Code:
format gui slot 21 of {_p} with arrow named "&6&lLazzer Rounds" with lore "Items &c&lNeeded&7" and "&625 &6&lMetal Frags" and "&65 &6&lExplosives" to run:
if players's inventory contains 25 iron ingot named "&6&lMetal Frags" and 5 clay named "&6&lExplosives":
remove 25 iron ingot named "&6&lMetal Frags" and 5 clay named "&6&lExplosives" from player's inventory
add 5 arrow named "&6&lLazzer Rounds" to player's inventory
message "&4&lCrafting"
[doublepost=1548910152][/doublepost]fix by not using clay