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Caliber:
.308 Winchester, 7.62x51mm NATO
Barrel Length:
13 in
Barrel Profile:
Medium
Barrel Twist Rate:
1-10
Firearms Threads Per Inch:
5/8x24
Handguard Type:
Free-Float
Muzzle Device:
Flash Hider
Finish:
Anodized
Color:
Black
Handguard Length:
11.25 in
Barrel Material:
Steel

Code: 13-URC-MNHJNBH-51001919

MPN: 51001919

UPC: 642230272545

List: $3,049.00Save 13%
$2,649.00

ATTENTION! We currently do not ship this product to P.O. Boxes, AK, CA, CT, DE, HI, MA, NJ, NY, U.S. Territories, or select Colorado locations. Please see our policies for more information or a detailed list of locations.

Product Info for Heckler & Koch MR762 A4 7.62x51mm NATO 13inch Upper Receiver

Complete MR762 A4 Upper Receiver/Barrel Assembly HK 13in cold-hammer forged barrel, upper receiver with forward assist, extended convertible charging handle, HK Free Floating Rail System handguard.image

WARNING: California`s Proposition 65

Specifications for Heckler & Koch MR762 A4 7.62x51mm NATO 13inch Upper Receiver:

Manufacturer: Heckler & Koch
Caliber: .308 Winchester, 7.62x51mm NATO
Barrel Length: 13 in
Barrel Profile: Medium
Barrel Twist Rate: 1-10
Firearms Threads Per Inch: 5/8x24
Handguard Type: Free-Float
Muzzle Device: Flash Hider
Finish: Anodized
Color: Black
Fabric/Material: Aluminum
Handguard Length: 11.25 in
Gun Rail: Free Float, M-LOK
Gun Make: Heckler & Koch
Gun Model: Heckler & Koch MR762-A4, Heckler & Koch MR762-A1
Barrel Material: Steel
Gas System Type: Short-Stroke Piston
Magazine Included: No

Features of Heckler & Koch MR762 A4 7.62x51mm NATO 13inch Upper Receiver

  • Complete MR762 A4 Upper Receiver/Barrel Assembly HK cold-hammer forged barrel, upper receiver with forward assist, extended convertible charging handle, HK Free Floating Rail System handguard
  • Complete MR556 Bolt Group Assembly
  • Tungsten Filled HK Proprietary Buffer
  • HK Proprietary Buffer (Action) Spring
  • Adjustable Gas Block
  • Ships in HK Soft case

Package Contents:

  • Heckler & Koch MR762 A4 7.62x51mm NATO 13inch Upper Receiver

Heckler & Koch MR762 A4 7.62x51mm NATO 13inch Upper Receiver Orderable Models

List of Orderable Models

  • Heckler & Koch MR762 A4 7.62x51mm NATO 13inch Upper Receiver, Medium Contour, Short Length, 1-10 Twist, 5/8x24 Threads, Break, Black, 51001919 , MPN: 51001919 , UPC: 642230272545 , Code: 13-URC-MNHJNBH-51001919
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Last updated 2026-07-02 UTC.