Mr. Justice Brennan
delivered the opinion of the Court.
The punishment for bank robbery of a fine of not more than $5,000 and imprisonment for not more than 20 years, or both, 18 U. S. C. § 2113 (a), may be enhanced to a fine of not more than $10,000 and imprisonment for not more than 25 years, or both, when the robbery is committed “by the use of a dangerous weapon or device,” 18 U. S. C. 12113(d).1 Another statute, 18 U. S. C. § 924 (c), provides that whoever “uses a [8]*8firearm to commit any felony for which he may be prosecuted in a court of the United States . . . shall, in addition to the punishment provided for the commission of such felony, be sentenced to a term of imprisonment for not less than one year nor more than ten years,” and “[i]n the case of his second or subsequent conviction under this subsection,” to imprisonment for not less than 2 nor more than 25 years; “nor shall the term of imprisonment imposed under this subsection run concurrently with any term of imprisonment imposed for the commission of such felony.” 2 Petitioners were convicted of two separate bank robberies committed with firearms. The question for decision is whether §§ 2113(d) and 924 (c) should be construed as intended by Congress to authorize, in the case of a bank robbery committed with firearms, not only the imposition of the increased penalty under § 2113 (d), but also the imposition of an additional consecutive penalty under § 924 (c).
On September 8, 1975, petitioners, using handguns to intimidate the bank’s employees, robbed some $40,000 from the East End Branch of the Commercial Bank of Middlesboro, [9]*9Ky. App. 20. Less than two months later, on November 4, 1975, petitioners returned to Middlesboro and this time, again using handguns, robbed the West End Branch of the Commercial Bank of about the same amount.
Petitioners received a separate jury trial for each robbery. After the trial for the first robbery, they were convicted of both aggravated bank robbery, in violation of 18 U. S. C. §§ 2113 (a) and (d), and of using firearms to commit the robbery, in violation of 18 U. S. C. § 924 (c). They were sentenced to consecutive terms of 25 years’ imprisonment on the robbery count and 10 years’ imprisonment on the firearms count. After the trial for the second robbery, petitioners were again convicted of one count of aggravated bank robbery in violation of §§2113 (a) and (d) and of one count of using firearms to commit the crime in violation of § 924 (c); again each received a 25-year sentence for the robbery and a 10-year sentence for the firearms count, the sentences to run consecutively to each other and to the sentences previously imposed.
During the sentencing proceedings following each conviction, counsel for petitioners argued that the imposition of cumulative penalties for the two crimes was impermissible because the § 2113 (d) charge merged with the firearms offense for purposes of sentencing. The District Court disagreed, holding that “the statutes and the legislative history indicat [e] an intention [by § 924(c)] to impose an additional punishment.” App. 17. The Court of Appeals for the Sixth Circuit affirmed without a published opinion, 542 F. 2d 1177 (1976). We granted certiorari, 430 U. S. 964 (1977), to resolve an apparent conflict between the decision below and the decision of the Court of Appeals for the Eighth Circuit in United States v. Eagle, 539 F. 2d 1166 (1976).3 We reverse.
[10]*10II
Quite clearly, §§ 924 (c) and 2113 (d) are addressed to the same concern and designed to combat the same problem: the use of dangerous weapons — most particularly firearms — to commit federal felonies.4 Although we agree with the Court of Appeals that § 924 (c) creates an offense distinct from the underlying federal felony, United States v. Ramirez, 482 F. 2d 807 (CA2 1973); United States v. Sudduth, 457 F. 2d 1198 (CA1 1972), we believe that this is the beginning and not the end of the analysis necessary to answer the question presented for decision.
