Specna Arms Mid-cap S-Magazines for the J series 175 rds Set of 5

The Specna Arms S-Mag Mid-Cap J Series 175rds Set of 5 Black is a complete set of five polymer Mid-Cap magazines for AK-type airsoft replicas, and in particular the Specna Arms J Series. Each magazine has a capacity of 175 BBs, giving the complete set a nominal capacity of no less than 875 BBs.

The S-Mag series combines a sleek design with a sturdy polymer construction and a distinctive surface texture featuring the Specna Arms logo. Thanks to the Mid-Cap mechanism, there is no need for a winding wheel or separate BB magazines, whilst the internal spring is designed to ensure a reliable BB feed, even in replicas with a higher rate of fire.

Designed for the Specna Arms J Series

These S-Mag magazines have been specifically developed for the Specna Arms J Series, Specna Arms’ AK-inspired replica range. Their shape and fitting are based on the well-known AK magazine system, whereby the magazine is hooked in at the front and then tilted backwards into the magwell.

This means that the magazines are not intended for standard M4, AR15 or other STANAG platforms. They can also be used with various other compatible AK AEGs, but as with virtually all aftermarket AK magazines, the exact fit may vary slightly depending on the manufacturer, model and magwell.

No winding wheel required

As these are Mid-Cap magazines, the BBs are fed upwards directly by an internal spring. This means you don’t need to wind up a winding wheel at the bottom, as is the case with many traditional Hi-Cap magazines.

Furthermore, the BBs are not loose in a large magazine. This results in considerably less rattling whilst moving than with a Hi-Cap, which is particularly useful during milsim, CQB and other game formats where you want to minimise the noise produced by your kit.

Reliable BB supply

Specna Arms states that the S-Mag series has been developed to ensure a reliable BB feed, even in replicas with a higher ROF (Rate of Fire). The internal spring keeps the BBs under constant tension so that they are pushed towards the feed lips.

Of course, other factors are also important for good feeding, such as the BBs used, the hop-up unit, nozzle timing and the exact compatibility between the magazine and the replica. After all, a magazine can only deliver what the rest of the replica is capable of processing correctly.

Durable polymer construction

The magazine body is made from polymer. This keeps the weight down compared to all-metal magazines and makes the exterior less prone to dents during normal airsoft use.

Polymer magazines are also practical when carrying several magazines at once in a plate carrier, chest rig or belt setup. Five all-metal AK magazines can add a fair bit of weight; the polymer S-Mags make the entire loadout easier to manage.

Slim S-Mag design

The S-Mag has a relatively compact and slim profile and features a distinctive surface texture incorporating several Specna Arms logos. This texture not only gives the magazine a distinctive look but also provides extra grip when handling and changing magazines.

The slim design is also practical for use in various AK magazine pouches and universal tactical pouches. As always, it is advisable to check in advance that it fits with very tight-fitting or contoured pouches.

No battery, gas or CO₂ required

The magazine operates entirely mechanically using an internal spring and therefore requires no battery, gas or CO2. The entry “Power source: None” in the product specifications refers to this.

These are magazines for electric AK-type airsoft replicas and are therefore not gas reservoirs, as is the case with GBBR magazines. You should therefore always check which propulsion system your replica uses before purchasing a magazine.

Running in new Mid-Cap warehouses

New Mid-Cap magazines may have a relatively strong internal spring at first. It may therefore be helpful to fill and empty a new magazine a few times in a controlled manner before using it during a full skirmish.

Never force any more BBs into the magazine when you can clearly feel that it has reached its maximum capacity. Pushing too hard with a speedloader can put unnecessary strain on the follower, feed lips or internal spring.

Compatibility with other AK replicas

Specna Arms describes the magazines as intended for AK replicas, with the J Series naturally being the primary application. Several retailers also report compatibility with other AK-type replicas.

However, AK magwell dimensions and locking mechanisms are not exactly the same across all manufacturers. As a result, a magazine may fit perfectly on one model but sit slightly tighter or looser on another. We cannot therefore guarantee a completely universal fit when used with models other than the Specna Arms J Series.

Practical insights

A 175-round Mid-Cap is an interesting capacity for players who want a more realistic magazine experience without immediately having to resort to very small Real-Caps holding 30 to 50 BBs. With five magazines, you have a total of 875 BBs available, whilst still carrying out magazine changes during the game.

For a complete AK loadout, this five-piece set is also practical because all the magazines are the same model, have the same capacity and fit the same way. This means you don’t have to remember during a skirmish which magazine holds 100 BBs and which one, tucked away at the bottom of your pouch, suddenly turns out to be a rattling 500-round Hi-Cap.

Who is the Specna Arms S-Mag J Series 175-round Set of 5 suitable for?

