- This is a new unfired Black Hole Weaponry fluted 6x45 Barrel I paid 720 then add gas tube and block plus tax and shipping and it was a 4 month wait as it is a custom made barrel this is basically a 243 caliber that you can have in an AR 15 uses same bolt and mags as 556 ballistics are fantastic on this caliber I will ship for $15 great deal for someone this is only for the barrel as I’ve sold the upper MOA or better
