Looking at Brownells, the devices are like a hundred bucks. A bit pricey to try one just because you see it at the gun store and are curious. However, the sense of a risky-purchase drops if you have a friend who recommends it based on their personal experience.
So get one and try it and post a follow-up.
First I’ll confirm the make and model he uses. Don’t know if it’s the one from Brownells or the other one posted by a FReeper.
AR’s (and all guns) are like boats — you drop money on them just ‘cuz you can. ~$100 for a cool gizmo recommended by a true warfighter you personally know is worth the risk.
I’ll see what I can do and post back here and ping you.
I pinged my friend to get clarification on the model of buffer he and his team employ.
Pretty sure it’ll be the Enidine.
I let him know the reaction of some of the posters here that amount to ‘real men don’t need it.’ Telling him something like that would be akin to telling a former Seal, or Marine Force Recon the same thing. Not saying he wasn’t all of those, but ... you tell him to his face he doesn’t need it ;-)