There are a few very necessary tools and parts required for this modification. A set of punches (roll pin and standard), a hammer, a crescent wrench for the flash hider, and a special front sight base bench block will make this task easy and successful.
|Removing the gas tube roll pin|
|Using a punch to drive out the taper pins|
|Front sight base with taper pins removed|
3. Now, install the gas tube into the new gas block by correctly inserting it, making sure to have the roll pin hole aligned so that the roll pin can be driven through using a roll pin punch and finished with a standard punch. Once this is accomplished the gas block is ready to be mounted on the barrel, and the attached tube inserted back into the upper receiver.
The taper pins from the original front sight base will leave two crescent shaped marks on the bottom of the barrel, so if you do not want this visible it is important to select a gas block that will cover these marks (something larger than a low profile style, usually).
It is very important to make sure the gas port of the gas block is centered over the gas port of the barrel. This can be done by sighting down the barrel from the end of the upper receiver, and if you use handguards that do not require an endcap, make sure that you leave a thin space (the thickness of the endcap), and do not mount the gas block all the way back to where the barrel profile thickens.
|YHM Specter gas block installed|
4. If your gas block uses set screws or is a clamp on style with tightening screws/bolts, a little loc-tite should be applied once the gas block is mounted and you are sure the weapon is operational. If it is a clamp-on style with a number of screws, make sure that they are all tightened evenly and that any gaps between the two pieces of the gas block are equal.
Thanks for reading our blog. In upcoming blog entries we will continue to offer instructions on basic AR-15 modifications, so stay tuned. If you have any questions about gas blocks and what will work with your set-up, the parts we sell, or the rifles we manufacture at www.del-ton.com, please feel free to contact us.