True Precision Micro Compensator 9mm 1/2x28
 
PRODUCT OVERVIEW:
Designed specifically for True Precision barrels, but ready for most 9mm and .380 barrels with 1/2x28 Threads. 
Tension lock o-ring for hand-tight installation to prevent back off.*
Made from USA-sourced solid 316L Stainless Steel bar stock.
Designed, assembled, and machined in the USA.
The multi-port design includes three slotted 90-degree ports with a tapered front crown to direct gasses away from the muzzle and reduce felt recoil. 
The overall length is .787".
Outside diameter at widest: .745", with a taper to .650" at narrowest (barrel end). 
Multiple Diffrent Coatings
 
*Optional use medium hold thread-locking compound for semi-permanent installation.