Alternative to LOCTITE 380 Black Max?

[4th_point]

FYI - Bob Smith Industries sells a carbon and rubber toughened cyanoacrylate glue that is supposed to be comparable to 380. I wouldn't use either to bond rails or ringmounts, but thought I'd share.

Paid $13.78 for 1 ounce on Amazon.

https://bsi-inc.com/hobby/ic_2000.html