Abstract: A barrel system for a paintball gun allows a user to quickly change the magna porting size of the barrel without the need to switch the barrel. A peg is located on an outer surface of the barrel as is a first port. A barrel tip has a second port aligned with a first channel and a third port of a different size relative to the second port, the third port aligned with a second channel. The barrel is received within the barrel tip so that the peg is either received within the first channel and thereby overlaying the second port with the first port, or the peg is received within the second channel and thereby overlaying the third port with the first port. An additional of port of yet another size as well as a null port may be provided, each with its own aligned channel.

Abstract: There is presented a screening system and a corresponding method for screening an item. The screening system includes a detection apparatus (100), a rotatable platform (310) to receive the item, and a mechanical arrangement (320, 330). The detection apparatus has an emitter portion to generate a primary beam of ionising radiation and a detector portion to detect an absorption signal and at least one of a diffraction signal and a scattering signal. The mechanical arrangement is adapted to translate the detection apparatus along a translation axis to scan the item with the primary beam. The screening system may be used for identifying restricted or illicit substances that may be present in some luggage or in mail.

Abstract: There is presented a screening system and a corresponding method for screening an item. The screening system includes a detection apparatus (100), a rotatable platform (310) to receive the item, and a mechanical arrangement (320, 330). The detection apparatus has an emitter portion to generate a primary beam of ionising radiation and a detector portion to detect an absorption signal and at least one of a diffraction signal and a scattering signal. The mechanical arrangement is adapted to translate the detection apparatus along a translation axis to scan the item with the primary beam. The screening system may be used for identifying restricted or illicit substances that may be present in some luggage or in mail.

Abstract: An attachment system is provided for attaching a neck protector to a face mask. The attachment system includes a cord and a connector where the connector comprises a first portion and a second portion with corresponding engaging elements. The cord is adapted to be disposed through openings in the neck protector and the face mask and the engaging elements are adapted to connect the first portion of the connector to the second portion of the connector once the cord is disposed through the openings to attach the neck protector to the face mask. Kits for attaching a neck protector to a face mask are also provided where the kits include one or both of the neck protector and face mask together with the attachment system.

Abstract: An attachment system is provided for attaching a neck protector to a face mask. The attachment system includes a cord and a connector where the connector comprises a first portion and a second portion with corresponding engaging elements and a throughbore defined through each of the first portion and the second portion for receiving the cord. Kits for attaching a neck protector to a face mask are also provided where the kits include one or both of the neck protector and face mask together with the attachment system.

Abstract: A three-component barrel system for a paintball gun uses a barrel back that threadably couples to the gun. A barrel tip is magnetically coupled to the barrel back. A barrel insert, through which the paintballs are actually fired, is received within the hollow interior formed by the coupled barrel back and barrel tip. The barrel insert has porting thereon as does the barrel tip the two sets of porting correspond with one another. A channel within the barrel tip slidably receives a peg on an exterior of the barrel insert in order to assure proper alignment between barrel tip and barrel insert. The bore of the barrel insert can taper outwardly in proceeding from its breach end to its muzzle end.

Abstract: An attachment system is provided for attaching a neck protector to a face mask. The attachment system includes a cord and a connector where the connector comprises a first portion and a second portion with corresponding engaging elements and a throughbore defined through each of the first portion and the second portion for receiving the cord. Kits for attaching a neck protector to a face mask are also provided where the kits include one or both of the neck protector and face mask together with the attachment system.