The Lahar-30L is a full-auto and magnum rated with no barrel length restrictions. It features a fully laser welded" hybrid construction made up of 17-4 stainless steel with and Inconel blast baffle. A wire EDM bore ensures perfect concentricity and consistency. Industry standard 1-3/8x24 TPI threads allow for the use of direct thread adaptors" the Aero Precision Mantle Quick Detach System and other common QD adapters using this thread pitch.