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Genuine Heckler & Koch adjustable gas block.

This gas block is used comes with all the internal parts.

  • Gas block
  • Spring
  • Detent
  • Roll pin

* The adjustment lever that comes with this gas block looks like it has been altered in some way but upon close inspection I do not not believe it would prevent the gas block from functioning correctly. That said, the adjuster is a “#8” so you will have to figure out what adjuster is correct for your application and either use this one or replace it.

* The spring included is the HK triple wound style designed specifically for this application.