Looking for Bullet Buttons

[bohoki]

Saw these pop up on ebay for $5 each.

https://m.ebay.com/itm/CARBB-California-Magazine-Lock-Release-Button-for-223-556-308-762-Rifles/282877666925?hash=item41dcd2a66d:g:S6AAAOSwDtVaorco

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they are ok i bought one and modded it by putting in a little piece of a 22 casing instead of the internal spring then epoxied the hole to make it a fixed magazine