Unfortunately this gas tube is out of production and we can't get any more... the listing is still up as there are lots of links out there back to this page.
Please go here https://colonelmustard.ca/products/sks-gas-tube-picatinny-rail-scope-mount-w-two-side-rails to see the successor to this rail (which is generally in stock).
SKS gas tube scope mount. Rail on gas tube was designed to allow shooters to mount optics with long eye relief as a scout setup.
• Raised rail allows use of existing iron sights
• SKS Gas tube weaver style mount. Replaces existing gas tube
• Cut out on rail to allow use of iron sights
• Great for long eye relief scopes or reflex sights
• Fits most SKS models with minor modifications - the gas tube is manufactured just slightly longer, so that it can be hand fitted to the slightly different tolerances of the various SKS rifles
• Aluminum rail and steel gas tube
• Weight 8.7 oz. Length 9.6"
Model: NcStar MSKS