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Spartan Delta SX18 M4 Airsoft Rifle - Full Metal

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Earn 199 Target Points

The Spartan Delta SX18 M4 Mod AEG Airsoft Gun is an impressive addition to the Spartan line up.

The first thing you will notice when holding the SX18 is how solid and realistic it feels. This can be attributed to its full metal gearbox and full length quad-rail RIS unit.

The battery for the rifle is housed in the crane stock (nun-chuck style NiMh or LiPo is fine), which is fully adjustable to 6 positions. The front and rear flip-up sights are removable, providing far more than enough rail space for the addition of your favorite optics, laser and tactical coffee machine.

The gearbox is a high spec V2 industry standard compatible beast with silver coated internal wiring to handle the high current flow with almost zero electrical resistance. That means your battery is going to last longer!

If you are looking to pick up a new AEG that will be one of the best looking and best performing AEG's on the field, be sure to check out the Spartan Delta SX18 M4 AEG Airsoft Gun. You won't regret it.

The rifle comes with a USA spec blaze orange flash-hider fitted to the barrel. You are also supplied with a gun-black metal replacement in 14mm counter-clockwise thread. The orange one is glued on to comply with USA gun Law, so you need to heat it up in boiling water or with a heat gun. There is also a very small grub screw that locks it in place, so make sure you slacken it off or remove it first. Remember it's anti clockwise so you screw it 'on' to remove it, if you get my drift? :)
CODE SP680908
Approx FPS (+/- 5%) 1.4J (388FPS) Max
Approx Range 60m+
Barrel Length 285mm
Magazine Capacity 300rd Hi-cap
Battery Type Mini
Battery Connector Mini Tamiya
Shooting Mode Semi / Fully Automatic
Hop Up Yes
Gun Type Electric
Gearbox Style Version II
Weight (Kg) 3.0000
Spartan Delta SX18 M4 Airsoft Rifle - Full Metal
Excellent mid range platform with good potential for upgrading
Review by
First of all I'd like to say that the customer service from Airsoftworld is top notch!

At the time of ordering there wasn't an option to enter your valid defence whilst adding the item to your basket, a quick phone call to them and an e-mail later this was all sorted. Their staff was very friendly and helpful and made the whole purchase experience well worth it.

The rifle arrived very well packaged and protected.
Upon opening the box I was presented with the rifle and accessories very well laid out in a polystyrene insert.

Straight from the box the rifle comes well put together from the factory, there was no movement from the front end - upper receiver, or the upper and lower receiver. The buffer tube to lower receiver had some wobble / movement but the was quickly rectified by tightening the screw inside the buffer tube. This rifle is Airsoft Spec not Mill Spec.

Disassembly of the upper / lower is as simple as removing the forward pin near the mag well by first unscrewing a hex bolt and pushing out the pin.
The hop up is a one piece metal TM style M4 and the barrel is a generic brass / copper.
The gear box had a few surprises in store for me once it was removed from the lower!
All metal box very well machined, metal bushings, quick change spring guide, all steel gears 18:1 ratio (branded A&K) and shimmed from the factory! Plastic toothed piston with ported piston head, single o-ringed cylinder head, polished cylinder and generic air nozzle.

I haven't had a chance to chrono the rifle yet or use it at a game, but with the quick change spring if this does fire a little hot from the box it won't be a big deal.

All in all I'm really impressed with my purchase and to sum it up;

This is a great mid range all metal rifle that comes with external and internal features / upgrades you would only expect to find by paying at least £50 more from some other manufacture's.
Compatible Batteries
Mini Crane NiMH9.6v 1600mAh Crane£14.50
Mini Crane NiMH8.4v 1600mAh Crane£12.99
Large Crane NiMH8.4v-2200mAh£18.33
Large Crane NiMH9.6v-2200mAh£21.40OOS
Ultra Thin LiPo 7.4v 1300mAh 2Leg£11.95
Mini Crane LiPo 7.4v 2600mAh 2Leg£15.95
Stick LiPo 7.4v 1300mAh£10.95
Mini Life9.9v 750mAh 3L£17.95
Important Information


All images, product contents and specifications listed are based on checks performed when a product is first listed and may differ due to changes over time made by the manufacturer. This includes package contents in regards to any 'extras' provided e.g. Sample BBs.

Items used in images to promote the main item (Holsters, Camo, etc) are not supplied unless listed in the Specification tab under 'Extras'. This includes attached rails, grips, scopes, suppressors etc.

Chinese supplied Batteries and Chargers are warrantied to be not DOA (Dead on Arrival) only. We always recommend swapping out to a better quality Battery and Charger at the earliest opportunity.

Custom Painted products (Two-Tone) are non-refundable as these are painted to order. 

Unless otherwise stated, all products are sold singly.



Any figures used are based on tests performed on the products when they are first listed. These can vary due to changes by the manufacturer, gas pressure, gas used and a number of other factors. All figures should be treated as an approximate guide and used for reference only. 

All listed FPS are +/- 5% due to differences from rifle to rifle. If you require a guaranteed FPS, please add an upgrade/downgrade option on to your product (this may cost extra).

No airsoft AEG is warrantied for use with an 11.1v LiPo or higher voltage battery at UK velocities (373fps or lower) unless specifically recommended on the product itself. Use of higher voltage batteries can cause failures and will negate any warranty implied or otherwise.



We cannot offer an exchange on pyrotechnic devices due to device failure. We are unable to guarantee that the pyrotechnic device has been stored in a moisture free environment or used correctly in accordance with the manufacturers guidelines.

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