S&T M4/AR-15 URX4 11.5" Sports Line AEG; ETU Version

Those in search of a lightweight, affordable and skirmish competitive primary, the S&T M4/AR-15 URX4 11.5" Sports Line AEG; ETU Version is a perfect fit! Made from robust high-density polymer with an alloy outer barrel and a mix of alloy and steel trim parts, this M4 AEG is dressed to impress with an M-LOK handguard and 20mm Picatinny railed receiver, ready for whichever accessories you need to complete your mission.

Inside, the M4/AR-15 URX4 11.5" is generously equipped, boasting a 6.02mm tightbore inner barrel paired with a rotary HOP-up for solid long-range performance, fully upgradeable with TM spec internal parts for those who want more. This, the latest version, is also equipped with an in-line MOSFET and low resistance wiring, preventing lockups in semi-automatic mode and providing a snappy trigger ideal for CQB scenarios. If you're after a new primary which is accessory ready and pre-upgraded with a lightweight and agile external build, the S&T M4/AR-15 URX4 11.5" Sports Line AEG; ETU Version is a great affordable option!

Starting at the tip of the 11.5-inch outer barrel, we can find a birdcage flash hider pre-installed, the classic M4/AR-15 muzzle device. The flash hider looks great and suits the build well, but can be replaced with any other 14mm CCW threaded muzzle device if you prefer a different style, including tracer units and suppressors. The birdcage flash hider is made from polymer and is retained by a grub screw; make sure you remove the grub screw before attempting to unscrew the flash hider.

The handguard is equipped with M-LOK negative space attachment slots at the 3, 6, and 9 o'clock positions, punctuated with additional M-LOK slots at the offset angles, giving you plenty of space to mount M-LOK accessories. M-LOK is one of the latest accessory interfaces to hit the market, both for real steel and Airsoft, allowing you to fit M-LOK vertical or angled grips directly, or mount 20mm Picatinny rail adapters for M-LOK to add 20mm Picatinny accessories. Pre-installed at the front of the handguard, we're treated to three 20mm Picatinny rail adapters which can be used to mount 20mm Picatinny grips, flashlights and laser units or removed entirely for a sleeker look.

With a 20mm Picatinny rail at the 12 o'clock position, the handguard also provides a mounting point for the included flip-up aperture iron sights, which can either be left flipped down or removed entirely if you prefer to use a red dot sight or scope. The irons can be raised and lowered by simply lifting them up or pushing them down, and are fully adjustable for both windage and elevation.

As we come to the receiver of the URX4 9.5", we can take note of its familiar M4/AR-15 style layout, making it an easy transition in terms of training if you're already accustomed to running an AR platform in-game. The charging handle, located at the top rear of the receiver, is a fantastic replica of the real steel milspec M4A1 charging handle, complete with its low-profile latch which reduces snags Pulling the charging handle back will pop open the dust cover, retract the mock bolt carrier and lock it to the rear, ready for HOP-up adjustment.

The rotary HOP-up design is known for allowing finer increments of adjustment for more precise HOP-up application, and holding its setting for longer under the vibrations of full-auto fire. This HOP-up unit is paired with a 6.02mm tightbore inner barrel, giving the URX4 spot-on accuracy right out of the box, with little left to improve. Once you've completed your adjustment, you can hit the "ping pong paddle" style bolt release catch on the centre left of the receiver to close the mock bolt with a satisfying "clank".

The fire selector is of the standard M4/AR-15 layout, with a 3-position selector switch located above the pistol grip on the left side, offering safe, semi-auto and full auto. The selector has a 90-degree throw between each fire mode, allowing the control to be used swiftly while minimising the chances of accidentally knocking the selector out of place. This is one of the most beloved features of AR-15 platforms; it's easy to master, feels great to manipulate and is common to almost every AR, making it easy to switch things up.

