Upgrade your lower receiver with a SOPMOD or Precision Bolt (a.k.a. BLACK SHOT BOLT) today! Used with BCM Match Grade Bolts, this kit features all SOPMOD compatible parts. If you are looking for a bolt kit that will work with your Limited or Glock Bolt (or similar), you have found it! If not, this is a great opportunity to purchase one of the many BOLO BCGs on the market (as they are also known as SOPMODS) and have BOLO SHOP feature added on one or both sides of your lower receiver. This allows for a more advanced rebuild kit, or simply an upgrade kit for one of your lower receivers that was damaged in a fire.