5/16" 25 Grain 4mm Collars 6-Pack

CMI Archery 5/16" 4MM Arrow Collars — 416 Stainless Steel

Precision-machined from 416 stainless steel and heat treated for maximum toughness and durability, the CMI Archery 5/16" arrow collar is engineered for consistent performance and long life. Manufactured to the highest standards of straightness and tolerance control, these collars deliver reliable fit and repeatable flight characteristics for competitive archers and serious bowhunters.

Key features

• Material: 416 stainless steel for corrosion resistance, machinability, and strength.

• Heat treated: Optimized hardness and impact resistance for long service life under field conditions.

• Internal diameters available:

  • .233" (fits shafts measuring up to .233”).

  • .238" (fits shafts measuring up to .238”).

  • .244" (fits shafts measuring up to .244”).

• Precision tolerances and straightness: Ensures concentric fit and consistent arrow balance.

• Weight: 25 grains — designed to pair with CMI 25-grain deep 6 4MM stainless HIT inserts.

• Versatility: When used with our 25-grain insert, yields a consistent 50-grain total weight.

Why choose CMI collars

• Consistent mass and concentricity improve arrow tuning and downrange accuracy.

• Durable stainless construction and heat treatment resist deformation from repeated use and impacts.

• Manufactured in the Rocky Mountains of Western Montana with rigorous quality control to meet the demands of serious archers and bowhunters.

Each collar is inspected for fit, finish, and concentricity before shipping. Build your arrows with components engineered for precision and durability — choose CMI Archery arrow collars for a reliable foundation to your arrows.