I am assuming you are using a tripod for these shots, if not, I would start there, as the rest of the suggestions require one.
Add a little more depth of field to your shots by using a high F-Stop, which will give you a better depth of field so that the whole gun is in focus. You can use calculators like http://www.dofmaster.com/dofjs.html to see how much DOF you will have with a given lens at a given distance.
Your lighting is pleasant, but you need a longer exposure... Set your camera to aperture priority mode, and select an ISO of 400 or less (T2i/T3i gets noisy past 800 in my opinion). When using a tripod, you can give yourself several seconds to half a minute exposure, depending on what your light meter says.... I would suggest bracketing the shot (by shooting 1.5 stops higher and 1.5 stops lower)... this will give you a few shots to play with, and material to make a HDR / Fusion shot (go light on the cooking when you do this -- overcooked images look funky).
Experiment with white poster board to reflect light into a shot ... the reverse can be done with black poster board.
Clean the hell out of your background - 5 min ahead of time, will save 5 min per shot in cleaning things up.
If you don't have a copy of Adobe Lightroom, and plan on shooting a lot, then I would get a copy... There are a lot of image adjusting options as well as cleanup tools available.
As a T2i and 6D owner, I can also recommend the following site - http://www.t2iforum.com as a good resource for additional information.