Heckler and Koch MR762 A4 Features The Heckler and Koch MR762 A4 brings the battle-proven short stroke gas piston operating system of HK s professional-grade 7.62x51mm platform to a 16.5 threaded barrel configuration with a 1:11 twist rate and 5/8x24 thread pattern ready for suppressor use. The fully ambidextrous lower receiver and extended ambidextrous charging handle ensure smooth natural operation from either side without modification while the M-LOK handguard provides a lightweight rigid accessory mounting platform for lights lasers and foregrips. The collapsible and folding HK416 Slimline stock adjusts the overall length from 35.5 to 39.5 for a comfortable adaptable shooting position in any field condition. The ambidextrous safety lever and HK416 Slimline furniture give this California compliant 7.62x51mm tactical rifle the professional-grade ergonomics and controls that HK s military and law enforcement platforms are known for worldwide. At 9.84 lb. with a short stroke piston system that keeps carbon and heat away from the bolt carrier the MR762 A4 delivers long-term reliability and consistent accuracy through sustained use. One included 10-round magazine completes a fully configured suppressor-ready California-compliant package. Heckler and Koch MR762 A4 Specifications Manufacturer: Heckler and Koch Model: MR762 A4 Caliber: 7.62x51mm 308 Win Type: Rifle Action: Semi-auto Capacity: 10+1 Barrel Length: 16.5 Barrel Twist: 1:11 Barrel Profile: Threaded Thread Pattern: 5/8x24 Overall Length: 35.5 to 39.5 Weight: 9.84 lb. Finish: Black Receiver: Fully ambidextrous lower Operating System: Short stroke gas piston Handguard: M-LOK Stock: HK416 Slimline collapsible and folding Safety: Ambidextrous safety lever Charging Handle: Extended ambidextrous Sights: None State Compliance: California Includes: 1 10-round magazine