Fits barrel diameter up to 1.070″ one and a half inches behind muzzle shoulder. Tuner brake combo, 2 great products in 1.   Heavier tuner – With most match barrels being larger/heavier contour. Our tuner will be able to tune even the heaviest contour barrels with ease. Heavier tuners will find the optimal node within a revolution or 2. No more wondering if the tuner will work or...