The PWS MK107 (Diablo) Upper was developed specifically for CQB requirements and as a replacement option for the MP5 style weapons. The short compact design retains lethal capability out to 200 meters and has been proven highly effective in the military and law enforcement community.

Designed from the ground up to be 7 barreled Upper, the PWS MK107 (Diablo) is a dream come true for those looking for the shortest possible package with reliability of a full size Upper. The operating system, designed after the venerable AK-47, features a long stroke fixed operating rod design with an adjustable gas block, 7 handguard and free-floated barrel.

The handguard features the VLTOR KeyMod System which comes standard with two 2 sections of 1913 rail as well as a continuous 1913 top rail.

Understanding the importance of an ultra-reliable package that is light as possible, mil-spec forgings are used for the upper and lower receiver. Additional features include the BCM GUNFIGHTER charging handle.