can you make one for normal guns with more sparks? that'll be super cool

New muzzle flash for normal guns is included too. If you don't like how it looks, it should be safe to subscribe to a different mod with your preferred effect - just make sure it's above this one in your list so it has priority. All this mod does is change a few textures, so it should be safe to use with pretty much anything.

Does it only replace AR 2 muzzleflashes or overall weapons muzzleflashes?

this is cool also replaces the other guns muzzleflashes too

Yes, this only changes a few textures, AFAIK it should be compatible with model swap or particle mods.

does it work with the OICW mod?

very nice :)