diff --git a/1.3/Defs/ReserchDefs/Reserch_ProjectDefs.xml b/1.3/Defs/ReserchDefs/Reserch_ProjectDefs.xml
index 763f336..2876f06 100644
--- a/1.3/Defs/ReserchDefs/Reserch_ProjectDefs.xml
+++ b/1.3/Defs/ReserchDefs/Reserch_ProjectDefs.xml
@@ -237,6 +237,21 @@
     <researchViewY>3.5</researchViewY>
   </ResearchProjectDef>
 
+  <ResearchProjectDef>
+    <defName>PNRP_Railgun</defName>
+    <label>PnL Railgun</label>
+    <description>Research how to craft basic PnL Railgun.</description>
+    <tab>PN_technology</tab>
+    <baseCost>2000</baseCost>
+    <techLevel>Spacer</techLevel>
+    <prerequisites>
+      <li>PNRP_AutoArtillery</li>
+      <li>PNRP_RoyalWeapons</li>
+    </prerequisites>
+    <researchViewX>5.0</researchViewX>
+    <researchViewY>4.2</researchViewY>
+  </ResearchProjectDef>
+
   <!--==================================== 동면관 ====================================-->
   <!--<ResearchProjectDef>
     <defName>PNRP_CryptosleepCasket</defName>
diff --git a/1.3/Defs/ThingDef/ThingDef_Security.xml b/1.3/Defs/ThingDef/ThingDef_Security.xml
index 3d8c44b..ec2d2a1 100644
--- a/1.3/Defs/ThingDef/ThingDef_Security.xml
+++ b/1.3/Defs/ThingDef/ThingDef_Security.xml
@@ -205,7 +205,7 @@
     <constructionSkillPrerequisite>5</constructionSkillPrerequisite>
     <costList>
       <Steel>150</Steel>
-      <ComponentIndustrial>6</ComponentIndustrial>
+      <ComponentSpacer>12</ComponentSpacer>
       <PN_BrainCasing>1</PN_BrainCasing>
     </costList>
     <inspectorTabs>
@@ -271,7 +271,7 @@
       <li>PlaceWorker_PreventInteractionSpotOverlap</li>
     </placeWorkers>
     <researchPrerequisites>
-      <li>PNRP_AutoArtillery</li>
+      <li>PNRP_Railgun</li>
     </researchPrerequisites>
     <uiIconPath>Things/Building/PN_Railgun_Ui</uiIconPath>
     <uiIconScale>0.9</uiIconScale>