CAA MCK Micro Conversion Kit Chassis for Glock mid and full frame pistols Gen 3-5 in 9mm, 40, or 357Sig, (Not 45 or 10mm). White polymer with side folding stabilizing brace with velcro strap. Features top picatinny rail, ambi charging handles, spare mag holder in foregrip area, side accessory rails, aluminum barrel shroud, and place for flashlight attachment (sold separately.) Does not include sights, thumbrest, gun, or mag. Latest Gen 4 MicroRoni MCK model. Not NFA, and no FFL required.