K-SPEC Enhanced AR15 Carrier- Down Vent, Sand Cuts, Hard Chrome

(3 reviews)
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Patent Pending

The K-SPEC BCG combines multiple key features focused on increasing the reliability of your AR15 style firearm no matter if you are running suppressed or unsuppressed, and regardless of conditions.  The K-SPEC is a truly plug and play BCG that will accommodate whatever configuration your mission requires.

Reduced Peak DB Report

When used in conjunction with a silencer, the gas redirect produces a quieter report

See testing results here- Down Vent vs Side Vent DB reduction testing

Downward Gas Vents

In an effort to reduce the amount of debris and gas vented towards the shooters face, the two standard gas relief ports have been relocated from the ejection port side of the K-SPEC carrier and placed underneath, in the magazine feed lip channels.  Two additional emergency relief ports have also been added to the bottom of the carrier to mitigate structural damage in the event of a case head separation.  Testing has shown that venting the gasses through the magazine well has no negative impact on the feeding or function of the magazine nor ammunition, and any added heat is negligible. 

Slotted Angled Carrier Rails

For enhanced functionality in adverse and rugged conditions such as sand, mud, dirt, and grime. These rail cuts are designed for debris disbursement, resulting in ultra-high functionality in the toughest conditions, including suppressor fouling and foreign contaminates. Strategically located angle cuts in the rails result in fouling and debris being moved into noncritical areas that are not in contact with the receiver and do not affect the function of the firearm. aka sandcutter

  • Designed to function reliably in the toughest conditions
  • Angled Carrier Rail Cuts for flawless function in adverse conditions and prolonged suppressed use
  • Full Auto Profile
  • Permatex added between Gas Key and Carrier Mating Surface
  • Carrier- 8620 steel, outside rails, bolt runs, and gas bores ground to .0002 tolerances, Hard Chrome finish
  • Gas key – 4130 steel, heat treated, secured with T25 torx fasteners, torqued to spec, staked with  hydraulic staking machine
  • 11.5 oz


Machined in house and assembled using only the finest steels and components. 

KAK Industry takes pride in producing some of the finest Mil-Spec/ Enhanced AR15 bolt carrier groups available, made 100% in house at our MO facility using Doosan machining centers, Tsugami Swiss turning, and the latest in FANUC robotics combined into an automated cell giving us lights out production capability.  In house automated CMM Inspection processes ensure consistent quality. 

Hard Chrome
K-SPEC Enhanced
Hand Preference:
Right Hand


  • 5
    KAK down vent carriers

    Posted by Ruben Falcon on June 3, 2024

    Any time I could keep a little gas out of my face, I love it. The gas venting into the magazine is no problem. Most of it is blowing onto the rounds your about to eject anyway.

  • 5
    Really like

    Posted by erron gunter on April 14, 2024

    Less port noise for sure! Negligible difference in mags or ammo being dirty. Gun was not gassy, but seems improved. Chrome coating and sand cuts are also great. Very happy with this carrier. Also no reliability issues at all!

  • 5
    Nice chrome!

    Posted by Corey on March 10, 2024

    Nice bolt carrier. No rough edges on anything and it's not super shiny. The downward vents didn't seem to get my mags any dirtier than a regular carrier so happy with it over all. I will more than likely replace other carriers with this.