lightly used spikes tactical dynacomp in 308 size / thread pattern, that will allow the spikes supressors to be mounted to them with proper gunsmithing install. this was mounted to an Remington 700 AAC in 308, and was shot about 5 times, the rifle was sold off and so I kept this in my toolbox of gun parts. there is one tiny blemish on the thread protector for this muzzle brake as you can see in the photos but that does not affect performance, but I want to state that so people can see any defects. since it is used, I must state that its sold as is , and no returns. the threads on this muzzle device are perfect. thread is 5/8-24 (common 308 threading) . want $80
info pulled from spikes website , Dynacomp Extreme H.V.S.-.308 Muzzle Brake is Threaded for Spike's Tactical MRS/LRS Suppressors. It can also be used for OPS Inc.suppressors, model 12.
shipping I can do for around $3 if you request for first class , but I tend to go with USPS small flat rate box for expedited shipping which is $6