to determining whether the enhancement is warranted, but the government is not required to make a prima facie showing that the weapon was capable of being fired while it was in the defendant's "possession” to justify the enhancement. When one looks down the business end of the barrel of a shotgun, one naturally assumes it is both loaded and operable. 10 . 21 U.S.C. § 848(a) provides for a mandatory minimum of 20 years and the sentence "may be up to life imprisonment’' for persons convicted of "engaging in a continuing criminal enterprise.” 11 . Frazier's and Thomas's presenten ce reports indicate that both have a prior drug felony conviction. Therefore, the maximum sentence they could have received without violating Apprendi was 30 years. See Arias, 252 F.3d at 979 (8th Cir.2001) (<HOLDING>). 12 . Defendants argue the jury’s verdict was
recognizing that defendant with prior conviction may be sentenced to 30year sentence under  841b1c without offending apprendi holding that apprendi does not apply where the defendant was sentenced to less than the statutory maximum holding that the trial court may not retain jurisdiction over a sentence when the defendant is sentenced under the guidelines holding that a juvenile adjudication may be used as a prior conviction for apprendi purposes holding that any apprendi error is harmless if the defendant is sentenced to less than the statutory maximum