System for changing the barrel of a gun or weapon

A system for changing the barrel of a firearm, said firearm comprising:

• a stock having a trigger mounted thereon;
• a housing part removably attached to said stock in a fixed operative position, said housing part having a sighting mechanism on its upper side;
• a barrel mounted in the housing part;
• a breech block disposed in the housing part which travels rearward on firing;
• a locking system mounted in the housing part cooperating with said breech block;
• a closing spring surrounding the barrel;
• means for connecting the closing spring to the breech block;
• a firing pin reciprocally received within the breech block;
• means for removably retaining said barrel, closing spring, breech block, connecting means, and locking system within said housing part;
• a releasable key means for holding said housing part in the fixed operative position, said releasable key means having a release position to remove the housing part in a direction substantially transverse thereto, said barrel, closing spring, breech block, connecting means, and locking system being retained within the housing part in operative positions with respect to each other, said housing part being held in fixed position with respect to the stock;
• wherein said housing part is positioned along a plane onto the stock in an end region of the breech block, said housing part having protrusions extending into depressions in the stock and a locking unit disposed at a distance from the protrusions which detachably locks with another locking unit provided on the stock.

A system for changing the barrel of a firearm, said firearm comprising:

• a stock having a trigger mounted thereon;
• a housing part removably attached to said stock in a fixed operative position, said housing part having a sighting mechanism on its upper side;
• a barrel mounted in the housing part;
• a breech block disposed in the housing part which travels rearward on firing;
• a locking system mounted in the housing part cooperating with said breech block;
• a closing spring surrounding the barrel;
• means for connecting the closing spring to the breech block;
• a firing pin reciprocally received within the breech block;
• means for removably retaining said barrel, closing spring, breech block, connecting means, and locking system within said housing part;
• a releasable key means for holding said housing part in the fixed operative position, said releasable key means having a release position to remove the housing part in a direction substantially transverse thereto, said barrel, closing spring, breech block, connecting means, and locking system being retained within the housing part in operative positions with respect to each other, said housing part being held in fixed position with respect to the stock;
• wherein the system further comprises guide paths extending parallel to the barrel formed on the breech, said guide paths having ends that touch stops located on the stock when the breech is open.

A system for changing the barrel of a firearm, said firearm comprising:

• a stock having a trigger mounted thereon;
• a housing part removably attached to said stock in a fixed operative position, said housing part having a sighting mechanism on its upper side;
• a barrel having a muzzle end mounted in the housing part;
• a breech block disposed in the housing part which travels rearward on firing and cooperates with a gas-pressure controlled breech locking system mounted in the housing part, said locking system having a gas-pressure loaded spring guide bushing acting on the breech block and located around the barrel;
• a closing spring surrounding the barrel and braced against the spring guide bushing;
• means for connecting the closing spring to the breech block;
• a firing pin reciprocally received within the breech block;
• means for removably retaining said barrel, closing spring, breech block, connecting means, and locking system within said housing part;
• a releasable key means for holding said housing part in the fixed operative position, said releasable key means having a release position to remove the housing part in a direction substantially transverse thereto, said barrel, closing spring, breech block, connecting means, and locking system being retained within the housing part in operative positions with respect to each other, said housing part being held in fixed position with respect to the stock;
• a compensator detachably mounted in a preset relative position on an end of the housing part corresponding to the barrel muzzle, said muzzle end of the barrel being tightly seated in the compensator without clearance;
• wherein said housing part has an interior that is cylindrical and further comprising a slide securing the barrel, breech, locking system, breech closing spring and firing pin, said slide contacting the barrel and sliding transverse thereto in the housing part such that the barrel can be easily removed from the housing part and replaced with another one.

