Brownells Detent Ball Refill 5/32" (4.0mm) - 20 Pack

The Brownells Detent Ball Refill Kit provides 20 replacement detent balls measuring 5/32" (4.0mm) in diameter. These small but critical components are essential for gunsmithing and firearm assembly work, used to secure pins, selectors, and other small parts in place. Ideal for bench stocking or replacing lost and worn detent balls during rifle, pistol, or shotgun builds and repairs.