A Marine’s defiant response to California Sen. Dianne Feinstein’s proposal to tighten gun control in the wake of the Newtown school shooting has gone viral on the Internet.

An open letter from U.S. Marine Cpl. Joshua Brown, first posted on CNN last week, is trending on Facebook and Twitter and creating buzz on both left-leaning and conservative websites — from the Huffington Post to The Blaze.

SEE RELATED:

The letter, titled “No ma’am” is addressed directly to the California Democrat: