magazine and fastened with scotch tape). 
Currently the company develops accessories for the US Army and NATO armed forces.

Magpul has been expanding its operations over time, and as a result, Magpul PTS and Magpul Dynamics were established as subsidiaries.
Magpul PTS continued to develop weapons, but it was no longer a firearm, but a strikeball weapon.  Also the company was engaged in equipment and accessories development. Strikeball weapons and elements of Magpul equipment were used in the shooting of the film "Transformers 3: Dark Side of the Moon".
The subsidary Magpul Dynamics has focused on producing of educational materials, they make educational videos on various topics, such as sniper rifle shooting and pump using.