Welding and Metalworking - Welding 3 brass tubes?

Ok hi everyone this is what im doing I am goin to get my paintball marker powder coated and my friend tells me they will bake the paintball marker in a oven at 375f. My paintball marker is just 3 plan 10inch long brass tubes on top of each other and they have been sodered to each other with a cheap soder that is not silver soder that will most likely melt and the paintball marker body will fall apart while bakeing at 375f. what im wondering is what do u think is the easyest way to weld the 3 tubes together that will not ruin the brass tubes because they are for shooting paintball throw ? I was thinking I could braze the tubes but that takes high heat and im affraid im goin to melt or ruin the body tubes do u think my next best option is to get someone to silver soder the tubes together or do u have any other options? Thank u all for any help u can give me have a great day!

Plenty of solders would work for what you need. No need to get into brazing for that low an oven temp.

You are right, no way of knowing what you have, I'd say have it baked before painting and see if its a problem. You could also go to most any electronics repair shop. They most likely will have a nice temp controlled soldering station that they can check the melting point of your solder joints.

Heres a ref I found, most were way to technical for this simple a question.

http://www.whittemoredurgin.com/7800solderq.html