EVO II Stainless Steel Muzzle Loader Action


Out of stock



The Mack Brothers EVO II Stainless Steel Muzzle Loader Action is designed to use the Arrowhead GEN II breach plug. It starts from a 416 heat treated billet, and is CNC machined in only two operations eliminating possible “tolerance stack” in the manufacturing process.

The solid bottom Muzzle Loader action comes with a self-indexing 17-4 stainless steel recoil lug, tool-less fire control, complete bolt, and a two piece aluminum 0 MOA Picatinny rail. The enhanced recoil lug adds thread tenon length for more contact with the barrel, increasing rigidity and overall precision in the rifle system. Additional features include a streamlined external bolt stop rotated five degrees above the stock line eliminating the need to inlet the stock for clearance. The bolt stop position is also modified to allow the bolt face to be present in the ejection port when the bolt is open. This allows for ease when loading the Arrowhead GEN II LRMP modules.

The one piece bolt body is CNC machined from a 2″ round heat treated 4340 blank in only one operation. Each bolt is nitrided for reduced friction and superior durability. The bolt handle is threaded 1/4-28 and is compatible with two other bolt handle options that are available separately. These knobs are only compatible with the EVO Gen II bolts.  All parts proudly made in America.

Weight: 30.9 oz.

NOTE: Send FFL or FFL contact information to ffl@macbros.com along with your order number.

Additional information

Weight 1.93 lbs
Dimensions 8.25 × 1 × 1 in


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