https://www.briley.com/p-61812-stage-saver-adapter.aspx
https://www.briley.com/p-61731-taccom-premium-stage-saver.aspx
Works great and if you get the Briley handguard, it's a perfect pairing. It's slightly off cant on my Agency handguard and my OCD won't stand for it. Save your match with that extra shot.... Or when the zombies have you cornered and you're out of ammo... Last shot for quick exit lol.
$25 shipped for both