My church meets in a school, so I'm obviously not able to carry there even if I wanted to.
I think it raises an interesting question as a Christian though. I've thought about it often myself. I will premise what I am about to say by reiterating the fact that I am completely pro-gun and pro-concealed carry. I think concealed carry is not only a lawful thing, but also the RESPONSIBLE thing to do. I'm not trying to turn this thread into a Bible study, but it's a Christian question that needs to be discussed with Christ on the mind. First and foremost as Christians, we must consider all things through the light of God's word; rather than beginning with our pre-conceived notions and making that the basis for our conclusions.
On the one hand, many will point out that Peter carried a sword. They will also point out (sometimes out of exegesis, I might add) where Jesus instructs his disciplies to "buy a sword" in Luke 22. At the same time though, let's not forget the fact that Jesus rebuked Peter in Matthew 26 when he drew his sword and struck the servant at his betrayal. ""Put your sword back into its place; for all those who take up the sword shall perish by the sword."
Had Jesus ever rebuked Peter for carrying a sword prior to this? No, he had not. Read on though, and Jesus explains "do you think that I cannot appeal to My Father, and He will at once put at My disposal more than twelve legions of angels? How then will the Scriptures be fulfilled, which say that it must happen this way?"
Jesus came to fulfill a specific task, and Peter's actions were not in alignment with Jesus' work. Jesus is quick to point out to Peter that, frankly, he was acting out of faith. Do you not think that I am in complete control of this situation? Furthermore, you knew that it had to go down like this from the beginning. Similarly, I think as Christians present day, we must remember that our task is first and foremost to minister as to show Christ to a fallen world of people that are running head-first toward their own destruction. By destruction, we don't mean financial troubles or hardship. We mean the just wrath of a holy God.
I can recall no circumstance in the new testament, post-Pentacost (the book of Acts and thereafter), where Christians are led to take up arms. In fact, we usually see the opposite happening. They preached Christ with boldness, and then they allowed themselves to be taken under the hostility of others (just look at how many of the apostles were martyred). The work of their faith and the joy in Christ was foremost.
When Jim Elliot and his companions went to minister to the tribes in Ecuador; it's recorded that at least two of them were definitely armed. One even fired a warning shot before they were attacked. However, they had determined ahead of time that they would not kill an Auca who did not know Christ in order to same themselves. It was concluded that they were ready for heaven. The Auca were not. A challenging thought.
TLDR? The only picture I want to paint is a reminder that Christ and the work of the Gospel must be first. Earthly security takes a backseat. As much as I may want to dispute it, my lawful (and even earthly responsible) ownership and carrying of weapons does have the capacity to inhibit the work of the Gospel.
If a man comes into my house tonight looking to do evil to my family; rest assured that he will be met by the muzzle of my 12 guage; not the sound of my preaching. At the same time, if I go to the homeless shelter to preach next weekend, my gun will stay home. I genuinely think that's a legitimate stance without falling into hypocrisy.