Snowy Mountain Rifle Co. has three of these mag systems in stock ready to ship. Mag systems come with pillars and action bolts. Mag NOT included but we do have 5rd AICS mags available for additional cost. Mag system as shown in the pic priced at $250 plus shipping.
For those that don't know, these systems have a spring loaded plunger that pushes down on the mag so when the mag release button is pressed, the mag is ejected positively out of the mag well. This is a very very nice and robust design.