Making a 416 out of a 421

[magnarc]

A 416 kit does fit into a 421. GPA has done it before. However the 421 has a back vent so must have a front cap with no vent hole..

In the case of spec sheets though, you can certainly believe when one has a ceramic and the other Alnico, that they aren't the same magnet.

OTOH I do not know if the later 416 with ceramic uses the 421 mag. Good chance, but just plain dunno.

OK Thanks for that.