MK Machining is excited to offer Athlon Scope Caps. Our Scope Cap Sets are made out of a Nylon 11 material using one of our HP MJF 5210 3D Printers. Nylon 11 is slightly flexible to fit over your scope objective without becoming brittle and is strong enough to handle wear and tear. Our scope cap sets are sized down to the thousandth of an inch for a precise fit. No one size fits most options here. Scope caps feature a custom-made spring for full range opening and closing of the cap without unnecessary force & noise. Caps slip over your objective & ocular end and are tightened down using a single bolt. Compatible with MK Machining ARDs.