I bought a mossberg 500 a couple a days ago brand new its really oily and greasy i dont mind it being oily or greasy but should i clean it before shooting it? Also when i pump it back slowly it sounds really gritty / grindy and it dosent sound smooth when i pump it slowly is this normal? should i lube it up? When i pump it regularly i dont here it at all theres not enough time to hear the gritty grinding sound, also the the pump forgrip is very wobbly when moved side to side its not solid and when i removed the barrel i looked at the foregrip and there are pins in there that look really flimsy should i replace this forgrip with a houge overmold forgrip? Im proud of my mossy and i know it will last a very long time these are just concerns since i will keep this shotgun with me and maybe pas it down to my kids one day should i be concerned?