Thread on Barrel for Silencer

[Andrew Leigh]

Hi,

what would the accepted thread be on a barrel to accept a silencer. I see one can order the CZ with a thread but it is UNF are our silencers threaded for metric threads?

[Davidc]

Threads are cut according to requirments. LM is M13x1 IIRC (13 being the diameter and 1 being the pitch 1 thread per mm) but AR's are Imperial. Metric is cut at 60 degrees and Imperial is 55 degrees. Imperial is measured as TPI Threads per Inch. In SA most silencers made locally will be metric. The caliber will also dictate the minimum OD you can get away with.

[Andrew Leigh]

Cheers.