Griffin ATM (Advanced Threaded Match) Barrels are billet machined from 416R chromium stainless steel to exacting tolerances for the ultimate in drop in match performance. 5 axis machining done in a single work holding positions all critical dimensions on the breech ensuring theoretically perfect geometrical relationship of barrel, slide and locking lug. 
Features:
 416R Pre-hardened chromium stainless steel 
 Black Nitride finish 
 ½"-28 threaded muzzle for suppressor or accessory support 
 1:10 twist rate 
 Overall length : 5" / with comp : 5.26" 
 Looking for a compensator to pair with your threaded barrel? They can be found here. 
Please Note:
 Fits Gen1-5 Glock 19/19X/45 & Gen 5 Glock 17/47/49