Griffin Armament Dual-Lok, Suppressor, 556NATO, Black GADL556-W Griffin Armament's DUAL-LOK model is the lightest model in the DUAL-LOK family of suppressors. Griffin utilized the new DUAL-LOK locking mount system with this suppressor, an often demanded feature by government customers. This combined with multiple generations of R&D brought a compact, highly durable, low flash, and top performing suppressor to market for government and civilian customers.