Weapons MODs

can any one give me a quick over veiw of weapon mods? like how u get them, how u put them on, can u take them of again etc

ive looked all ova the net yt cant find a single weapon MOD guide, so any help would be appreciated,

thx

i've always gotten them from id'ing weapons and using expert salvage on them if they are salvage items. doen't happen all the time, but once in a while i'll end up with an axe grip or bow string or something.

click on the upgrade in inventory than double click on weapon you wish to apply it to

edit

take them off by salvaging the weapon and hope you get it back

doesnt do the weapon much good and you only get one upgrade back it it has two upgrades on it