The Seekins Precision Select Adjustable Gas Block is the perfect accessory for gun builders who are looking to tune up an AR to either cycle certain loads, or lower the recoil impulse of your current ammo selection. The Seekins Precision select adjustable gas block is Melonite coated to reduce wear and corrosion during extended periods of fire.

Specifications and Features:
Seekins Precision AR-15 Select Adjustable Gas Block 0011510065
Select Adjustable Gas Block
.750" Diameter
40 position fine adjustment
Tool-less gas selection switch
Suppressed or unsuppressed
Tool Steel
Melonite Coated
Matte Black

Note: For suppressor use:
1. Set the initial gas setting with suppressor on so the bolt locks back on an empty magazine.
2. Add ONE click
3. Attach the gas switch, and position it all the way to the left (this will be the minimum amount of gas you will need).
4. When you want to remove the suppressor simply take it off and rotate the gas switch to the right adding the amount of gas needed to cycle properly un-suppressed.
When you're ready to re-install your suppressor, rotate the switch back to the left and your good to go.

*Another option is if you are shooting a suppressed .300BLK and want to switch between subsonic and supersonic ammo simply position the gas switch to the left for supersonic and rotate right (to add more gas) for subsonic ammo.