This Extended Flash Hider is based on the original M16A2 design (solid bottom to prevent dust from kicking up). The difference is in the length. This is a first class manufactured in USA A2 extended flash hider, to use to pin to a 14.5" barrel to make it street legal, with an overall barrel length over 16, " when attached, pinned and welded. Contains a open pin slot on the under-side. Crush washer included.
NOTE: The flash hider must be permanently attached. This flash hider is pre-drilled with a 3/32 hole for a pin, weld, etc.
1/2" - 28 threading for most AR15 / .223 / 5.56mm rifles.
Note: This item requires installation by a qualified gunsmith, if you are intending to use a permanently attached muzzle device.