[11]*11In Blockburger v. United States, 284 U. S. 299 (1932), this Court set out the test for determining “whether two offenses are sufficiently distinguishable to permit the imposition of cumulative punishment.” Brown v. Ohio, 432 U. S. 161, 166 (1977). We held that “[t]he applicable rule is that where the same act or transaction constitutes a violation of two distinct statutory provisions, the test to be applied to determine whether there are two offenses or only one, is whether each provision requires proof of a fact which the other does not.” Blockburger v. United States, supra, at 304. See also Brown v. Ohio, supra, at 166; Ianelli v. United States, 420 U. S. 770 (1975); Gore v. United States, 357 U. S. 386 (1958). The Blockburger test has its primary relevance in the double jeopardy context, where it is a guide for determining when two separately defined crimes constitute the “same offense” for double jeopardy purposes. Brown v. Ohio, supra.5
Cases in which the Government is able to prove violations of two separate criminal statutes with precisely the same factual showing, as here, raise the prospect of double jeopardy and the possible need to evaluate the statutes in light of the Blockburger test. That test, the Government argues, is satisfied in this litigation.6 We need not reach the issue. Before an [12]*12examination is made to determine whether cumulative punishments for the two offenses are constitutionally permissible, it is necessary, following our practice of avoiding constitutional decisions where possible, to determine whether Congress intended to subject the defendant to multiple penalties for the single criminal transaction in which he engaged. Jeffers v. United States, 432 U. S. 137, 155 (1977). Indeed, the Government concedes that “there remains at least a possibility that Congress, although constitutionally free to impose additional penalties for violation of 18 U. S. C. § 924 (c) in a case like the present one, has otherwise disclosed its intention not to do so.” Brief for United States 11.
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Mr. Justice Brennan
delivered the opinion of the Court.
The punishment for bank robbery of a fine of not more than $5,000 and imprisonment for not more than 20 years, or both, 18 U. S. C. § 2113 (a), may be enhanced to a fine of not more than $10,000 and imprisonment for not more than 25 years, or both, when the robbery is committed “by the use of a dangerous weapon or device,” 18 U. S. C. 12113(d).1 Another statute, 18 U. S. C. § 924 (c), provides that whoever “uses a [8]*8firearm to commit any felony for which he may be prosecuted in a court of the United States . . . shall, in addition to the punishment provided for the commission of such felony, be sentenced to a term of imprisonment for not less than one year nor more than ten years,” and “[i]n the case of his second or subsequent conviction under this subsection,” to imprisonment for not less than 2 nor more than 25 years; “nor shall the term of imprisonment imposed under this subsection run concurrently with any term of imprisonment imposed for the commission of such felony.” 2 Petitioners were convicted of two separate bank robberies committed with firearms. The question for decision is whether §§ 2113(d) and 924 (c) should be construed as intended by Congress to authorize, in the case of a bank robbery committed with firearms, not only the imposition of the increased penalty under § 2113 (d), but also the imposition of an additional consecutive penalty under § 924 (c).
On September 8, 1975, petitioners, using handguns to intimidate the bank’s employees, robbed some $40,000 from the East End Branch of the Commercial Bank of Middlesboro, [9]*9Ky. App. 20. Less than two months later, on November 4, 1975, petitioners returned to Middlesboro and this time, again using handguns, robbed the West End Branch of the Commercial Bank of about the same amount.
Petitioners received a separate jury trial for each robbery. After the trial for the first robbery, they were convicted of both aggravated bank robbery, in violation of 18 U. S. C. §§ 2113 (a) and (d), and of using firearms to commit the robbery, in violation of 18 U. S. C. § 924 (c). They were sentenced to consecutive terms of 25 years’ imprisonment on the robbery count and 10 years’ imprisonment on the firearms count. After the trial for the second robbery, petitioners were again convicted of one count of aggravated bank robbery in violation of §§2113 (a) and (d) and of one count of using firearms to commit the crime in violation of § 924 (c); again each received a 25-year sentence for the robbery and a 10-year sentence for the firearms count, the sentences to run consecutively to each other and to the sentences previously imposed.
During the sentencing proceedings following each conviction, counsel for petitioners argued that the imposition of cumulative penalties for the two crimes was impermissible because the § 2113 (d) charge merged with the firearms offense for purposes of sentencing. The District Court disagreed, holding that “the statutes and the legislative history indicat [e] an intention [by § 924(c)] to impose an additional punishment.” App. 17. The Court of Appeals for the Sixth Circuit affirmed without a published opinion, 542 F. 2d 1177 (1976). We granted certiorari, 430 U. S. 964 (1977), to resolve an apparent conflict between the decision below and the decision of the Court of Appeals for the Eighth Circuit in United States v. Eagle, 539 F. 2d 1166 (1976).3 We reverse.
