Cambo, there are a few things you are obviously missing. You are being very selective in your choice of quotes to support your case.
First, on the ten commandments, the "thou shalt not kill", means murder. The Hebrew word Tirtsach means kill on an individual level. War is considered as a state or country level, which is a different word. So war does not go against the ten commandments.
in the New Testament Jesus mentions:
"Or suppose a king is about to go to war against another king. Will he not sit down first and consider whether he is able with 10,000 men to oppose the one coming against him with 20,000? If he is not able, he will send a delegation while the other is still a long way off and will ask for terms of peace."
"if you don't have a sword, sell your cloak and buy one."
The main issue and confusion people have is when he states something like:
"Peace I leave with you, my peace I give unto you: not as the world giveth, give I unto you. Let not your heart be troubled, neither let it be afraid"
But he is not talking peace as in world peace where all countries are not at war and sing "Kumbaya", but an inner peace, where people are at harmony on an individual level, with themselves and others.
But what is this accusation that the CofE supports arms dealers? That's a bit far fetched.