I have these on 2 of my ARs and they've been used in two separate classes as well as on range trips for a few years now. No issues to report. I don't actuate the hook tons, but it's been well used and they still function.
NRA Life Member Steak: Rare. Coffee: Black. Bourbon: Neat.
I saw some today on Centerfire Systems website for $4.99 ... They have flat rate shipping for your entire order ... So I ordered 2ea of 2 different types of ammo cans in addition to a 75 round AK drum for $59 and a 10 pack of mags for my F/A M11/Nine with the Sten Mag conversion ... shipping for it all was $9.99
They may be a bit more but if there's other stuff you want it may be cheaper!
If you really want something you'll find a way ... ... if you don't you'll find an excuse.
I'm really not a "kid" anymore ... but I haven't grown up yet either