Cmmg Action Tuning Kit - Mkg-mkgs-mk57

FEATURES:
-Allows you to adjust the action to your preference much like changing buffers or changing gas port settings
on an adjustable gas block
-1 oz weight, 2 oz weight, 3.4 oz weight (standard 9mm), (3) .250"x.625" roll pins

• Availability: In Stock
• Model: '815835018751
• Brand: Cmmg