Rugged Suppressors Oculus22: The Oculus22 provides class leading suppression with 2 configurations in one suppressor. With 100% Stainless Steel construction, more cleaning solutions are available and durability is unmatched. Standard Configuration: 5.25a ^2, Short Configuration: 3.25a ^2 Caliber ratings: .22LR belt-fed rated, .22 WMR, .17 HMR, .17 WSM, 5.7x28