B-13N is designated for Dragunov SVD family rifles. It will work with Russian Tiger and Norinco NDM-86, both in 7.62x54R and .308. This  side mount conversion allows to mount weaver scopes on your favorite Com Block rifle. Main features of this mount:

-- light weight yet very sturdy, due to being machined entirely from a solid block of hot rolled aluminum

-- extra long top rail which is practically covering the entire dust cover

--- very low profile, the mount is no more than one 10th of an inch above your dust cover.