Do i need this???

[LRRPF52]

I have two of them...one for AR15 and one for AR10. I haven't used them yet, since they were gifts from the owner of POF at 2010 SHOT. It's actually a design Colt had on their AR-10A prototype that was never built. Guys that have used them show that they cause the same wear on the upper as a regular cam pin. Colt might have gotten these ideas from the Dutch, who made the first version of what would become the charge handle we no know.

I put one in my retro Model 605 project's bolt carrier group just so I could have something more hidden in it, since it's a sleeper.

Short answer: No