The Swinger® SOPMOD stock is built on a B5 enhanced SOPMOD stock with our patented B5 insert, constructed from 7075 aluminum with a mill spec type three hard anodized coding, pre-installed. Use with The Swinger® sling mount for 200° of rotation with your sling, eliminating tension and binding when transitioning from strong to weak side. A revolution in tactical maneuverability. 
 
Once you use this system you will never go back to your old set up.