Caldwell AccuMax Barrel Cooler-Fits Mil-Spec AR-15

Caldwell Accumax AR-15 Barrel Cooler cools your barrel in half the time! The integral wind tunnel forces air through the chamber and down the barrel to drastically decrease cool down time. This function is performed with high pressure fan with dual motor bearings to promote a long life. Locks securely into any Mil-Spec mag using the magazine lock. Powered by a 12v Li-ion rechargeable battery with a run time of 3-4 hours per charge.