Stumbled on this

[Jacksun]

http://www.blueovalchips.com/index.php?l=product_detail&p=64

Don't know if this is known about here or not, found while I was looking for a mag adapter.

 

[slowmkviii]

Good find
I think kirk got his cheaper from pep boys though

 

[philly0420]

You can buy that chit at Ace for like 2 bucks.