Heckler & Koch MR762 A4 Upper Receiver Features The Heckler & Koch MR762 A4 Upper Receiver delivers exceptional performance as a premium .308 AR-10 upper receiver engineered for precision and reliability. Its 13 match-grade cold hammer forged barrel offers excellent durability and accuracy while suppressor-ready 5/8x24 threads allow easy attachment of compatible muzzle devices or suppressors. The adjustable gas regulator allows the system to be tuned for different ammunition types and suppressor use. This upper receiver group features HK's free-floating M-LOK handguard paired with a continuous Picatinny rail interface between the handguard and receiver for stable optic and accessory mounting. The medium contour barrel profile balances durability and weight while the extended convertible charging handle supports improved manipulation during operation. Designed as a complete assembly it includes the bolt carrier group buffer weight and buffer spring for a ready-to-install upper receiver package. Heckler & Koch MR762 A4 Upper Receiver Specifications Manufacturer: Heckler & Koch Model: MR762 A4 Upper Receiver Caliber: 7.62x51mm .308 Win Fit: AR-10 Barrel Length: 13 Barrel Material: Cold Hammer Forged Steel Barrel Profile: Medium Contour Thread Pattern: 5/8x24 Gas System: Adjustable Gas Regulator Handguard: Free-Floating M-LOK Finish: Black Anodized Height: 2.68 Width: 3.07 Includes: Bolt carrier group buffer weight buffer spring