TexasCHLforum.com

I don't have a picture of it but I made an AR-15 lower receiver vice block out of an old AR-15 mag and a 6" piece of 1x2. Just gut a metal 30rd magazine (I used an old $9 surplus mag), and hammer a 1x2 into the mag from the bottom almost all the way to the feed lips. Insert the magazine as usual into the mag well and clamp the magazine into a vice. It works just as good as a $40 polymer vice block for a fraction of the price.