I know of one other seller that is offering a Vz-58 AR-15 stock adapter. That one also sells for about $50. It comes in two angles of attachment, one for scope, and one for use of iron sights. I like this idea of the 4 adjustable heights, but I don't know if it would be robust enough to stand up to extended firing. Also, it would need to drop in price, to beat the other adapter that is already out there. I also think it should be made of steel, not aluminum. The folding mechanism would be nice...be able to have another option than that overpriced Israeli option. Just my $0.02.