I caught a brief segment on the local news about it. When they were mentioning the .50 BMG, they cut to a photo of a 25mm XM-109
The Globe article isn't much better.
www.boston.com/news/local/articles/2005/03/16/mass_bill_would_ban_cop_killer_guns_rifles/Mass. bill would ban 'cop killer' guns, rifles
So-called cop killer handguns and .50-caliber rifles would be included in the Massachusetts assault weapons ban under legislation filed yesterday by state Senator Jarrett T. Barrios, cochairman of the Joint Committee on Public Safety and Homeland Security.
Barrios gathered with gun control advocates at Suffolk District Attorney Daniel F. Conley's office to announce the legislation targeting a new class of high-powered weapons that they say pose a serious threat to police officers and to planes during takeoff. The bill targets the Five-seveN handgun and the .50 caliber sniper rifle, which they say
can be easily bought over the Internet and are banned in California.
''Police put their lives on the line every day to keep our streets safe, and they deserve the best protection we can give them," Barrios said. ''They are our first responders. They need to be safe."
Known on the street as the cop killer, the Five-seveN is easily concealable and is designed to shoot ammunition that can pierce 48 layers of Kevlar, the material in bulletproof vests.
The .50-caliber rifle can accurately shoot a target up to 2,000 yards away and can potentially shoot down commercial airplanes during takeoff, supporters of the bill said. The rifle is not covered by the state assault weapons ban.
Gun dealers and collectors have disputed assertions that the .50-caliber rifles are a threat to public safety, pointing out that they cost more than $6,000, are very heavy, and are hard to use for rapid-fire shooting.