I thought a cool thing to do with a ripper type weapon would be to have the primary fire pretty much just like in UT, where the shots bounce off walls and such at predictable angles, but then the secondary fire would have a higher rate of fire, but the saws would be much less accurate, may wobble or curve in flight, and bounce off walls at weird (random) angles, and after maybe 2 or 3 bounces, would fall to the floor and just roll around (either straight or in circles, randomly) until thier speed got low, at which point they harmlessly fall over flat and "die". If anyone stepped on a saw while it was rolling around, it would stick in them and hurt them (maybe not as much as getting shot with a saw), but a flat saw should be harmless.
Also, for the primary fire, there should be a 10% chance each time a saw hits a wall that it becomes stuck in the wall, where it stays for a little while (maybe have a slider option that determines how long they stay), and anyone who bumps the saw will take a bit of damage. This could probably be achieved by allowing the saw to remain an active projectile without moving?
BTW: If you can make the arrows stick into people, saws would be cool too, especially with the way UT2k3 makes a fountain of blood squirt out when someone gets hit. However, I also think it might be a good idea to have maybe a 30% chance that instead of sticking into someone, the saw just keeps going in the same direction (maybe a 10% chance that the saw's direction gets changed?), and maybe does a bit more damage to the person it ripped through. So with some luck, you could "rail" people with the buzzsaw.
Man, I should invent weapons for a mod... I've got so many sick and twisted ideas...