diff --git a/AUTHORS.txt b/AUTHORS.txt
index 6b51c1990a..29a270aedf 100644
--- a/AUTHORS.txt
+++ b/AUTHORS.txt
@@ -37,6 +37,7 @@ Aleksey EpMAK Yermakov <epmak777@gmail.com>
 Alganthe <alganthe@live.fr>
 Anthariel <Contact@storm-simulation.com>
 Asgar Serran <piechottaf@web.de>
+Bamse <bamsis@gmail.com>
 Bla1337
 BlackPixxel <blackpixxel96@gmail.com>
 BlackQwar
diff --git a/optionals/compat_rhs_usf3/CfgWeapons.hpp b/optionals/compat_rhs_usf3/CfgWeapons.hpp
index 5d1eea96d3..4edcc57984 100644
--- a/optionals/compat_rhs_usf3/CfgWeapons.hpp
+++ b/optionals/compat_rhs_usf3/CfgWeapons.hpp
@@ -5,6 +5,7 @@ class CfgWeapons
     class Rifle_Base_F;
     class srifle_EBR_F;
     class launch_O_Titan_F;
+    class UGL_F;
 
     class rhs_weap_XM2010_Base_F: Rifle_Base_F {
         ACE_barrelTwist=254.0;
@@ -14,6 +15,98 @@ class CfgWeapons
     class rhs_weap_m4_Base: arifle_MX_Base_F {
         ACE_barrelTwist=177.8;
         ACE_barrelLength=368.3;
+        class M203_GL : UGL_F {
+            magazines[] = {
+                "rhs_mag_M441_HE",
+                "rhs_mag_M433_HEDP",
+                "rhs_mag_M4009",
+                "rhs_mag_m576",
+                "rhs_mag_M585_white",
+                "rhs_mag_M661_green",
+                "rhs_mag_M662_red",
+                "rhs_mag_M713_red",
+                "rhs_mag_M714_white",
+                "rhs_mag_M715_green",
+                "rhs_mag_M716_yellow",
+
+                //bis compatibility
+                "1Rnd_HE_Grenade_shell",
+                "UGL_FlareWhite_F",
+                "UGL_FlareGreen_F",
+                "UGL_FlareRed_F",
+                "UGL_FlareYellow_F",
+                "UGL_FlareCIR_F",
+                "1Rnd_Smoke_Grenade_shell",
+                "1Rnd_SmokeRed_Grenade_shell",
+                "1Rnd_SmokeGreen_Grenade_shell",
+                "1Rnd_SmokeYellow_Grenade_shell",
+                "1Rnd_SmokePurple_Grenade_shell",
+                "1Rnd_SmokeBlue_Grenade_shell",
+                "1Rnd_SmokeOrange_Grenade_shell",
+                "3Rnd_HE_Grenade_shell",
+                "3Rnd_UGL_FlareWhite_F",
+                "3Rnd_UGL_FlareGreen_F",
+                "3Rnd_UGL_FlareRed_F",
+                "3Rnd_UGL_FlareYellow_F",
+                "3Rnd_UGL_FlareCIR_F",
+                "3Rnd_Smoke_Grenade_shell",
+                "3Rnd_SmokeRed_Grenade_shell",
+                "3Rnd_SmokeGreen_Grenade_shell",
+                "3Rnd_SmokeYellow_Grenade_shell",
+                "3Rnd_SmokePurple_Grenade_shell",
+                "3Rnd_SmokeBlue_Grenade_shell",
+                "3Rnd_SmokeOrange_Grenade_shell",
+                
+                //ACE3 Compatibility
+                "ACE_HuntIR_M203"
+            };
+        };
+        class M320_GL : M203_GL {
+            magazines[] = {
+                "rhs_mag_M441_HE",
+                "rhs_mag_M433_HEDP",
+                "rhs_mag_M4009",
+                "rhs_mag_m576",
+                "rhs_mag_M585_white",
+                "rhs_mag_M661_green",
+                "rhs_mag_M662_red",
+                "rhs_mag_M713_red",
+                "rhs_mag_M714_white",
+                "rhs_mag_M715_green",
+                "rhs_mag_M716_yellow",
+
+                //bis compatibility
+                "1Rnd_HE_Grenade_shell",
+                "UGL_FlareWhite_F",
+                "UGL_FlareGreen_F",
+                "UGL_FlareRed_F",
+                "UGL_FlareYellow_F",
+                "UGL_FlareCIR_F",
+                "1Rnd_Smoke_Grenade_shell",
+                "1Rnd_SmokeRed_Grenade_shell",
+                "1Rnd_SmokeGreen_Grenade_shell",
+                "1Rnd_SmokeYellow_Grenade_shell",
+                "1Rnd_SmokePurple_Grenade_shell",
+                "1Rnd_SmokeBlue_Grenade_shell",
+                "1Rnd_SmokeOrange_Grenade_shell",
+                "3Rnd_HE_Grenade_shell",
+                "3Rnd_UGL_FlareWhite_F",
+                "3Rnd_UGL_FlareGreen_F",
+                "3Rnd_UGL_FlareRed_F",
+                "3Rnd_UGL_FlareYellow_F",
+                "3Rnd_UGL_FlareCIR_F",
+                "3Rnd_Smoke_Grenade_shell",
+                "3Rnd_SmokeRed_Grenade_shell",
+                "3Rnd_SmokeGreen_Grenade_shell",
+                "3Rnd_SmokeYellow_Grenade_shell",
+                "3Rnd_SmokePurple_Grenade_shell",
+                "3Rnd_SmokeBlue_Grenade_shell",
+                "3Rnd_SmokeOrange_Grenade_shell",
+                
+                //ACE3 Compatibility
+                "ACE_HuntIR_M203"
+            };
+        };
     };
     class rhs_weap_m4a1;
     class rhs_weap_mk18: rhs_weap_m4a1 {