Horizontal Magazine Shotguns

IEU-HS Series

Our Horizontal Magazine Shotgun Models

IEU-HS-01

IEU-HS-02

IEU-HS-03

A horizontal magazine shotgun stores its shells in a tube that runs horizontally under the barrel, instead of in a vertical box magazine below the receiver. Shells are loaded one at a time through a port under the receiver. Iber’s IEU-HS series are tube-fed 12 gauge gas-operated semi-autos with a 4+1 capacity.

Horizontal Magazine Shotgun Specifications (IEU-HS Series)

Specification	IEU-HS series
Action	Gas-operated semi-automatic
Gauge	12 gauge
Chamber	76 mm (3″); also fires 70 mm (2¾”) shells
Magazine	Horizontal tube under the barrel, 4+1 (four in the tube, one chambered)
Barrels	4140 steel; 47 cm (18.5″), 51 cm (20″), 56 cm (22″), 61 cm (24″)
Receiver	Aluminum
Chokes	Mobil-type interchangeable choke tubes; slug option
Stock	Fixed synthetic (IEU-HS-01) or collapsible pistol-grip stock (IEU-HS-02, HS-03)

Tube Magazine or Box Magazine?

Both feed a semi-auto, but they suit different buyers. A tube magazine keeps the gun slim and balanced, has no magazine sticking out underneath and needs no spare magazines; you top it up one shell at a time. A detachable box magazine reloads faster and can hold more, but it adds bulk, cost and a part that must be kept in good condition.

If your market prefers detachable magazines, see our magazine-fed shotguns.

Horizontal Magazine Shotgun Manufacturer in Türkiye

Iber Arms has manufactured shotguns in Beyşehir, Konya, Türkiye, since 2000 and has exported since 2010. The IEU-HS series uses 4140 steel barrels and aluminum receivers, finished in our own plant, which also runs a hard-chrome line; guns are assembled and test-fired in-house.

We supply importers, distributors, licensed dealers and government buyers only. Orders of any quantity, evaluation samples and private-label versions with your logo, stock choice and barrel length are available.

Tell us your market and quantities through the inquiry form and our export team will send the technical sheet and a quotation.

INQUIRY FORM

Horizontal Magazine Shotgun FAQ

What is a horizontal magazine shotgun?

It is a shotgun whose shells are stored in a tube running horizontally under the barrel, rather than in a vertical box magazine. You load it one shell at a time through a port under the receiver. Iber’s IEU-HS models are 12 gauge gas-operated semi-autos with a 4+1 tube.

Is a tube magazine better than a box magazine?

It depends on the use. A tube keeps the gun slim and balanced, needs no spare magazines and feeds a wide range of loads, but reloads slowly. A box magazine reloads quickly and can hold more, but adds bulk and cost and can be more sensitive to shell length. Many hunters and agencies still prefer tubes.

How many shells does the IEU-HS hold?

The IEU-HS series is 4+1, meaning four shells in the tube and one in the chamber for five in total. The 76 mm (3″) chamber accepts both 70 mm and 76 mm 12 gauge shells, although longer shells may reduce how many fit in the tube.

How do you load a tube-fed semi-auto shotgun?

With the muzzle pointed safely and the safety on, push shells one at a time through the loading port under the receiver until the tube is full. A shell is then chambered by cycling the action as described in the manual. Procedures differ between models, so always follow the manual supplied with the gun.

Can a horizontal magazine shotgun shoot slugs?

Yes. The IEU-HS series is offered with interchangeable choke tubes and a slug option. For Foster-type slugs, a cylinder or improved-cylinder choke is the usual choice; follow the slug and choke makers’ guidance and check point of impact on paper before use.

Which barrel length should I choose?

A 47 cm (18.5″) barrel is the most compact and suits indoor and vehicle use. The 51 cm (20″) and 56 cm (22″) barrels balance handling and sight radius, and 61 cm (24″) gives the smoothest swing for hunting. In some countries, including Great Britain, barrel length also decides legal status.

Are tube-fed semi-auto shotguns legal in Canada and Australia?

In Canada, semi-automatic shotgun magazines are limited to five shells, which a 4-shell tube meets, but each model needs an RCMP classification. In Australia, a self-loading shotgun holding five or fewer is Category C, restricted to limited genuine reasons. This is general information; verify locally.

Can we order the IEU-HS under our own brand?

Yes. We build private-label versions with your logo, stock choice and barrel length for your market, and capacity can be discussed where local rules require it. Send your requirements through the inquiry form and our export team will confirm the configuration and send the technical sheet.

Do you sell to private individuals?

No. Iber Arms supplies importers, distributors, licensed dealers and government buyers only. Individuals should ask a licensed dealer or importer in their country, who can order through their own supply chain, check that the model is legal locally and handle the transfer.

Are samples available, and is there a minimum order?

Samples are available for evaluation, subject to the import and export permits required in both countries, and we accept orders of any quantity. Ask our export team which proof marks and certificates are available for your market and what documents your import permit needs.

Horizontal Magazine Shotgun Guide to Operation, Uses and Laws

Horizontal magazine shotguns at a glance

Feed system fixed tube magazine under the barrel, loaded through a port under the receiver.
Iber IEU-HS series 12 gauge gas-operated semi-autos, 4+1, 76 mm (3″) chamber, aluminum receiver.
Barrels 47, 51, 56 or 61 cm (18.5, 20, 22 or 24″), 4140 steel, interchangeable chokes.
Stocks fixed synthetic or collapsible pistol-grip.
Best for buyers who want a slim, balanced semi-auto without detachable magazines.

