Rec-mounts Picatinny Rail Mount Type2 for Gopro [Rec-b35-l] for GoPro HD HERO HERO2 HERO3 HERO3+ HERO4 Material Aluminum facebook https://www.facebook.com/recmounts catarog(PDF) http://www.an-y.com/img/rec-mount-catalog2.pdf twitter https://twitter.com/RECMOUNTS