Here at Veriforce Tactical we pride our selves on Building and producing only quality AR 15 300 Blackout Upper Receivers. We use barrel blanks that are above industry standards and produce our own Billet stainless steel AR barrels to use with our 300 AAC blackout uppers. We try to build unique and custom 300 blackout AR uppers that not everyone has. Quality is a big deal for us. No one wants to have problems with they take a trip out to shoot. We use a special pistol gas system on our 16″ barrels to compensate for most of the different grain bullets that 300 aac blackout has. That’s why we warranty all of our AR 15 uppers for one year for personal use. We use nitrided barrels and stainless steel barrels with our custom muzzle devices. Check out all of our AR 15 300 aac blackout complete upper receivers for sale.