Anybody who thinks they need Viagra injected into their sling has bigger (or smaller, depending on your perspective) issues than their sling....

Bungee slings were built specifically for one specific military unit that uses their M4's (now H&K 416's) in a.....unique way. Now, everybody's got to have a bigger / better / faster without having a clue what they were designed for in the first place, and some of the drawbacks of having a bigger / better / faster "Viagra injected" bungee sling.