Sat, 18 May 2013 07:19:33 GMT Ponoko - Items by GTFtOE8Y tagged with ds http://www.ponoko.com/showroom/GTFtOE8Y/9557 ae<br></br><img alt="Ar15_30_mag_spring_base" src="http://static2.ponoko.com/design_images/images/82024/d059f393-b476-dcbb-6d13-65ce3e8bfb2c/ar15_30_mag_spring_base.stl_showroom_image.png?1361213794" /> Mon, 18 Feb 2013 18:58:03 GMT http://www.ponoko.com/showroom/GTFtOE8Y/9557?time=Mon+Feb+18+18%3A57%3A33+UTC+2013 GTFtOE8Y