Now available at the Echo1 Web Shop, the Echo1 Mark 1 SR556 Barrel Extension gets reviewed by Angus... "Today we have the video review of the ECHO 1 Mark 1 SR556 6.75" Barrel Extension; this is a rather nice external upgrade that mounts on the included flash hider to enhance the look of your airsoft weapon, or to cover up an unsightly too long inner barrel. Simple to install, this barrel extension is solid and convenient, seeing as how it can simply be removed with a quick snap if needed. Thanks for watching!"