IS CRANE SPEC FOR YOU? 

Not sure what you need? Let’s give a little clarification.

Basically, if you plan to run suppressed on a 10.3 inch 5.56 NATO barrel all the time or even a majority of the time, a Crane Spec (.070 gas port) may be for you. An Andro Corp Crane Spec barrel has a smaller gas port than our standard 10.3 Inch 5.56 NATO barrel (.078).

Adding a suppressor creates more back pressure. By running a standard .078 gas port, you increase the total amount of gas that will be blown back into the firearm. The gas will exit the firearm through the ejection port and many crevices of the receiver and ultimately into the shooters face. 

Running a Cranes Spec .070 barrel will reduce the overall amount of gas entering back into the gun and give the shooter a better experience.

This barrel is designed to be ran in conjunction with a suppressor. If ran without a suppressor, cyclability is not guaranteed. 

 If you have any questions regarding Crane Spec, Email us at [email protected]

TEST REPORT FOR M4A1/RIS II URG 10.3/M855A1 PERFORMANCE AND ENDURANCE TEST

Crane Division
Naval Surface Warfare Center
Crane, Indiana
47522-5001

CLICK BELOW FOR THE 2015 FULL REVIEW AND REPORT