ANS Quick Pull Bolt

[Arrival]

1: The ball detent has never been fiddled around with. (I know what a ball detent is, but what exactly does it do?)
2: I have no objection to what roc said about the stock bolt. I would of been using that, but as you know, it's messed up.

 

[KillerOnion]

The ball detent allows one and only one ball to drop through the neck and sit in the breech at once before the bolt closes on it, preventing double feeds or, what is worse, halfway feeds that would chop. If you like your bolt to stay in great shape, see if you can get a delrin ball detent, as such don't scrape up the bolt as much.