Hello, can you please tell me if I am able to purchase either of these two mags and have them pinned and imported. Also how are polymer mags pinned? Is it a rivet like a metal pistol mag is pinned? Thanks
http://www.irunguns.com/product.mag-...-556-30rd-gray
http://www.irunguns.com/product.magp...3-556-30rd-blk