Zaffiri Precision Blowhole Compensator is the perfect aftermarket addition for flatter shooting. Their solid 17-4 stainless steel comp allows for not only gas redirection but less muzzle climb due to its weight. What does that mean for you?! Faster follow-up shots. Features : "Thread Fits-1/2"X28" Machined from 17-4 Stainless Steel Includes: Vibra-tite Red 131 Thread Locker, Set Screws, and Tool GLOCK is a registered trademark of GLOCK Inc. 3CR Tactical is not affiliated with, endorsed by, or sponsored by GLOCK Inc. Any reference to GLOCK products is for identification and compatibility purposes only. STATE RESTRICTION NOTICE This product may be regulated as an "assault weapon" feature or component (e.g., threaded barrel, muzzle device/compensator, or assembled upper) and may be restricted or prohibited in CA, CT, DC, HI, IL, MA, MD, NJ, NY, RI, VA, WA, and select municipalities. It is the buyer's responsibility to verify local, state, and federal laws before purchase. Orders that cannot ship to a restricted address will be canceled and refunded.