These 17-4 H900 Direct thread mounts will install in Dead Air suppressors with 1.203-28 (1-13/64 28) threads.
The M13.5×1 LH mount has the 25° Sig taper
In stock Natural finish or Black adapters ship 1-2 business days. Other color options add up to 10 business days.
.578-28, M13.5x1LH Sig Taper
Natural 17-4 H900, Burnt Bronze, Coyote Brown, Tan FDE, SOCOM Black, Grey-Black Colt Flat, OD Green, Flat Brown