Two Massachusetts Democrats were the only representatives to refuse participation in the House's moment of silence for Las Vegas shooting victims on Tuesday night.

Rep. Katherine Clark (D-MA 5th District) and Rep. Seth Moulton (D-MA 6th District) figuratively stuck to their guns Tuesday night, staying true to the promise they made in June 2016 after the Orlando Pulse nightclub shooting left 49 killed and 58 injured.

It was after the Orlando shooting Clark promised to never participate in any more moments of silence -- or as she calls them -- "empty gestures."

The two were among several congressional representatives who walked out of the chamber on June 13, 2016, to symbolize what they say is government inaction on gun control.

As after #Orlando, I will NOT be joining my colleagues in a moment of silence on the House Floor that just becomes an excuse for inaction. — Seth Moulton (@sethmoulton) October 2, 2017

"If the LGBT community has taught us anything, it's that silence is the enemy of progress. I refuse to take part in a moment of silence by a Congress that takes part in empty gestures rather than do something - anything - that could actually prevent these horrific acts from happening," Clark wrote in an online post after the Orlando shootings.

More than a year later, Clark and Moulton refused silence again. They say the pattern of mass shootings must be answered with what Moulton refers to as "basic gun reform." He called the moment of silence "an excuse for inaction."

Moulton, an Iraq War veteran and rumored contender for the 2020 Democratic presidential nomination, directed many recent tweets at House Speaker Paul Ryan to demand debate on gun reform.

We can do something about this. Most Americans – including gun owners – support common sense action. What about you, @SpeakerRyan? https://t.co/X53zieCh7s — Seth Moulton (@sethmoulton) October 4, 2017

I’ve lost count of # of times Congress has voted to make abortion illegal, but we can’t even DEBATE basic gun reform, right @SpeakerRyan? — Seth Moulton (@sethmoulton) October 4, 2017

.@SpeakerRyan had planned a vote on a bill to deregulate firearm silencers, but it’s been pulled from the House schedule. — Seth Moulton (@sethmoulton) October 3, 2017

.@SpeakerRyan, how many Americans have to die before you do your job? Allow us to have a debate and a vote. You're letting America down. — Seth Moulton (@sethmoulton) October 2, 2017

As it often does following mass shootings, the national debate over gun control has spiked since the shooting on Sunday. The 59 deaths in Las Vegas on Sunday marked gunman Stephen Paddock's rampage as the deadliest shooting in modern U.S. history. Area hospitals saw 527 wounded people after Paddock sprayed bullets into a crowd of 22,000 concert-goers on the Las Vegas Strip.

Officials said Paddock had two "bump-stocks," legal devices that could have helped convert his legally-obtained semi-automatic firearms into automatic weapons.

Republican lawmakers, like Senate Majority Leader Mitch McConnell, said this week that any discussion of legislative solutions "is premature." Speaker Ryan said there is no plan for the House to act soon regarding a silencer bill, which would decrease the sound of gunshots.