Check the listing for details. CONETROL bases and 1" Ring set for SAKO Monoblock Receiver FORRESTER FINNBEAR +. Color: Blue, Condition: New other (see details), Made in United States. Listed at 172.50 USD. A hard to find complete set of Conetrol #8 projectionless rings and the bases to fit a Sako rifle like the Forrester, L-61, Finnbear, Garcia Sako etc. that have built-in receiver blocks. The bases are tapered and "tap" to the receiver blocks and anchor with a set screw like a Redfield SDT Sako adapter except even the set screws are hidden.A hard to find complete set of Conetrol #8 projectionless rings and the bases to fit a Sako rifle like the Forrester, L-61, Finnbear, Garcia Sako etc. that have built-in receiver blocks. The bases are tapered and "tap" to the receiver blocks and anchor with a set screw like a Redfield SDT Sako adapter except even the set screws are hidden.