been determined to be appropriate, review of whether acceptance of responsibility applied would have been unnecessary.
V.
Guideline § 2Dl.l(b)(l) allows for a 2-level increase in the base offense level “[i]f a firearm or other dangerous weapon was possessed during commission of the offense.” Application Note 3 of the Commentary to this section states that “[t]he enhancement for weapon possession reflects the increased danger of violence when drug traffickers possess weapons. The adjustment should be applied if the weapon was present, unless it is clearly improbable that the weapon was connected with the offense.”
Jackson contends that the court erred in enhancing his base offense level because he did not physically possess the weapon which was discovered under White’s seat in the vehicle. In support of this argument, Jackson points out that he entered a guilty plea to aiding and abetting White in the drug offense, but that he did not plead guilty to conspiracy. Therefore, he contends that the government was forced to prove that he independently possessed the weapon.
Guideline § 1B1.3 establishes the conduct that is relevant for determination of the applicable guideline range. Included in the relevant factors are:
all acts and omissions committed or aided and abetted by the defendant, or for which the defendant would be otherwise accountable, that occurred during the commission of the offense of conviction, in preparation for that offense, or in the course of attempting to avoid detection or responsibility for that offense, or that otherwise were in furtherance of that offense.
Guideline § lB1.3(a)(l).
The district court did not err in applying Guideline § 2Dl.l(b)(l) and enhancing Jackson’s base offense level for the presence of the weapon. The weapon was present, Jackson and White were acting in concert, it was not improbable that the weapon was connected with the offense, and, under the circumstances of the case, it was fair to say that it was reasonably foreseeable to Jackson that his co-participant was in possession of a firearm. Therefore, under Guideline § lB1.3(a)(l), Jackson is “otherwise accountable” for the weapon.
The facts surrounding the apprehension of Defendants are important. Jackson arrived at the train station after midnight, exited the train, greeted White and rode away with him. The pistol under the driver’s seat was readily accessible to both. And, as Jackson conceded, he knew White personally and had been involved in at least one previous similar transaction with him. Finally, it is not unreasonable to recognize that weapons have become “ ‘tools of the trade’ ” in illegal narcotics operations. United States v. Hinds, 856 F.2d 438, 443 (1st Cir.1988) (quoting United States v. Cresta, 825 F.2d 538, 554 (1st Cir.1987), cert. denied, — U.S. -, 108 S.Ct. 2033, 100 L.Ed.2d 618 (1988)). Therefore, although Jackson’s guilty plea was based on an aiding and abetting charge and not on a conspiracy charge, the district court did not err in considering the possession of the weapon for sentencing purposes.
VI.
Guideline § 3B1.2(b) provides that the base offense level may be reduced by 2 levels if the defendant is found to be a “minor participant” in the criminal activity. Jackson contends that he was entitled to this reduction. In support of this assertion, he points out that the investigating officer referred to him as merely a “messenger,” while White was termed the “manager.” Jackson argues that in light of the creation of a “hierarchy of culpability,” he should have been given a 2-level reduction.
In United States v. Daughtrey, 874 F.2d 213, this court set forth the standard of review for questions involving application of the minimal and minor participant reductions. Where the question involves the “correctness of the district court’s determination that [the defendant] was neither a