I'm starting to practice some krav maga on my own and I'm considering a training gun to add to my practice. In the training DVD's, they recommend the ASP red guns for training. Someone I practice TKD with likes the blueguns for training and says that they are actual weight of the live weapon. I notice that ads for the ASP red guns say "lightweight".

Does anyone have experience with either of these training aids? What are your preferences/recommendations?