FYI for the noobs........ Little clip on MP5 magwell side, what it's for
 

Often wondered myself, knew it had something to do with the sling, but here is what it's really for:

YouTube- SAS Weapons

Figured I'd post this cuz it's a cool video, and I just made a bungee sling same as shown for my new Crosman Stinger shottie. Not too bad at all actually.

If you liked that video, you should watch the mini series it came from, heres the link

YouTube- SAS Survival Secrets (Episode 1/7 - Part 1/6)

Ya, watched a few of those episodes a month ago, really interesting stuff.

Love his accent. One of the guys on the show was the one seen blowing out the window in the Iranian Embassy seige. In one of the episodes he talks about it, really cool.

That same guy (with the big bushy mustache) now runs an airsoft training school in the UK.

I've read a lot of books: The consensus is that everyone who has ever served in the SAS was on that balcony. :)

That IS the actual guy that was the first on the balcony.

I was on that balcony...

You too? I thought I recognized you... pretty crowded, wasn't it?

sir i will ask kindly that you not take credit for my work!:D

Hey, it was a big balcony... :D

Sup, I was temping as a balcony that day... It was pretty crazy.

Balcony party, I was there, I was doing the cuin'. Pork ribs anyone.

Lol guys!

I brought the tactical SAS keg! Its got a torch on it, where ever that torch is pointed is where your beer is going.