Interesting letter, reply, and snippet from the WT article.
Gotta love the weasel wording "spiritually mature Christians choose not keep a firearm" - rather than coming right and saying "you, Brother Gunsmith, are a spiritually immature dolt".
Just like when people say "any reasonable and intelligent person would agree that...[insert personal opinion here]" which implies that anyone and everyone who holds a different opinion than yours is a stubborn buffoon.