This poem was really sad, I really like your soldier poems especially when I try and look for some really good ones. Your imagery only added to the set tone of the poem which did lift u p towards the end of it. A few lines did run a bit awkward like when your stanzas went from four lines to five such as:
"My only true friend,
who I never had to cry for.
Was my honest and dear steel cold,
clean and oiled rifle."
But otherwise your poem was exceptionally well I look forward to reading more of your poems.