What is that pin in my barrel for??

[GallagherAtWar]

I got a pin in my barrel and its held down by the 2 o rings and its in the squiggly indention in my barrel what is it

[irbodden]

That keeps the balls from rolling out, it's called a nubbin. AGD makes new plastic nubins that don't ever break paint, but if your doing good with the wire ones, don't change. I never had a problem with the wire, but I got some plastic nubins free

[punk3rs]

where do i get these FREE nubbins?
i dont wanna pay for em

[irbodden]

I was at the tour, I believe your going to be stuck paying for them

[Cha0tic]

ok, new people to mags. as soon as you get your mag, call AGD and register your gun. you give them your name, address, phone #, and marker serial number (on side of valve), and then ask for a video and plastic nubbins. they are very nice and will be glad to give ya a hand, or at least in my past expiriences....