The Best Assaulting Weapon for NC

[Sys14]

I am new to planetside, has been promoted to BR6 yesterday. And i intend to be a good infantry, but i found something not as good as i imagined.

After i got my heavy assault cert, i found NC can only get a shotgun in that pool. Compare to TR's Mini-Chain, and VS's Lasher, i think the shotgun pretty poor for our NC. I can kill nobody beyond 20m with it.

So, this is my question, what weapon should i use to do the assaulting? Punisher? it's so inaccurate. What else can i use?

Help me