Heat shields install by sliding under the Original Series Handguard and over the AR-15 castle bolt, and are tightened down to the barrel with the included end cap that will replace your muzzle brake. Handguard length, barrel length, length of gas system, and color specification required. Heat shields are made to fit the barrel lengths pictured below.
Only compatible with barrels of these exact lengths, and low profile gas blocks that are same width and length as the ones available on this website.
Pocket length for gas block on heat shields are as follows: