The FX-9 carbine (Freedom Xtreme-9mm Carbine) is crafted with controls that AR-15 users will find instinctual. Not only does it accommodate AR-15 stocks and buffer tube assemblies, but it also supports most free-float AR-15 rail assemblies. Made from billet material, the FX-9 comes with an anodized type III aluminum and full hard nitride steel components. Including features like the barrel, bolt, ejector, last round hold open, feed ramp, and extractor, the carbine provides extended wear properties and excellent corrosion resistance. What sets the FX-9 apart is its compact and lightweight design. Both the upper and lower receiver are more than 1 inch shorter than those found in a standard AR-15. When it comes to the magazine, the FX-9 uses standard, double-stack Glock-style 9mm magazines and is compatible with 9mm-approved 1/2\"x 28 tpi muzzle devices/suppressors, as well as KNS precision AR-15 trigger pins. Additional features include a 13\" free-floating M-Lok rail with a 3\" Picatinny rail section, a 6-position collapsing stock, a rear charging handle, and it also includes a 33-round magazine.