A system for changing the barrel of a firearm, said firearm comprising:

• a stock having a trigger mounted thereon;
• a housing part removably attached to said stock in a fixed operative position, said housing part having a sighting mechanism on its upper side;
• a barrel having a muzzle end mounted in the housing part;
• a breech block disposed in the housing part which travels rearward on firing and cooperates with a gas-pressure controlled breech locking system mounted in the housing part, said locking system having a gas-pressure loaded spring guide bushing acting on the breech block and located around the barrel;
• a closing spring surrounding the barrel and braced against the spring guide bushing;
• means for connecting the closing spring to the breech block;
• a firing pin reciprocally received within the breech block;
• means for removably retaining said barrel, closing spring, breech block, connecting means, and locking system within said housing part;
• a releasable key means for holding said housing part in the fixed operative position, said releasable key means having a release position to remove the housing part in a direction substantially transverse thereto, said barrel, closing spring, breech block, connecting means, and locking system being retained within the housing part in operative positions with respect to each other, said housing part being held in fixed position with respect to the stock;
• a compensator detachably mounted in a preset relative position on an end of the housing part corresponding to the barrel muzzle, said muzzle end of the barrel being tightly seated in the compensator without clearance;
• wherein said housing part is positioned onto the stock of the other firearm along a plane in a breech-side end region, said housing part having protrusions that fit into depressions in the stock and further having a locking unit located at a distance to the protrusions that is detachably locked to another locking unit provided on the stock.

A system for changing the barrel of a firearm, said firearm comprising:

• a stock having a trigger mounted thereon;
• a housing part removably attached to said stock in a fixed operative position, said housing part having a sighting mechanism on its upper side;
• a barrel having a muzzle end mounted in the housing part;
• a breech block disposed in the housing part which travels rearward on firing and cooperates with a gas-pressure controlled breech locking system mounted in the housing part, said locking system having a gas-pressure loaded spring guide bushing acting on the breech block and located around the barrel;
• a closing spring surrounding the barrel and braced against the spring guide bushing;
• means for connecting the closing spring to the breech block;
• a firing pin reciprocally received within the breech block;
• means for removably retaining said barrel, closing spring, breech block, connecting means, and locking system within said housing part;
• a releasable key means for holding said housing part in the fixed operative position, said releasable key means having a release position to remove the housing part in a direction substantially transverse thereto, said barrel, closing spring, breech block, connecting means, and locking system being retained within the housing part in operative positions with respect to each other, said housing part being held in fixed position with respect to the stock;
• a compensator detachably mounted in a preset relative position on an end of the housing part corresponding to the barrel muzzle, said muzzle end of the barrel being tightly seated in the compensator without clearance;
• wherein the system further comprises guide paths extending parallel to the barrel formed on the breech, said guide paths having ends contact stops located at the stock when the breech is opened.

A system for changing the barrel of a firearm, said firearm comprising:

• a stock having a trigger mounted thereon;
• a housing part removably attached to said stock in a fixed operative position, said housing part having a sighting mechanism on its upper side;
• a barrel mounted in the housing part;
• a breech block disposed in the housing part which travels rearward on firing;
• a locking system mounted in the housing part cooperating with said breech block;
• a closing spring surrounding the barrel;
• means for connecting the closing spring to the breech block;
• a firing pin reciprocally received within the breech block;
• means for removably retaining said barrel, closing spring, breech block, connecting means, and locking system within said housing part;
• a releasable key means for holding said housing part in the fixed operative position, said releasable key means having a release position to remove the housing part in a direction substantially transverse thereto, said barrel, closing spring, breech block, connecting means, and locking system being retained within the housing part in operative positions with respect to each other, said housing part being held in fixed position with respect to the stock;
• wherein said locking system comprises a gas-pressure controlled locking system having a gas-pressure-impacted spring guide bushing acting on the breech, said spring guide bushing and said breech closing spring being located around the barrel, and said breech closing spring being braced against the spring guide bushing;
• and wherein said housing part is positioned along a plane onto the stock in an end region of the breech block, said housing part having protrusions extending into depressions in the stock and a locking unit disposed at a distance from the protrusions which detachably locks with another locking unit provided on the stock.

