diff --git a/game/reconstructed/mech4.cpp b/game/reconstructed/mech4.cpp
index 91df319..32498bd 100644
--- a/game/reconstructed/mech4.cpp
+++ b/game/reconstructed/mech4.cpp
@@ -790,8 +790,26 @@ void
 	EntitySegment *seg = m->GetSegment(segIndex);		// owner+0x300 table, GetNth(index)
 	if (seg != 0)
 	{
-		AffineMatrix mw;
-		mw.Multiply(seg->GetSegmentToEntity(), m->localToWorld);	// segment -> world (== mech4 gun-port path)
+		// #141 -- THE BINARY GOES THROUGH FUN_00424da8, AND SO MUST WE.
+		// @004b9948 ends in `FUN_00424da8(owner, segment, out)`, which is
+		// JointedMover::GetSegmentToWorld instruction-for-instruction:
+		//     iVar1 = FUN_00417ab4(param_1 + 0x31c);   // GetJointSubsystem()
+		//     if (*(int *)(iVar1 + 0xfc) != 0) {       // AreJointsModified()
+		//         ...walk owner+0x300 setting seg+0xc = 1...   // ModifySegment()
+		//         *(int *)(iVar1 + 0xfc) = 0;          // ModifyJoints(False)
+		//     }
+		//     FUN_0040b104(out, FUN_004244dc(seg), owner+0xd0);  // x localToWorld
+		// So in the 1995 image EVERY muzzle query performs the joints->segments
+		// refresh.  This port hand-composed GetSegmentToEntity() x localToWorld
+		// and skipped it -- and GetSegmentToEntity only recomputes when
+		// segmentModified is already set (SEGMENT.cpp:262), so it returned a
+		// stale cache.  On the MASTER that was invisible (the render pass
+		// refreshes the local mech every frame); on a REPLICANT nothing did, so
+		// peer muzzles sat at the BIND POSE -- the missile launched along the
+		// leg facing (#141).  Use the engine accessor; do NOT force the dirty
+		// flag, the binary does not.
+		LinearMatrix mw;
+		m->GetSegmentToWorld(*seg, &mw);
 		out = mw;										// Point3D = matrix W_Axis translation
 	}
 	else
@@ -1534,14 +1552,14 @@ void
 					// GetSegmentToWorld mark every segment dirty so the whole
 					// chain re-derives from the CURRENT joint angles.  Costs one
 					// segment-table walk per salvo.
-					// MEASURED: this alone takes the replicant from 0% to 64% of
-					// salvos carrying the twist.  Also forcing every per-joint
-					// `jointModified` flag (GetSegmentToParent's own gate,
-					// SEGMENT.cpp:196) was tried and moved the number by NOTHING
-					// -- 64% either way -- so the residual 36% is a different
-					// cause, not per-joint cache staleness.  Kept the cheap form.
-					if (JointSubsystem *jsf = sm->GetJointSubsystem())
-						jsf->ModifyJoints(True);
+					// NO forced dirty flag here.  An earlier pass set
+					// ModifyJoints(True) before this read; it bought 64% of
+					// salvos but it is NOT what the binary does -- @00424da8
+					// tests AreJointsModified() and never sets it.  The authentic
+					// refresh happens in the MUZZLE query (GetMuzzlePoint ->
+					// @00424da8), which the launcher calls just above this, so by
+					// the time we compose the launch frame the segment cache is
+					// already current.  See BTResolveWeaponMuzzle.
 					LinearMatrix mw;
 					sm->GetSegmentToWorld(*seg, &mw);
 					mw.GetFromAxis(X_Axis, &ax);