About real PWS Diablo:
The Diablo Upper is Primary Weapons Systemsï¾’ answer to the 7ï¾” AR-15/M-16 series upper. Rather than simply bolting on an existing product and calling it revolutionary, PWS stepped back and designed a system from the ground up to work specifically with the extreme pressures of the 7ï¾” barrels.

We started with the barrel and after careful research decided on a 7ï¾” (not 7.5ï¾”) stainless steel polygonal bore barrel with a 1:8 twist. A match bolt carrier assembly is housed inside of a MUR-1 (mil-spec) upper receiver with a billet machined charging handle. Low profile quad rails give the most possible room for accessories and XTM rail covers.

The Diablo upper utilizes a long stroke piston system for additional dwell time and smooth recoil. The system is rounded out with the new CQB comp from PWS - a comp designed for short barrels that compensates, suppresses flash and directs all the blast forward.

Madbull 7.0 inch PWS Diablo (Dark Earth)

The MadBull Airsoft version kits: (Note: Thsi is Airsoft version which is made of lower grade materials and different dimension, Do not apply to real firearms.)
Flat Dark Earthcolor is SOCOM approved color used in US Special Force
"Limited quantity!"

Including Handguard set, Outter barrel, Barrel nut, Compensator, and Non-functional piston decoration