Nice Larue STOMP mount. Long since discontinued, used on a variety of CAG guns, mk11’s and other GWOT clones. This is the mount with the longer diving board, so it won’t fit 3-12x50 PMII S&B scopes. Fit my 4-16x42 PMII just fine, and would be perfect for an NXS or the like with 30mm spacers...