Ball bearing for Williams FoolProof sight

[ohland]

While diddling with a T/C Contender FP, the ball came out while trying to install some target knobs. No time like the present...

Ball bearing measured .124"

[Norbrat]

1/8" ball, bicycle shop

[scb]

http://www.mcmaster.com/#chrome-steel-balls/=f6uqco

[cheese1566]

Ace Hardware in the little pull out assortment boxes in the fastener aisle.