A system for changing the barrel of a firearm, said firearm comprising:

• a stock having a trigger mounted thereon;
• a housing part removably attached to said stock in a fixed operative position, said housing part having a sighting mechanism on its upper side;
• a barrel mounted in the housing part;
• a breech block disposed in the housing part which travels rearward on firing;
• a locking system mounted in the housing part cooperating with said breech block;
• a closing spring surrounding the barrel;
• means for connecting the closing spring to the breech block;
• a firing pin reciprocally received within the breech block;
• means for removably retaining said barrel, closing spring, breech block, connecting means, and locking system within said housing part;
• a releasable key means for holding said housing part in the fixed operative position, said releasable key means having a release position to remove the housing part in a direction substantially transverse thereto, said barrel, closing spring, breech block, connecting means, and locking system being retained within the housing part in operative positions with respect to each other, said housing part being held in fixed position with respect to the stock;
• wherein said locking system comprises a gas-pressure controlled locking system having a gas-pressure-impacted spring guide bushing acting on the breech, said spring guide bushing and said breech closing spring being located around the barrel, and said breech closing spring being braced against the spring guide bushing;
• and wherein said system further comprises guide paths extending parallel to the barrel formed on the breech, said guide paths having ends that touch stops located on the stock when the breech is open.

A system for changing the barrel of a firearm, said firearm comprising:

• a stock having a trigger mounted thereon;
• a housing part removably attached to said stock in a fixed operative position, said housing part having a sighting mechanism on its upper side;
• a barrel having a muzzle end mounted in the housing part;
• a breech block disposed in the housing part which travels rearward on firing and cooperates with a gas-pressure controlled breech locking system mounted in the housing part, said locking system having a gas-pressure loaded spring guide bushing acting on the breech block and located around the barrel;
• a closing spring surrounding the barrel and braced against the spring guide bushing;
• means for connecting the closing spring to the breech block;
• a firing pin reciprocally received within the breech block;
• means for removably retaining said barrel, closing spring, breech block, connecting means, and locking system within said housing part;
• a releasable key means for holding said housing part in the fixed operative position, said releasable key means having a release position to remove the housing part in a direction substantially transverse thereto, said barrel, closing spring, breech block, connecting means, and locking system being retained within the housing part in operative positions with respect to each other, said housing part being held in fixed position with respect to the stock;
• a compensator detachably mounted in a preset relative position on an end of the housing part corresponding to the barrel muzzle, said muzzle end of the barrel being tightly seated in the compensator without clearance;
• wherein the compensator has a cylindrical attachment with a radial protruding hub and the housing part has a cylindrical depression to hold the set in which a bayonet breech depression is formed, and further comprising a spring-loaded snap pin sliding parallel to the longitudinal axis of the housing part, said snap pin fitting in an opening of the compensator when at rest;
• and wherein said housing part has an interior that is cylindrical and further comprising a slide securing the barrel, breech, locking system, breech closing spring and firing pin, said slide contacting the barrel and sliding transverse thereto in the housing part such that the barrel can be easily removed from the housing part and replaced with another one.

A system for changing the barrel of a firearm, said firearm comprising:

