The PA4-14SS sun shade is a useful addition to your 4-14×44 FFP scope. The sun shade can prevent glare when shooting in bright sunlight at certain angles, and can keep water away from the objective lens in the rain. The sun shade easily screws into the objective bell of the scope with no tools needed. The compatible models are: 4-14×44 FFP scope with HUD DMR 5.56, 4-14×44 FFP scope with ACSS ORION, 4-14×44 FFP scope with MIL DOT, 4-14×44 FFP scope with HUD DMR .308 and 4-14×44 FFP Scope with ARC-2 MOA.This sun shade will not work on other models of Primary Arms scopes, nor on any other manufacturer’s scopes. This tough sun shade features a 3-year warranty.