HK MR762A4 Upper Receiver Kit

The HK MR762A4 Upper Receiver Kit is the core of the HK 7.62mm proprietary gas piston operating system. This complete kit includes the upper receiver/barrel assembly, a bolt carrier assembly, buffer and the buffer spring that allows the Mil-Spec 7.62mm AR style rifles to be retrofitted to HK's piston and pusher rod system. HK's MR762 Upper offers a solid operating 'pusher' rod in place of the gas tube that is normally found in AR15/M16/M4 style firearms.

HK has designed the MR762A4 Upper Receiver Kit to be fully interchangeable with all high end AR style weapons. It is easily attached to an AR lower receiver with standard takedown pins. An HK piston driven operating system eliminates malfunctions common to direct impingement gas systems. Hot carbon fouling and waste gases never enter the receiver area. Military and Law Enforcement users have enjoyed this feature on the HK416 upper receivers.

Xtreme Guns and Ammo is one of the nation’s top Heckler and Koch Firearms Dealers and carries a huge inventory of HK Pistols, HK Rifles and HK Magazines and Accessories in Stock and on Sale. Shop online anytime, chat with the HK Pros online during business hours or call 832-363-3783 for answers to all of your HK questions and needs.

The HK MR762A4 Upper Receiver Kit (Specifications):

• Caliber: 7.62X51mm
• Barrel Length: 13 inches
• Height: 2.68 inches
• Width: 3.08 inches

The HK MR762A4 Upper Receiver Kit Includes:

• Complete MR762 A4 Upper Receiver/Barrel Assembly
• Barrel: 16 inch or 13 inch, Cold-Hammer Forged
• Forward Assist
• Extended Convertible Charging Handle
• Rail System: HK Free Floating Handguard
• Complete MR762 Bold Group Assembly
• Buffer: Tungsten Filled HK Proprietary
• Buffer Spring: HK Proprietary
• Adjustable Gas Block
• Soft Case