Genuine Heckler & Koch adjustable gas block.
This gas block is used comes with all the internal parts.
- Gas block
- 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.