What does “horizontal magazine” mean on a shotgun?

It describes the classic tube magazine that runs horizontally under the barrel. Export catalogs use the term to separate tube-fed shotguns from vertical box-magazine models. The tube holds shells end to end, and a spring pushes them rearward toward the receiver.

On a gas-operated semi-auto such as the IEU-HS, firing a shell bleeds a small amount of gas from the barrel into the gas system, which drives the bolt rearward. The bolt extracts and ejects the empty hull and cocks the hammer, a shell is released from the tube onto the carrier, and the returning bolt chambers it. One trigger pull fires one shell, so the gun fires as fast as you pull the trigger until the tube is empty.

Because the tube is fixed, you reload by pushing shells one at a time through the loading port. That is slower than swapping a box magazine, but you can top up the tube while a shell is chambered.

Tube magazine vs box magazine shotgun

Feature	Horizontal tube (IEU-HS)	Detachable box magazine
Capacity	Fixed by tube length; 4+1 on the IEU-HS	Interchangeable magazines, commonly 2, 5 or 10 shells
Reload speed	One shell at a time	Fast magazine change
Profile and balance	Slim, nothing protruding, weight along the barrel	Magazine protrudes below the receiver
Topping up	Easy while a shell is chambered	Usually swap or remove the magazine
Shell sensitivity	Feeds a wide range of loads within chamber length	Box magazines are more sensitive to shell length and hull condition
Extra parts	None to buy	Spare magazines needed
Regulation	Fixed tube often treated more leniently	Detachable magazines attract extra rules in some jurisdictions
Iber range	IEU-HS series	Magazine-fed range

Other tube-fed options in our range include the M4-style gas semi-autos, field semi-autos and pump actions.

What are horizontal magazine shotguns used for?

Security and law enforcement a fixed 4+1 tube with no detachable magazine suits many agency policies.
Property and farm protection where lawful a compact 47 cm (18.5″) barrel handles well indoors and around buildings.
Sport and range use soft-shooting gas operation and a slim profile for practice and practical-style shooting.
Hunting with a longer barrel and the right choke tube. Where hunting rules cap capacity, for example at 2+1, ask about compliant configurations.

Iber IEU-HS horizontal magazine models

All three share the 12 gauge gas-operated action, 76 mm (3″) chamber, 4+1 tube, aluminum receiver, interchangeable chokes and 4140 steel barrels in 47, 51, 56 or 61 cm. They differ in stock.

Model	Stock	Capacity	Barrels	Typical role
IEU-HS-01	Fixed black synthetic stock	4+1	47 / 51 / 56 / 61 cm	All-round, hunting and markets that restrict pistol grips
IEU-HS-02	Collapsible stock with pistol grip	4+1	47 / 51 / 56 / 61 cm	Security, adjustable length of pull
IEU-HS-03	Collapsible pistol-grip stock with cheek riser	4+1	47 / 51 / 56 / 61 cm	Tactical and optic-equipped use

Longer barrels give a longer sight plane and smoother swing; shorter ones handle faster. Barrel length also decides legal status in some countries, as the table below shows.

Care of a tube-fed gas semi-auto

Clean the gas system (ports, piston and cylinder area) regularly; carbon build-up is the most common cause of short-cycling.
Unload the tube for storage, and occasionally remove the magazine spring and follower to clean the tube.
Lubricate the bolt and action bars lightly; keep oil out of the gas system unless the manual says otherwise.
Clean choke tubes and threads, and refit them fully tightened.

Horizontal magazine shotguns and the law (general information)

Semi-automatic shotguns are regulated more tightly than manual actions. This is general information as of October 2026, not legal advice; verify with the competent authority.

Country	General position
United States	All IEU-HS barrels exceed 18″, so standard configurations are outside the NFA if overall length is 26″ or more. Imports need a licensed importer and an ATF Form 6 permit and must meet the “sporting purposes” criteria, where pistol grips and collapsible stocks count against importability; semi-autos assembled with imported parts are subject to 922(r).
Canada	Magazines for semi-automatic centerfire shotguns are limited to five shells, which a 4-shell tube meets, but each model’s classification is set by the RCMP Firearms Reference Table. Verify before import.
Australia	A self-loading shotgun with a magazine capacity of five or fewer is Category C, available only for limited genuine reasons such as primary production. Confirm with the state or territory registry.
United Kingdom (Great Britain)	A 4-shell magazine needs a Section 1 certificate. Self-loading smooth-bore guns with barrels under 24″ or under 40″ overall are prohibited under Section 5, so only a 61 cm (24″) configuration of sufficient overall length could be considered.
South Africa	The self-defense license (s13) excludes semi-automatic shotguns; dedicated hunter or sport-shooter status (s16) is the usual route. Imports need a SAPS import permit.

Iber Arms sells only to licensed importers, distributors, dealers and government buyers. You can also explore our related pages on tactical shotguns and gas vs inertia shotguns.

Request the IEU-HS technical sheet

Tell us your destination, stock preference, barrel length and quantity. Send your inquiry, see our catalogs or email info@iberarms.com.

Reviewed by the Iber Arms technical & export team, October 2026.

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