[10]*10II
Quite clearly, §§ 924 (c) and 2113 (d) are addressed to the same concern and designed to combat the same problem: the use of dangerous weapons — most particularly firearms — to commit federal felonies.4 Although we agree with the Court of Appeals that § 924 (c) creates an offense distinct from the underlying federal felony, United States v. Ramirez, 482 F. 2d 807 (CA2 1973); United States v. Sudduth, 457 F. 2d 1198 (CA1 1972), we believe that this is the beginning and not the end of the analysis necessary to answer the question presented for decision.
[11]*11In Blockburger v. United States, 284 U. S. 299 (1932), this Court set out the test for determining “whether two offenses are sufficiently distinguishable to permit the imposition of cumulative punishment.” Brown v. Ohio, 432 U. S. 161, 166 (1977). We held that “[t]he applicable rule is that where the same act or transaction constitutes a violation of two distinct statutory provisions, the test to be applied to determine whether there are two offenses or only one, is whether each provision requires proof of a fact which the other does not.” Blockburger v. United States, supra, at 304. See also Brown v. Ohio, supra, at 166; Ianelli v. United States, 420 U. S. 770 (1975); Gore v. United States, 357 U. S. 386 (1958). The Blockburger test has its primary relevance in the double jeopardy context, where it is a guide for determining when two separately defined crimes constitute the “same offense” for double jeopardy purposes. Brown v. Ohio, supra.5
Cases in which the Government is able to prove violations of two separate criminal statutes with precisely the same factual showing, as here, raise the prospect of double jeopardy and the possible need to evaluate the statutes in light of the Blockburger test. That test, the Government argues, is satisfied in this litigation.6 We need not reach the issue. Before an [12]*12examination is made to determine whether cumulative punishments for the two offenses are constitutionally permissible, it is necessary, following our practice of avoiding constitutional decisions where possible, to determine whether Congress intended to subject the defendant to multiple penalties for the single criminal transaction in which he engaged. Jeffers v. United States, 432 U. S. 137, 155 (1977). Indeed, the Government concedes that “there remains at least a possibility that Congress, although constitutionally free to impose additional penalties for violation of 18 U. S. C. § 924 (c) in a case like the present one, has otherwise disclosed its intention not to do so.” Brief for United States 11. We believe that several tools of statutory construction applied to the statutes “in a case like the present one” — where the Government relied on the same proofs to support the convictions under both statutes — require the conclusion that Congress cannot be said to [13]*13have authorized the imposition of the additional penalty of § 924 (c) for commission of bank robbery with firearms already subject to enhanced punishment under § 2113 (d). Cf. Gore v. United States, supra.
Ill
First is the legislative history of § 924 (c). That provision, which was enacted as part of the Gun Control Act of 1968, was not included in the original Gun Control bill, but was offered as an amendment on the House floor by Representative Poff. 114 Cong. Rec. 22231 (1968).7 In his statement immediately following his introduction of the amendment, Representative Poff observed: 4
“For the sake of legislative history, it should be noted that my substitute is not intended to apply to title 18, sections 111, 112, or 113 which already define the penalties for the use of a firearm in assaulting officials, with sections 2113 or 2114 concerning armed robberies of the mail or banks, with section 2231 concerning armed assaults upon process servers or with chapter 44 which defines other firearm felonies.” Id., at 22232.
