22 Nosler is one of the fastest, flattest shooting caliber available in a AR15 rifle caliber today. Our 22 Nosler upper feature a 18″ Match 1:8 twist barrel to get you down range. Starting with an Aero Precision upper each receiver is hand lapped for the best fitment. The 15″ mlok hand guard from out partner at Black Rifle depot fits perfectly with this build and covers the rifle length system perfectly. Top with or favorite 1776 brake from Helius Tactical and includes MPI Nitride bolt barrier group (BCG) and standard charging handle.