Hello, I am the manufacturer of these supports. I have two, of the ones in the link, left. They are patterned after HK's design. However I have a newer redesigned and improved support available now, which includes the detent. They are about 60% lighter than steel. I would post pics but I am not regular on this forum and cannot yet. There is more information and pictures on the Weapons Guild forum, where I am settup as a vendor. I have sold to many Weapons Guild members, perhaps if you ask for feedback on my products there you will get more customer testomonials. I also have some products listed there that are not on Gunbroker.