Ultra Sound Cleaning

[Breck Gorman]

Ultrasonic works great on old crud. Doesn’t damage case coloring. But it will damage springs. Strip the receiver, and clean springs by hand.

[edgarspencer]

Originally Posted by Breck Gorman

Ultrasonic works great on old crud. Doesn’t damage case coloring. But it will damage springs. Strip the receiver, and clean springs by hand.

I've never heard of a coil spring being broken in an ultrasonic bath, but flat springs, such as those in a Hammer gun lock, start to resonate like a tuning fork at certain frequencies, and there have been a few cases of reported broken springs right at the return bend.