Here in the printer’s manuscript, Oliver Cowdery initially wrote and (as an ampersand) instead of the correct of. Extant portions of 𝓞 indicates that page 354ªof 𝓞 ended with the phrase “& all manner of weopons of war”, which apparently led Oliver as he was copying from 𝓞 into 𝓟 to assume that this was the end of the phrase and that the following word was and. Oliver’s correction in 𝓟 of the ampersand to of was virtually immediate: he crossed out the ampersand and supralinearly inserted the of without any change in the level of ink flow.
Elsewhere the text has 13 examples of “all manner of X of every kind”, including two more instances of “all manner of weapons of war of every kind” (in Alma 2:12, 14). More generally, there are 98 examples of “all manner of X” without any postmodifying “of every kind”, including three examples of “all manner of weapons of war” (in Alma 43:18, Mormon 6:9, and Ether 10:27). Thus it is not surprising that Oliver Cowdery could have assumed that “all manner of weapons of war” in Alma 60:2 was not followed by “of every kind”. For each case of “all manner of X (of every kind)”, the critical text will follow the earliest textual sources, thus “all manner of weapons of war of every kind” here in Alma 60:2.
Summary: Maintain in Alma 60:2 the phraseology “all manner of weapons of war of every kind”, the corrected reading in 𝓟.