diff --git a/game/reconstructed/mech4.cpp b/game/reconstructed/mech4.cpp
index 32498bd..ae60ad5 100644
--- a/game/reconstructed/mech4.cpp
+++ b/game/reconstructed/mech4.cpp
@@ -1062,8 +1062,13 @@ int
 		{
 			if (seg->GetIndex() == seg_index)
 			{
-				AffineMatrix mw;
-				mw.Multiply(seg->GetSegmentToEntity(), m->localToWorld);
+				// #141 sweep: go through the engine accessor, which is the
+				// binary's FUN_00424da8 (the joints->segments refresh).  A hand
+				// composed GetSegmentToEntity() x localToWorld reads a STALE
+				// cache on any mech whose segments were not refreshed this frame
+				// -- i.e. every REPLICANT.  See BTResolveWeaponMuzzle.
+				LinearMatrix mw;
+				m->GetSegmentToWorld(*seg, &mw);
 				p = mw;									// Point3D = matrix translation
 				break;
 			}
@@ -2144,8 +2149,11 @@ void
 		{
 			if (seg->GetIndex() == segment_index)
 			{
-				AffineMatrix mw;
-				mw.Multiply(seg->GetSegmentToEntity(), mech->localToWorld);
+				// #141 sweep: engine accessor (== the binary's FUN_00424da8),
+				// not a hand-composed product -- otherwise a peer's damage
+				// effect anchors to the BIND-POSE segment.
+				LinearMatrix mw;
+				mech->GetSegmentToWorld(*seg, &mw);
 				fxPos = mw;								// Point3D = matrix translation
 				break;
 			}
@@ -8912,9 +8920,12 @@ void
 				}
 				if (s_portCache[energyOrdinal] != 0)
 				{
-					AffineMatrix mw;
-					mw.Multiply(s_portCache[energyOrdinal]->GetSegmentToEntity(),
-						localToWorld);
+					// #141 sweep: engine accessor (== the binary's FUN_00424da8).
+					// This is the BEAM muzzle -- the same stale-cache exposure the
+					// missile launch had, so a peer's beam would also originate
+					// from the bind-pose gun port instead of the twisted torso.
+					LinearMatrix mw;
+					GetSegmentToWorld(*s_portCache[energyOrdinal], &mw);
 					mz = mw;					// Point3D = matrix translation
 				}
 			}