Close-range gun aiming now solves from the mounted gun mouth

In Shattered Rift, close-range gun aiming has been repaired by solving from the actual mounted gun mouth rather than just the pivot. In a controlled test at about 14 m, the shared aiming error fell from 1.236 degrees to 0.000333 degrees, and two projectile contacts reduced a target from 12 HP to 10 HP. One actor was placed once with its physics frozen for the test. The 9.5-second native clip is 1080p/60 output, not proof of sustained 60 FPS on hardware. Moving charge footage and NPC integration remain under review.