556 Tactical has a sale going on right now for their 12″ and 15″ Evolution rail systems. These are very high quality, lightweight modular rails. They also have a cool angled cut to the front of the rail and have a large enough internal diameter to fit a KX3 or most suppressors inside. Right now you can save $12 off the 12″ model and $15 off the 15″ model. This is I believe the first time I’ve seen these go on sale so you might want to jump on it, especially since its only a 10 day sale. Links provided below.