Checkered Main Spring Housing - Full Size Frames

Extreme Service Checkered Mainspring Housings for Government and Commander size frames

Checkered Main Spring Housings - Compact Size Frames

Extreme Service Checkered Mainspring Housings for Officers ACP, Compact and other reduced length frames

Serrated Main Spring Housing

Flat and Arched Serrated MSH in Blue & Stainless

MSH Completion Kits