Drastically reduces wear and gas blow back when using a suppressor on the HK MR762 / MR308 / HK417 and clones.

Position N: Normal use without suppressor Position SD: Suppressor mode Position 1: When over gassed in Position SD Position 2: When over gassed in Position 1 Position N+: For use with low pressure ammunition or when undergassed in Position N

Adjustable without tools from the front, when used with short Quad-Rail or Slimline Handguard and fast and simple installation; no gunsmithing required.

Material: Steel Surface: Nitrided Weight: 180 g Manufacturer: Waffen Burk (Germany)

Including: 2 new roll pins and user manual/installation guide (German)

Advice: Use the original HK roll pins. The new roll pins shopuld only be used, if the original pins do not provide enough tension.