A panel of Pennsylvania House Democrats on Monday advanced four bills aimed at curbing gun violence, though they are unlikely to receive a vote if ultimately successful in being sent to the Republican-led Senate. A fourth proposal would ban devices that convert firearms into machine guns, like switches and bump stocks. Democrats’ one-vote House majority could derail the bills before they could be sent to the Senate, given the voting record of a comparatively conservative Democrat from Cambria County. Activists wore bright orange shirts and carried homemade anti-gun violence signs. Adam Garber, executive director of CeaseFirePA, said the reforms would be a “step forward towards a safer Pennsylvania.”“These policies are bipartisan across the commonwealth, except in this building,” Garber said.