Which one would you go for if you could, and why? Much obliged.
SIG-556: http://www.sigsauer.com/Products/ShowCatalogProductDetails.aspx?categoryid=35&productid=114
DSA-Z4: http://www.dsarms.com/AR-GTC-Gas-Trap-Carbine-with-CROS-556-NATO/productinfo/DSZM4GTC/
SIG-556: http://www.sigsauer.com/Products/ShowCatalogProductDetails.aspx?categoryid=35&productid=114
DSA-Z4: http://www.dsarms.com/AR-GTC-Gas-Trap-Carbine-with-CROS-556-NATO/productinfo/DSZM4GTC/




















































