CA Compliance Mod completion
Bullet button nut was possibly fastened with thread locker. Had to use vice grip pliers to get leverage on the fastener to break it loose and remove. Tool was damage at the contact point with the pliers, but the mating teeth to the nut seemed to hold up and is possibly good for a couple more uses on my next California compliant AR's.
Reviewed by: (Verified Buyer) from Los Angeles, CA.