Beiter O-Ring Kit for Rifle Scopes & Sights - Premium Rubber Seals for Optics Protection (Hunting, Shooting, Airsoft Accessories)

The Beiter O-Ring slots onto threads on which you join together sight parts, and has two main functions: to increase friction and thereby, grip, as well as to absorb vibration and stabilize. The O-Ring is constructed from high-grade elastomere.

Specifications

• Size 4 x 2 mm is suitable for 8-32" 
• M4 threads; size 5 x 2 mm is suitable for 10-32"
• M5 threads. The thickness for both sizes is 2 mm