Scope Ring 30mm High-quality 6061 aluminium scope ring designed for the Commander NV400 — also compatible with any 30mm tube scope. Features Purpose-built for the OneLeaf Commander NV400 series. Fits any scope with a 30mm tube diameter (standard size). Mounts to a 20mm Picatinny rail. Strong 6061 aluminium alloy construction. Tool-free rail clamp using a hand-twist nut. Two clamp screws per side for a secure hold. Specifications Material: 6061 aluminium alloy Ring Size: 30mm inside diameter Rail Base: 20mm Picatinny SKU: SR200 Compatibility: Commander NV400 or any optic with a 30mm tube Mounting Screws: 1 x rail clamp screw (hand tight) + 2 x clamp screws each side Description This precision scope ring is built specifically for the OneLeaf Commander NV400 night-vision scope, but it also fits any 30mm tube scope that mounts onto a 20mm Picatinny rail. The 6061 aluminium body provides strength and light weight, and the tool-free twist-nut makes installation quick and easy in the field. The dual-screw clamp system ensures a secure hold around the scope tube, keeping your optic stable under recoil and outdoor conditions. It’s an ideal replacement for the original NV400 ring or as a universal 30mm Picatinny-mount scope ring. Compatibility Notes Fits all 30mm tube scopes (Commander NV400 and other brands). Does not fit 1" (25.4mm) or 34mm scopes. Requires a 20mm Picatinny rail for mounting. Check that your scope body has normal 30mm tube dimensions with no oversized external housings. What’s Included 1 x 30mm scope ring for Commander NV400 / universal 30mm scopes All screws and mounting hardware