IF you want info on pre ban Sr-25k's:
There were 100 pre ban SR-25k's made by Knight's.
The Sr-25k's were serialized 1 to 100....Configured with collapsible stock, removable carry handle, case deflector, removable front sight, 16" bbl with flash suppressor...and came in a fitted Pelican case...Even included a cleaning rod/w guide which was fitted diagonally in the top case lid! Also came with 3 mags....The case had fitted slots for all items(carry handle, front sight sight, bolt/carrier, mags..etc.
All in all a great package...Supposedly shoots 1.5" at 100yds!
I personally had #99 in hand and decided not to buy at the 5K price and also because of the great amount of slop between the upper and lower..
SR-25k #99 was last seen at R N J Guns & Ammo in Carson CA back in '99....Wonder whatever became of it!!!