No, there is no distinguishable difference between the capabilities of a Sig Sauer MCX and an AR-15. Both of these machines are incredibly powerful rifles, capable of causing extreme amounts of harm. Though they are logically two different guns, there is a larger problem being avoided when the debate is centered around things as irrelevant as the difference between two rifles, rather than the problem there is with these rifles being accessible to civilians.
Calling these weapons the same because they both are chambered with the same diminutive .223 round is like saying a Toyota Prius and a Lamborghini are the same because they both run on gasoline. The only thing they both have in common is the need for a human being to operate them. In both the case of the car and the rifle, the user determines use for malice or recreation
Despite both guns being considered "assault weapons," there is a difference between the Sig Sauer MCX and AR-15. The Sig Sauer MCX is considered to be an automatic weapon, meaning that you don't have to pull the trigger again in order to fire. The AR-15 is a semi-automatic weapon that has to be pulled again and again.
The Sig Sauer MCX that Mateen bought was a .223 (5.56mm) semi-automatic rifle: stress on semi-automatic. Can fire once per finger pull.
The majority of AR-15s sold in the US are also .223 caliber semi-automatic.
Where these weapons get their bad reputation from the Left is the "ugly gun" connotation; they aren't as pretty as say a Remington 750 Woodsman or a Ruger All-weather Ranch Rifle, both semi-automatic
rifles. The Ruger can also be configured to fire the 5.56 round.
If the next mass murderer uses one of these weapons, along with a bunch of spare magazines for fast reloading, would anti-firearms types launch a campaign to ban these?
The Sig Sauer MCX and the AR-!5 are both semi-automatic rifles with the only differences being manufacturer specific details. Both rifles fire the .223 or 5.56 nato round, but can also come in a variety of other calibers and capacities. Neither weapon is fully automatic, firing only one round per trigger pull, although both weapons do have the capability of being made fully automatic providing the proper licences and federal background checks are obtained.
No, there is no difference between the Sig Sauer MCX and an AR-15. Both have been used in terrorist attacks, so both have the potential for mass murder. These guns in particular should be regulating by the United States government to protect innocent citizens from future attacks like the hundreds occurring in 2016 alone.