Patent Golden Lord Launcher

Item ID 840001 Name Patent Golden Lord Launcher
A grenade launcher made of gold used by those who have reached the level of gun master who can handle all guns skillfully.
Through the strength and grip of the barrel, it began to show its natural strength.
It seems to resonate with the Great Hero's Boots.
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For each 2 Refine Levels:
Increases Ranged Physical Damage by 3%.
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For each 3 Refine Levels:
ATK +20
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Refine Level +7:
Increases damage of Dragon Tail by 15%.
Decreases Dragon Tail skill cooldown by 1 second.
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Refine Level +9:
Increases damage of Dragon Tail by additional 20%.
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Refine Level +11:
Increases Physical Damage against enemies of against enemies of all elements by 15%.
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When equipped with Great Hero's Boots:
DEX +10
Increases Ranged Physical Damage by 5%.
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Type: Grenade Launcher
Attack: 350
Weight: 240
Weapon Level: 4
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Requirement:
Base Level 150
Rebellion
Weapon Level 4 Identifier Up_Golden_L_Launcher
Attack 350 Type Weapon - Grenade Launcher
MATK 0 Equip Locations Two-Handed
Defense 0 Equippable Jobs Gunslinger, Rebellion
Range 9 Equip Gender Both (Male and Female)
Slots 2 Equip Upper None
Weight 240 Min Equip Level 150
NPC Buy 20 Max Equip Level None
NPC Sell 10 Refineable Yes
Credit Price None Trade restriction None
Item Script 
.@r = getrefine();
bonus bLongAtkRate,3*(.@r/2);
bonus bBaseAtk,20*(.@r/3);
if (.@r>=7) {
   bonus2 bSkillAtk,"RL_D_TAIL",15;
   bonus2 bSkillCooldown,"RL_D_TAIL",-1000;
}
if (.@r>=9) {
   bonus2 bSkillAtk,"RL_D_TAIL",20;
}
if (.@r>=11) {
   bonus2 bAddEle,Ele_All,15;
}

Set Script
Great Hero Boots
Patent Golden Lord Launcher 
bonus bDex,10;
bonus bLongAtkRate,5;
Unknown Hero Potential Ring
Patent Golden Lord Launcher 
bonus2 bSkillCooldown,"RL_D_TAIL",-1500;
if (getequiprefinerycnt(EQI_HAND_R)>=11)
   bonus2 bSkillAtk,"RL_D_TAIL",(readparam(bDex)/3);
Ring of Unknown Hero (Rebellion)
Patent Golden Lord Launcher 
bonus2 bAddRace,RC_All,8;
if (getequiprefinerycnt(EQI_HAND_R)>=11)
   bonus2 bSkillAtk,"RL_D_TAIL",(readparam(bAgi)+readparam(bDex))/12;
[Not For Sale] Ring of Unknown Hero (Rebellion)
Patent Golden Lord Launcher 
bonus2 bAddRace,RC_All,8;
if (getequiprefinerycnt(EQI_HAND_R)>=11)
   bonus2 bSkillAtk,"RL_D_TAIL",(readparam(bAgi)+readparam(bDex))/12;