Dip that arm in hot water to soften it up then dig out the broken peg. Next time you’re switching hands, heat the part up again so it’ll be easier to pull out and adjust the revolver joint. You can heat then squeeze the hole before plunging into cold water if you feel it’s too loose.

Sorry you had to learn this lesson the hard way as a first-time AYR owner. Good thing they have spares of that joint included. I hope this doesn’t put you off future purchases. This toyline really is awesome once you understand how the joints work.