Your edges are fairly sharp. You're going to want to read this to see WHY sharp hard edges are bad for your normal bakes. http://polycount.com/discussion/107196/youre-making-me-hard-making-sense-of-hard-edges-uvs-normal-maps-and-vertex-counts/p1
Your edges on your High Poly are too sharp. Soften them or you're going to have some bad distance reads from your weapon. An explanation is in this thread of why that happens. http://polycount.com/discussion/107196/youre-making-me-hard-making-sense-of-hard-edges-uvs-normal-maps-and-vertex-counts/p1