10bp4 or fp4

[Eric H]

The 10FP4 is the aluminized one that needs no trap. Assuming it was never rebuilt with a bent gun at some point.

[timmy]

Originally Posted by Eric H

The 10FP4 is the aluminized one that needs no trap. Assuming it was never rebuilt with a bent gun at some point.

I thought the bent gun is the one that requires an ion trap. The 12lp4 has a crooked gun and that needs an ion trap.