The ArmaLite M-15 Law Enforcement Carbine has an M203-style, step-down barrel for Law Enforcement accessories, an A2 front sight, flattop upper receiver with MIL-STD 1913 rail providing optional sighting platforms and a 6 position collapsible stock. It's a basic M4-style carbine with a 1:7-inch, RH twist, two stage trigger, chrome moly barrel and flash hider, with an MSRP of $989.