HK G3 / HK33 / MP5 5mm x 28mm Steel Barrel Pin

Hardened steel 5mm x 28mm barrel pin manufactured to standard dimensions for use in HK G3, HK33, and MP5 platforms. This pin is the correct 5 mm dowel specification and is used to retain the barrel to the trunnion/receiver — a simple, reliable replacement part for repairs or builds.

• Size: 5mm x 28mm (diameter x length)
• Material: Hardened steel
• Finish: Natural / bright (uncoated) or heat-treated per batch
• Fits: HK G3, HK33, MP5
• NOTE: These are aftermarket / non-OEM pins. Verify fitment with your specific rifle/submachinegun variant before installation.

Hardened steel construction provides the shear strength needed for barrel retention in roller-delayed and other common receiver designs. For firearm installations, we recommend professional fitment to confirm correct headspace and secure installation.

Includes: (1) × Hardened steel 5mm x 28mm barrel pin. No other hardware included.