Fits 580 Series with a barrel diameter of 0.625 or 5/8".
Fits New Mini-30 with a barrel diameter of 0.625 or 5/8".
Measure your barrel BEFORE ordering to ensure fit.
For use on rifles with a barrel diameter of .625, make sure to measure the barrel before you order, some of the early 580 series rifles have the smaller .562 barrel (Does NOT fit).
Made of solid steel, SS. Fits most 580 and higher series rifles.
The compensator is attached to the gun barrel by a 1/8 inch spring steel roll pin.
We suggest this unit be installed by a gunsmith.