Check the listing for details. Barrel Tuner V2. Color: Silver, Condition: New. Listed at 149.99 USD. The version 2 of the barrel tuner is hereMade in the USA from 416 stainless steel the version 2 strong and sturdy.Tt includes a stabilizing o-ring to provide tension and to eliminate backlash making for repeatable results while eliminating the need for a set screw.The 24tpi thread makes for 15 full revolutions of adjustment and will adjust outwards at 3-thousands of a inch per mark making it extremely accurate.All parts have single-point cut threads and are machined in one operation to insure quality and alignment. The new design is a direct thread to standard muzzle threads which gets rid of the need to buy a adapter, this tuner is made for factory contour barrels instead of 1.25 straight profile barrels like most other tuners are made for.Tuner dimensions are as followed:Small shank is 0.85 inches in diameter and the large shank is 1.2 inches in diameter. overall length in the shortest configuration is 2.4 inches and it weighs 9 OZ.Avaliable threads are 1/2-20, 1/2-28 and 5/8 24 (308 bore) for use in centerfire riflesseparate adapters or "small shanks" will be available for purchase so you can use 1 tuner on many separate rifles with different threads. special order threads are available for custom order