[1] MGP stands for Marina de Guerra del Peru.

MGPs are simple blowback designs firing from an open bolt.

They are equipped with folding stocks which stabilize the weapon when firing at longer ranges.

The MGP-79 was the first MGP SMG developed from 1979 to 1985,[3] adopted by Peruvian security forces including police and military.

[5] In addition, the front end of the receiver has a threaded portion, which is used to mount a perforated barrel jacket to allow the operator to aim the weapon better.