Sylvan Arms gen 3 never mounted. I purchased a couple of these when Primary Arms had them on sale for $120. I know they have recently released a new version so I'll make this cheap enough for someone who doesn't need to have the newest version. I have this on a 10.5" and a 16" AR and they have never given me any trouble.

$85 shipped usps ppf&f or venmo. Less than half the cost of gen 4.