The META TACTICAL APEX-Series Carbine Conversion Kit is the world’s first pistol-to-rifle bullpup style conversion kit. Unlike the other “conversion” kits on the market, the Apex chassis combined with our drop-in 16” barrel will ACTUALLY CONVERT your pistol to a bullpup rifle. Use your existing pistol as an actual Pistol-Caliber-Carbine (PCC) without worrying about brace issues and SBR registrations.