so i have a bh gadgeteer in my group and he wants me to make some awesome attachments for them. see they took the base instead of a ship. i was going to see if everyone could help me with some ideas for good ones

;)How about starting by stripping out everything besides the stock and replacing them with blaster components?

thats a good one ive thought of some basics like extended mags and cylinders a silencer a bayonet style mod a scope or two and maybe add a couple more unique slugthrowers. donw this for my other players think its only fair players

If they took a base of operations that they may need to defend, you could consider adding gunnery skill slugthrowers, like mounted miniguns, to the base?

Specialty ammo is an easy way to add effects to a slugthrower.

...and a house rule that ups the Hard Points of the slugthrowers since you can't do much with attachments as is.

p. 41 in EtU gives an example of what I am referring to when it lays out the Detonator Rounds you can buy for the model 38. It's basically an upgrade you purchase and unless you have an 'out of ammo' result happen on a die roll you never need to buy them again. Without going into the specifics of those rounds they swap out some of the effects of the Model 38 for others. Same sort of idea could be applied to any effect really though and you need not go with the 'out of ammo' issue if you don't like.