Crossbow - Sniper Replacement?

Yes, garrysmod.org has a sniper rifle replacement for the old crossbow that uses the beta sniper model, but for some reason it’s not very… Cooperative, in working right. Probably because it was made for HL2DM, not Garry’s Mod.

While a sniper rifle replacement for the crossbow would be odd (since it fires visible projectiles that remain after being fired), does anyone know of a better replacement other than the staplers for the crossbow?

Could replace the bolt model with an invisible one.

If there should be any xbow replacement, it should be based of off this:

Which is supposedly an electirc-powered AR-15 with a 20 nail magazine.