The Specna Arms S-Mag Mid-Cap J Series 175rds Set of 5 Black is particularly suitable for players with a Specna Arms J Series or compatible AK AEG who wish to purchase several reliable Mid-Cap magazines at once. The combination of a 175 BB capacity, polymer construction and a set of five makes this model suitable for both regular skirmishes, milsim and CQB.

This is also an attractive set for players who want to switch from Hi-Caps to Mid-Caps. You get plenty of total capacity for a full loadout, without winding wheels and without the characteristic rattling of loose BBs in a Hi-Cap magazine.

Specificaties

• Merk: Specna Arms
• Series: S-Mag
• Product: S-Mag Mid-Cap J Series
• Platform: AK / Specna Arms J Series
• Replica drive system: AEG
• Warehouse type: Mid-Cap
• Capacity per warehouse: 175 BBs
• Number of warehouses: 5
• Total nominal capacity: 875 BBs
• Calibre: 6 mm airsoft BB
• Material: Polymer
• Colour: Black
• Feeding: Veerdruk / spring-fed
• Winding wheel: Nee
• Batteries required: No
• Gas required: No
• CO₂ required: No
• Weight of complete set: approx. 950 g

Contents of the pack

• 5x Specna Arms S-Mag Mid-Cap J Series 175rds Black

Common mistakes

• Do not confuse these J Series magazines with S-Mag magazines for M4/AR15 platforms.
• This version is designed for AK-type AEG replicas.
• When using the Specna Arms J Series outdoors, always check that it fits properly.
• Do not assume universal compatibility with every AK replica from every manufacturer.
• Do not use these magazines in a GBBR; these are AEG magazines.
• Do not confuse the 175-round Mid-Cap with the 380-round Hi-Cap version for the J Series.
• A Mid-Cap does not need to be wound up.
• Load the magazine using a suitable speedloader.
• Do not force any additional BBs into the magazine once it has reached its maximum capacity.
• If necessary, allow new mid-caps to undergo a few fill and empty cycles before they are used intensively.
• Use high-quality 6 mm airsoft BBs to ensure the most reliable feeding possible.
• Do not use BBs that are misshapen, damaged or heavily soiled.
• Do not apply large quantities of silicone oil to the BB channel; this may end up in the hop-up via the BBs.
• Keep the BB channel and the lip feed clean.
• Check for any damage to the feed lips before reusing the magazine.
• It is advisable not to keep Mid-Cap magazines fully loaded for long periods, so as not to keep the internal spring under unnecessary tension.
• Do not force a jammed magazine out of the magwell; check the magazine catch first.
• The stated weight of approximately 950 grams refers to the complete set and not to a single magazine.
• The nominal capacity of 175 BBs may vary slightly in practice, depending on the BBs, the speedloader and how full the magazine actually is.

Frequently Asked Questions

How many BBs fit into one magazine?
Each magazine has a nominal capacity of 175 BBs.

What is the total capacity of the set?
Five magazines, each holding 175 BBs, have a combined nominal capacity of 875 BBs.

Are these mid-cap or hi-cap magazines?
These are mid-cap magazines.

Do I need to wind these magazines?
No. Mid-Caps use an internal spring and do not have a winding wheel.

Do I need a speedloader?
Yes. A speedloader is the easiest way to load these Mid-Cap magazines.

Which replica models are these magazines designed for?
They are primarily designed for the Specna Arms J Series and other compatible AK-type AEGs.

Do they fit every AK AEG?
Not guaranteed. AK magwells and magazine catches may vary slightly depending on the manufacturer and model.

Are these magazines suitable for M4 replicas?
No. For this, you need magazines with an M4/AR15/STANAG profile.

Are they suitable for GBBR replicas?
No. These are mechanical Mid-Cap magazines for AEG platforms and do not contain a gas reservoir.

What material are the magazines made of?
The bodies are made of polymer.

What colour is this set?
This version is Black.

Are these magazines suitable for a high rate of fire?
Specna Arms states that the S-Mags are designed for reliable BB feeding, even at higher ROFs. Of course, how well they actually perform depends in part on the replica itself.

Why does a Mid-Cap rattle less than a Hi-Cap?
Because the BBs do not lie loose in a reservoir. They are housed in an internal feed channel and are held in place under pressure by a spring.

Can I store a Mid-Cap fully loaded?
This isn’t a problem for short-term use, but for long-term storage it’s better to remove the BBs so that the internal spring isn’t constantly under maximum strain.

Is there a tan version as well?
Yes. Specna Arms also offers the same 175-round J Series S-Mag 5-pack in tan, with a separate manufacturer’s part number. 

The Specna Arms S-Mag Mid-Cap J Series 175rds Set of 5 Black offers a complete Mid-Cap loadout for the Specna Arms J Series and compatible AK AEGs, comprising five sturdy polymer AK magazines, each with a capacity of 175 BBs, and featuring reliable spring-fed operation.