• a stock having a trigger mounted thereon;
• a housing part removably attached to said stock in a fixed operative position, said housing part having a sighting mechanism on its upper side;
• a barrel having a muzzle end mounted in the housing part;
• a breech block disposed in the housing part which travels rearward on firing and cooperates with a gas-pressure controlled breech locking system mounted in the housing part, said locking system having a gas-pressure loaded spring guide bushing acting on the breech block and located around the barrel;
• a closing spring surrounding the barrel and braced against the spring guide bushing;
• means for connecting the closing spring to the breech block;
• a firing pin reciprocally received within the breech block;
• means for removably retaining said barrel, closing spring, breech block, connecting means, and locking system within said housing part;
• a releasable key means for holding said housing part in the fixed operative position, said releasable key means having a release position to remove the housing part in a direction substantially transverse thereto, said barrel, closing spring, breech block, connecting means, and locking system being retained within the housing part in operative positions with respect to each other, said housing part being held in fixed position with respect to the stock;
• a compensator detachably mounted in a preset relative position on an end of the housing part corresponding to the barrel muzzle, said muzzle end of the barrel being tightly seated in the compensator without clearance;
• wherein the compensator has a cylindrical attachment with a radial protruding hub and the housing part has a cylindrical depression to hold the set in which a bayonet breech depression is formed, and further comprising a spring-loaded snap pin sliding parallel to the longitudinal axis of the housing part, said snap pin fitting in an opening of the compensator when at rest;
• and wherein said housing part is positioned onto the stock of the other firearm along a plane in a breech-side end region, said housing part having protrusions that fit into depressions in the stock and further having a locking unit located at a distance to the protrusions that is detachably locked to another locking unit provided on the stock.

A system for changing the barrel of a firearm, said firearm comprising:

• a stock having a trigger mounted thereon;
• a housing part removably attached to said stock in a fixed operative position, said housing part having a sighting mechanism on its upper side;
• a barrel having a muzzle end mounted in the housing part;
• a breech block disposed in the housing part which travels rearward on firing and cooperates with a gas-pressure controlled breech locking system mounted in the housing part, said locking system having a gas-pressure loaded spring guide bushing acting on the breech block and located around the barrel;
• a closing spring surrounding the barrel and braced against the spring guide bushing;
• means for connecting the closing spring to the breech block;
• a firing pin reciprocally received within the breech block;
• means for removably retaining said barrel, closing spring, breech block, connecting means, and locking system within said housing part;
• a releasable key means for holding said housing part in the fixed operative position, said releasable key means having a release position to remove the housing part in a direction substantially transverse thereto, said barrel, closing spring, breech block, connecting means, and locking system being retained within the housing part in operative positions with respect to each other, said housing part being held in fixed position with respect to the stock;
• a compensator detachably mounted in a preset relative position on an end of the housing part corresponding to the barrel muzzle, said muzzle end of the barrel being tightly seated in the compensator without clearance;
• wherein the compensator has a cylindrical attachment with a radial protruding hub and the housing part has a cylindrical depression to hold the set in which a bayonet breech depression is formed, and further comprising a spring-loaded snap pin sliding parallel to the longitudinal axis of the housing part, said snap pin fitting in an opening of the compensator when at rest;
• and wherein the system further comprises guide paths extending parallel to the barrel formed on the breech, said guide paths having ends contact stops located at the stock when the breech is opened.

A system for changing the barrel of a firearm, said firearm comprising:

• a stock having a trigger mounted thereon;
• a housing part removably attached to said stock in a fixed operative position, said housing part having a sighting mechanism on its upper side;
• a barrel mounted in the housing part;
• a breech block disposed in the housing part which travels rearward on firing;
• a locking system mounted in the housing part cooperating with said breech block;
• a closing spring surrounding the barrel;
• means for connecting the closing spring to the breech block;
• a firing pin reciprocally received within the breech block;
• means for removably retaining said barrel, closing spring, breech block, connecting means, and locking system within said housing part;
• a releasable key means for holding said housing part in the fixed operative position, said releasable key means having a release position to remove the housing part in a direction substantially transverse thereto, said barrel, closing spring, breech block, connecting means, and locking system being retained within the housing part in operative positions with respect to each other, said housing part being held in fixed position with respect to the stock;
• wherein said locking system comprises a gas-pressure controlled locking system having a gas-pressure-impacted spring guide bushing acting on the breech, said spring guide bushing and said breech closing spring being located around the barrel, and said breech closing spring being braced against the spring guide bushing;
• and wherein said housing part has an interior space of cylindrical design and further comprising a slide securing the barrel, breech, locking system, breech closing spring and firing pin in the housing part, said slide sliding transverse in the housing part and contacting the barrel such that the barrel can be easily removed from the housing part and replaced with another barrel.