The group, also known as MDA, was created after the Sandy Hook Elementary shooting.
The moms have formed chapters in many states to lobby lawmakers and restuarant owners for stricter gun rules.
The Oklahoma group was out collecting signatures in Tulsa on Saturday.
A post on the MDA-OK Facebook page says, “Tulsa moms (and a Tulsa granddad) went to the Cherry Street Farmer's market to sign people up for the Gun Sense Voter pledge. The Oklahoma Open Carry Association got wind of our event and showed up as well."
David Risselada, with The Oklahoma Open Carry Association, says, “The anti-gun group requested a booth at the local farmers market and was denied, so they set up shop right on the outskirts of the downtown Tulsa event in order to gather signatures.”
The moms say nine armed men confronted them. The clip below is audio of the exchange.
“If they think we will be intimidated, they are sadly mistaken. We had a great day signing up lots of new gun sense voters and we won't quit until we have better gun laws. Our votes will always be more powerful than their guns.
The signature drive then moved to a Tulsa Chipotle.
OKOCA members showed up before the store opened. MDA members ended up there too.
Risselada says, “The manager refused to kick out OKOCA and even gave them free drinks. MDA activists then proceeded to take pictures of the gun owners and attempted to portray them as intimidating and threatening. The management wasn't having any of it; he threw Moms Demand Action out of his store!”
The manager told Risselada he didn’t want people treating paying customers rudely in his store.
Click here to read the full post from OKOCA.