diff --git a/src/game/chr/chraicommands.c b/src/game/chr/chraicommands.c
index 809566613..06f49ef5d 100644
--- a/src/game/chr/chraicommands.c
+++ b/src/game/chr/chraicommands.c
@@ -14897,6 +14897,25 @@ glabel ai0172
 /*  f05cb2c:	00001025 */ 	or	$v0,$zero,$zero
 );
 
+// Mismatch because some stores/loads to SP is in the opposite order
+//bool ai0172(void)
+//{
+//	u8 *cmd = g_Vars.ailist + g_Vars.aioffset;
+//	struct position *pos = g_Vars.chrdata->gungroundpos;
+//	g_Vars.chrdata->gungroundpos = NULL;
+//
+//	if (pos && pos->unk04 && pos->unk18 == 0 && pos->unk00 == 4) {
+//		func0f065c44(pos);
+//		func0f0605c4(pos);
+//		func0f060300(pos);
+//		func0f08ae54(pos->unk04, g_Vars.chrdata);
+//	}
+//
+//	g_Vars.aioffset = chraiGoToLabel(g_Vars.ailist, g_Vars.aioffset, cmd[3]);
+//
+//	return false;
+//}
+
 /**
  * @cmd 0173
  */
diff --git a/src/include/types.h b/src/include/types.h
index 14745515a..6179b28bd 100644
--- a/src/include/types.h
+++ b/src/include/types.h
@@ -11,18 +11,44 @@ struct coord {
 	float z;
 };
 
+struct position04 {
+	/*0x00*/ u32 unk00;
+	/*0x04*/ u32 unk04;
+	/*0x08*/ u32 unk08;
+	/*0x0c*/ u32 unk0c;
+	/*0x10*/ u32 unk10;
+	/*0x14*/ u32 unk14;
+	/*0x18*/ u32 unk18;
+	/*0x1c*/ u32 unk1c;
+	/*0x20*/ u32 unk20;
+	/*0x24*/ u32 unk24;
+	/*0x28*/ u32 unk28;
+	/*0x2c*/ u32 unk2c;
+	/*0x30*/ u32 unk30;
+	/*0x34*/ u32 unk34;
+	/*0x38*/ u32 unk38;
+	/*0x3c*/ u32 unk3c;
+	/*0x40*/ u32 flags;
+};
+
 struct position {
 	u8 unk00;
 	u8 flags;
 	u16 unk02;
-	u32 unk04;
+	struct position04 *unk04;
 	struct coord coord;
 	u32 unk14;
-	u32 unk18;
+	u32 unk18; // related to gun recovery
 	u32 unk1c;
 	u32 unk20;
 	u32 unk24;
 	s16 room;
+	u32 unk2c;
+	u32 unk30;
+	u32 unk34;
+	u32 unk38;
+	u32 unk3c;
+	u32 unk40;
 };
 
 struct bitfielddata {