US U.S. military data matrix QR new serial code M4, P226, SCAR-L / H, Mk46, M320, M246 (japan import) Latest edition replica of the US military firearms management for data matrix serial code of M4 / M16 series, Mk24 / 25 P226, SCAR-L, SCAR-H, Mk46, M320GLM, for M246