We have a few of these in stock and ready to go! These are standard forged aluminum (not polymer) multi cal lower receivers that already have the mil-spec lower parts kits installed (with Gen2 stainless steel hammer/trigger groups) at the factory (still need a buffer system). They also come standard with an AMBI SAFETY!We sell full carbine, rifle, and pistol buffer kits starting at $22.99 as well! Get that build started today!