Home | Shop | Airsoft Guns | Airsoft Assault Rifles | AK Variants | SPECNA ARMS – SA-J73 CORE




Out of stock

Package include:

  • S-Mag Hi-Cap Magazine
  • QC certificate
  • Cleaning rod
  • Instruction
  • Replica
  • M90 additional spring

Package exclude:

  • The set does not include the battery or charger

Defence Required


FPS (ON 0.20g BB)


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Suitable for

, ,

Recommended Battery

LiPo 7.4v


Specna Arms meeting customer expectations presents the line CORE™ -an exceptional series of replicas that introduces a new quality in the market. Atractive price  combined with Innovative spring replacement system and high-quality materials make it a series for both beginners and experienced airsoft players.

The Specna Arms J-Series™ CORE™ carbines are made primarily from durable nylon fibre reinforced polymer, making the replica very light and comfortable. The model in question is made of polymer flask, pistol grip, body extrusion including flask holder, bed with gas tube cap, gas tube and base of the musket.
The most critical parts, such as the barrel holder, dummy slide, the barrel base with the stock, the bed holder, the barrel and the musket were made from zinc alloy and aluminium. The lock chamber cover, fuse wing, trigger holster, buttstock and rear suspension eyelet are made of steel.

Specna Arms J-Series™ CORE™  characterised by very good fit, low weight and ergonomics. In addition, the replica has been equipped with the quick spring replacement system ESA2™. The system allows the power of the replica to be adjusted without disassembling the replica. To replace the spring, simply remove the lock chamber cover, fold the buttstock and unscrew the screw holding the spring guide.

Features of the replica:

– body made of high density nylon polymer
– low weight
– very good fit
– metal hop-up chamber
– precision barrel internal 6.03mm diameter
– fast spring change system ESA2™
– included additional mainspring M90
– exit device on 24mm CW / 14mm CCW thread
– side mounting rail type “dovetail”
– realistic VFC system construction, based on pins, levers and pins
– plenty of space for a stick  battery under the breech chamber cover (LiPo ready)
– full flask, folds to the side of the body
– magazine well insert for easier reloading
– originally designed magazines mid-cap S-MAG

Most types of magazines made by Cyma, JG, E&L, Bolt will fit the replica seamlessly, fitting magazines from other brands may require minor modifications.

The replica has been fully adapted to work with batteries of the type LiPo and LiFe. Thanks to the base initial discharge velocity of the order ~380 FPS guaranteed by the factory-installed mainspring, the replica is perfect for medium range operations. A M90-type spring is also included, which allows the initial velocity to be reduced to ~310 FPS  thus making the replica perfectly suited for short-range or indoor operations.

The gearbox conceals 8-millimetre slide bearings and the supported steel gears mounted on them. The system is secured by four anti-reverse pawls. The lightweight, polycarbonate plastic piston is provided with a full steel bar  to increase its strength. It also uses a cylinder type 0  and steel interrupter. The strength of the parts allows it to work with M140 springs.

A valid defence is required to purchase any Airsoft Replica Firearm. If you don’t have a defence you must add Two Tone to your basket.

If you require a RIF to be painted two-tone to be VCRA compliant (No Valid Defence / Site Membership / UKARA etc) then please add TWO TONE to your order.

If you require a RIF to be painted two-tone to be VCRA compliant (No Valid Defence / Site Membership / UKARA etc) then please add TWO TONE to your order.

To purchase a realistically coloured Airsoft Replica Firearm (RIF) you must have a valid defence.  The most common of these is UKARA which stands for United Kingdom Airsoft Retailers Association and is essentially a database of registered players.  UKARA requires you must be a site member at any of the registered UK Airsoft sites.  This means you must play 3 games in MORE  than 56 Days. Once you become a member you are added to the database, please note paperwork and validation is required.  There are other types of defence, but UKARA is by far the most popular.  Please note this only applies to the gun, not the kit or accessories.

If you don’t yet have a defence, you can always add two-tone to your order. This simply means you have 51% painted in a bright colour such as green, blue or orange.  You can then purchase any RIF you wish.

If you have any questions regarding what is or isn’t a defence, or just looking for some general airsoft advice, then please drop us a call or contact us here


All items available in stock are available to collect in-store from our Nottingham or Sheffield bases. Alternatively, standard delivery is 3-5 days and is charged at £5.95 per order.

UK Airsoft sites are twinned with two playing sites in the midlands, both UKARA registered.  If Woodland is your preference, then take a look at Skirmish Airsoft. Located in the heart of Sherwood Forest, with several playing zones. It also has “Commando Rolls” catering facility and large ample car parking. The site has excellent facilities, including some safe-zone plug sockets for charging of batteries.

CQB your thing?  Within the store at UK Airsoft Nottingham we have 8000 square feet of purpose built CQB map.  It opens most Sundays and some midweek dates so get yourself booked in at Skirmish CQB.  There is also an electronic Attack Sense Target Range which is also open most days, but please call for availability.