He was meeting another teenager to sell him an airsoft gun.
But both teens ended up being arrested.
On June 11, police officers arrested the two teenagers, aged 15 and 17, at a block at Yishun Ring Road for possession of airsoft guns.
Investigations revealed that the older teen was planning to sell the gun to the younger one.
The 17-year-old had earlier purchased the airsoft gun from a man, aged 26.
The latter was arrested on June 12 in Choa Chu Kang and was found to have two other airsoft guns with pellets and gas refills, which were also seized.
In a separate case, a 27-year-old man was arrested at Jurong West Street 61 on Sunday for the possession of an airsoft gun.
The suspect was also found to allegedly be involved in a criminal intimidation case and drug-related offences.
Airsoft guns and other guns which use compressed gas to shoot pellets are considered "arms", and are regulated under the Arms and Explosives Act.
No one is allowed to have these items in their possession unless they have a licence.
The police had previously explained that airsoft guns resemble real weapons that may be used for criminal acts.
In addition, these guns can cause injuries if used improperly.
Anyone found guilty can be fined up to $5,000 for every gun in their possession and jailed up to three years.
It is also an offence to import or export any arms or explosives or parts of any arms or explosives.
Anyone found guilty of doing so can be jailed up to three years and fined up to $10,000.
Investigations against all four suspects are ongoing.
This article was first published on June 30, 2015.
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