WTS 20in Busmaster Postban Heavy Barrel 1/9 twist, chrome lined with only barrel nut and front sight base with sight. Barrel has 300 rounds +/- 25 rounds through it with minor sctraches/marks. Barrel was pulled from exsisiting rifle to make it inot a carbine. Does not include gas tube, delta ring assembly or handguards. Asking $100 shi[pped to lower 48. If interested please email or pm me. Thanks.