Method and apparatus for attaching a supplemental device to an unaltered host firearm

A supplemental device assembly suitable for attachment to an unaltered host weapon having a breech bracing structure and a bayonet attachment point, the supplemental device assembly comprising:

• (a) an elongated supplemental device barrel;
• (b) an elongated interbar operatively connected to the supplemental device barrel;
• (c) a front mount attached to the front of the interbar, the front mount being constructed and arranged to reversibly connect without the need for tools to the bayonet attachment point;
• and
• (d) a rear mount attached to the rear of the interbar, the rear mount being constructed and arranged to operatively engage the breech bracing structure without the need for tools, whereby the supplemental device assembly is reversibly secured without tools to the unaltered host weapon.

A weapon system comprising:

• (a) a host weapon comprising a breech bracing structure and a bayonet attachment point;
• (b) a supplemental device assembly comprising an elongated barrel and an elongated interbar operatively connected thereto;
• (c) a front mount attached to the front of the interbar, the front mount being constructed and arranged to reversibly connect to the bayonet attachment point;
• and
• (d) a rear mount attached to the rear of the interbar, the rear mount being constructed and arranged to operatively engage the breech bracing structure, whereby the supplemental device assembly is reversibly secured to the host weapon, and whereby the host weapon can be used as a single-purpose dedicated weapon or the supplemental device assembly can be attached to the host weapon to create a dual-purpose weapon.

An interbar assembly for reversibly attaching a supplemental device to a host weapon, the host weapon having a butt, a barrel, a breech portion, a sling strap having a barrel end and a butt end, a butt sling strap attachment point and a barrel sling strap attachment point, and the interbar assembly comprising:

• (a) an elongated interbar having a front end and a rear end, the interbar carrying the supplemental device;
• (b) a front mount attached to the front end of the interbar, the front mount being constructed and arranged to reversibly connect proximate the host weapon barrel;
• (c) a rear mount attached to the rear end of the interbar, the rear mount being constructed and arranged to reversibly connect proximate the breech portion of the host weapon;
• and
• (d) a supplemental sling strap attachment point located on the interbar, wherein the barrel end of the sling strap may be relocated from the barrel sling strap attachment point to the supplemental sling strap attachment point when the interbar assembly is attached to the host weapon.

An interbar assembly for reversibly attaching a supplemental device to a host weapon having a barrel, a breech portion, and a host weapon sight, the interbar assembly comprising:

• (a) an elongated interbar having a front end and a rear end, the interbar carrying the supplemental device;
• (b) a front mount attached to the front end of the interbar, the front mount being constructed and arranged to reversibly connect proximate the host weapon barrel;
• (c) a rear mount attached to the rear end of the interbar, the rear mount being constructed and arranged to reversibly connect proximate the breech portion of the host weapon;
• and
• (d) a supplemental device sight located on the interbar.