15.— (1) Any person who possesses or controls any firearm or ammunition—

(a) with intent to endanger life or cause serious injury to property, or

(b) with intent to enable any other person by means of the firearm or ammunition to endanger life or cause serious injury to property,

shall, whether any injury to person or property has or has not been caused thereby, be guilty of an offence.

(2) A person guilty of an offence under this section is liable on conviction on indictment—

(a) to imprisonment for life or such shorter term as the court may determine, subject to subsections (4) to (6) of this section F88[…], and

(b) at the court’s discretion, to a fine of such amount as the court considers appropriate,

and the firearm or ammunition concerned shall be forfeited.

(3) The court, in imposing sentence on a person for an offence under this section, may, in particular, have regard to whether the person has a previous conviction for an offence under the Firearms Acts 1925 to 2006, the Offences against the State Acts 1939 to 1998 or the Criminal Justice (Terrorist Offences) Act 2005.

(4) Where a person (except a person under the age of 18 years) is convicted of an offence under this section, the court shall, in imposing sentence, specify a term of imprisonment of not less than 10 years as the minimum term of imprisonment to be served by the person.

F89[(4A) The purpose of subsections (5) and (6) of this section is to provide that in view of the harm caused to society by the unlawful possession and use of firearms, a court, in imposing sentence on a person (except a person under the age of 18 years) for an offence under this section, shall specify as the minimum term of imprisonment to be served by the person a term of not less than 10 years, unless the court determines that by reason of exceptional and specific circumstances relating to the offence, or the person convicted of it, it would be unjust in all the circumstances to do so.]

(5) Subsection (4) of this section does not apply where the court is satisfied that there are exceptional and specific circumstances relating to the offence, or the person convicted of it, which would make a sentence of imprisonment of not less than 10 years unjust in all the circumstances, and for this purpose the court may F90[, subject to subsection (6),] have regard to any matters it considers appropriate, including—

(a) whether the person pleaded guilty to the offence and, if so—

(i) the stage at which the intention to plead guilty was indicated,

(ii) the circumstances in which the indication was given,

and

(b) whether the person materially assisted in the investigation of the offence.

(6) The court, in considering for the purposes of subsection (5) of this section whether a sentence of not less than 10 years imprisonment is unjust in all the circumstances, may have regard, in particular, to—

(a) whether the person convicted of the offence has a previous conviction for an offence under the Firearms Acts 1925 to 2006, the Offences Against the State Acts 1939 to 1998 or the Criminal Justice (Terrorist Offences) Act 2005, and

(b) whether the public interest in preventing the unlawful possession or use of firearms would be served by the imposition of a lesser sentence.

(7) F88[…]

(8) F88[…]

(9) Section 27C of the Firearms Act 1964 applies in relation to proceedings for an offence under this section and to any minimum term of imprisonment imposed under subsection (4) or (8) of this section in those proceedings.]