"The latest big-bore variant of the world-famous HK416, the HK MR762-A4 Carbine Semi-Auto Rifle is the premium-grade commercial variant of its select-fire military cousin. The MR762-A4 Carbine utilizes HK's short-stroke gas-piston operating system that virtually eliminates malfunctions commonly found in direct-impingement gas systems and yields much cooler, cleaner, lower-maintenance operation. This is the same key feature critical to the success of the HK416 used by elite military and law enforcement personnel worldwide. The MR762-A4 Carbine functions reliably and accurately under the most extreme conditions with a wider range of 7.62 NATO and .308 Winchester ammo than any other commercial AR-platform rifle. And its adjustable gas regulator allows the operator to tune the action for suppressed and unsuppressed operation. This model enhances the performance by adding a 9-position collapsible stock and slimline M-LOK handguard. 16.5"" match-grade, cold hammer-forged barrel. Ambidextrous charging handle. Includes 1 magazine. HK short-stroke gas-piston operating system 16.5"" match-grade, cold hammer-forged barrel Lightweight, slimline M-LOK handguard Slim 9-position stock Ambidextrous charging handle Adjustable gas regulator for running suppressed and unsuppressed 2-stage trigger with 4.55.6 lb. pull"