This series of the Gen 4 Infidel features a 13.7″ cold hammer forged barrel chrome lined barrel, Lo-Pro gas block, and KX3 pinned/welded flash hider. The upper receiver is is a precision machined billet receiver from 7075-T6 aluminum and has a hard coat type III anodizing with Cerakote ceramic coating. The lower receiver is also machined from 7075-T6 aluminum and features an ambidextrous bolt release, Norgon ambidextrous magazine release, and ambidextrous 60 degree STS safety selector. It has a ALG Defense ACT Trigger, Magpul SL stock, and Magpul MOE K2 grip.