This statement is clearly probative of a legislative judgment that the purpose of § 924 (c) is already served whenever the substantive federal offense provides enhanced punishment for use of a dangerous weapon.8 Although these remarks are of course not dispositive of the issue of § 924 (c)’s reach, they are certainly entitled to weight, coming as they do from the provision’s sponsor. This is especially so because Represent[14]*14ative Poff’s explanation of the scope of his amendment is in complete accord with, and gives full play to, the deterrence rationale of § 924 (c). United States v. Eagle, 539 F. 2d, at 1172. Subsequent events in the Senate and the Conference Committee pertaining to the statute buttress our conclusion that Congress’ view of the proper scope of § 924 (c) was that expressed by Representative Poff. Shortly after the House adopted the Poff amendment, the Senate passed an amendment to the Gun Control Act, introduced by Senator Dominick, that also provided for increased punishment whenever a firearm was used to commit a federal offense. 114 Cong. Rec. 27142 (1968). According to the analysis of its sponsor, the Senate amendment, contrary to Mr. Poff’s view of § 924 (c), would have permitted the imposition of an enhanced sentence for the use of a firearm in the commission of any federal crime, even where allowance was already made in the provisions of the substantive offense for augmented punishment where a dangerous weapon is used. Id., at 27143. A Conference Committee, with minor changes,9 subsequently adopted the Poff version of § 924 (c) in preference to the Dominick amendment. H. R. Conf. Rep. No. 1956, 90th Cong., 2d Sess., 31-32 (1968).
Second, to construe the statute to allow the additional sentence authorized by § 924 (c) to be pyramided upon a sentence already enhanced under § 2113 (d) would violate the established rule of construction that “ambiguity concerning the ambit of criminal statutes should be resolved in favor of lenity.” United States v. Bass, 404 U. S. 336, 347 (1971); [15]*15Rewis v. United States, 401 U. S. 808, 812 (1971). See Adamo Wrecking Co. v. United States, 434 U. S. 275, 284-285 (1978). The legislative history of § 924 (c) is of course sparse, yet what there is — particularly Representative Poff’s statement and the Committee rejection of the Dominick amendment — points in the direction of a congressional view that the section was intended to be unavailable in prosecutions for violations of § 2113 (d). Even where the relevant legislative history was not nearly so favorable to the defendant as this, this Court has steadfastly insisted that “doubt will be resolved against turning a single transaction into multiple offenses.” Bell v. United States, 349 U. S. 81, 84 (1955); Ladner v. United States, 358 U. S. 169 (1958). See Prince v. United States, 352 U. S. 322 (1957). As we said in Ladner: “This policy of lenity means that the Court will not interpret a federal criminal statute so as to increase the penalty that it places on an individual when such an interpretation can be based on no more than a guess as to what Congress intended.” 358 U. S., at 178. If we have something “more than a guess” in this case, that something — Representative Poff’s commentary and the Conference Committee’s rejection of the Dominick amendment — is incremental knowledge that redounds to petitioners’ benefit, not the Government’s.
Finally, our result is supported by the principle that gives precedence to the terms of the more specific statute where a general statute and a specific statute speak to the same concern, even if the general provision was enacted later. See Preiser v. Rodriguez, 411 U. S. 475, 489-490 (1973). Cf. 2A C. Sands, Sutherland, Statutory Construction § 51.05 (4th ed. 1973). This guide to statutory construction has special cogency where a court is called upon to determine the extent of the punishment to which a criminal defendant is subject for his transgressions. In this context, the principle is a corollary of the rule of lenity, ah outgrowth of our reluctance to increase or multiply punishments absent a clear and definite legislative [16]*16directive. Indeed, at one time, the Government was not insensitive to these concerns respecting the availability of the additional penalty under § 924 (c). In 1971, the Department of Justice found the interpretive preference for specific criminal statutes over general criminal statutes of itself sufficient reason to advise all United States Attorneys not to prosecute a defendant under §924 (c)(1) where the substantive statute the defendant was charged with violating already “provid [ed] for increased penalties where a firearm is used in the commission of the offense.” 19 U. S. Attys. Bull. 63 (U. S. Dept. of Justice, 1971).
Obviously, the Government has since changed its view of the relationship between §§ 924 (c) and 2113 (d). We think its original view was the better view of the congressional understanding as to the proper interaction between the two statutes. Accordingly, we hold that in a prosecution growing out of a single transaction of bank robbery with firearms, a defendant may not be sentenced under both § 2113 (d) and § 924 (c). The cases are therefore reversed and remanded to the Court of Appeals for proceedings consistent with this opinion.
It is so ordered.