The S&T URX4 9.5" features a curved "milspec" style trigger, just like the real thing, keeping the build visually accurate to please realism fans. The pistol grip is the prolific M4A1/M16A2 grip, known as the "A2" finger-ridged grip. This suits the military style build perfectly and is comfortable for a wide variety of hand sizes, but as with most M4/AR-15 AEGs, this grip is compatible with aftermarket M4/AR-15 AEG grips, ideal for customisation addicts!

The magazine release is located on the magazine well on the right side and is well within reach of the trigger finger for right-handed users. This mag catch is right-hand optimised but can be used by lefties as well with a bit of practice. The right side of the upper receiver has the usual M4/AR-15 features, including a mock forward assist button, mock brass deflector and the dust cover which conceals the mock bolt and HOP-up adjuster.

At the rear of the receiver, we are treated to an ambidextrous sling plate which offers two sling points on the left side and one on the right. The sling plate is ideal for single-point slings, but can also be paired with a front sling mount if you prefer a two-point sling setup. Being constructed from steel allows the sling plate to take the weight of the URX4 Sports Line easily, and provides confidence that the plate will never fail and dump your gorgeous rifle into the dirt.

Following the sling plate, we come to the 6-position M4/AR-15 buffer tube, offering 6 length of pull positions so you can adjust to suit your body type and loadout. To adjust the crane stock, simply press the adjustment lever on the bottom and slide it into your position of choice. This allows body armour users to adjust for a comfortable stance and suits shooters of all body types. If you ever feel like changing up the looks of your URX4, you'll be happy to learn the buffer tube accepts almost all M4/AR-15 AEG sliding stocks!

The battery compartment is inside the crane stock, accessible by squeezing the two tabs at the toe of the stock together, after which you can lift the butt plate off, remove the battery plug and make use of the stock's built-in battery compartment to house a nunchuck/crane-style battery. For the S&T URX4 9.5", we recommend a 7.4V 1450mAh LiPo crane/nunchuck battery for an easy fit and great performance.

The Crane stock also includes a pair of QD sling sockets, one on each side, allowing for QD sling swivels to be added for a quick, removable sling setup. Conventional sling slots (aka "footman loops") are also present for those who want a two-point sling but prefer the old-fashioned way. The butt plate is also made from grippy rubber, ensuring your URX4 11.5" doesn't slip off your shoulder at a critical moment.

On the inside, this URX4 build is based on Tokyo Marui's proven M4 AEG design, with an alloy version 2 gearbox with steel 18:1 ratio gears running on 8mm bushings and full compatibility with aftermarket upgrades. A quick-change spring system makes power tuning a breeze, and inside this latest version, we're treated to low-resistance wiring and an in-line MOSFET, improving trigger response significantly and guaranteeing that you never get a lock-up when shooting semi-auto at pace.

A 6.02mm tightbore inner barrel paired with a modern, rotary HOP-up unit gives the CQBR solid performance at long range and great accuracy potential with high-quality ammo. The use of a rotary HOP-up unit should provide ample range, but if you want more, the HOP-up and inner barrel are also compatible with upgrade parts. We cannot deny it, we get a kick out of imagining this full polymer AEG with an HPA engine or other internal wizardry inside, and if you share our fantasy, you can make it happen!

If you like to stay light on your feet and are involved in a mix of CQB and outdoor skirmishes, the S&T M4/AR-15 URX4 11.5" Sports Line AEG; ETU Version suits your needs perfectly. An impressive platform for a remarkable price, S&T has repositioned itself at the head of the pack in the affordable, feature-rich AEG game!

Features

• High-density polymer build - Alloy outer barrel, alloy & steel trim parts
• 6.02mm Tightbore inner barrel - Great accuracy potential
• 14mm CCW Male threaded outer barrel - Tracer/suppressor ready
• Flip-up iron sights pre-installed - Stow and deploy by hand, fully adjustable
• URX4 style M-LOK handguard - 20mm Picatinny rail at 12 o'clock, M-LOK slots at 3, 6, & 9
• 20mm Picatinny rail adapters pre-installed - Mount 20mm accessories or remove for a sleeker look
• 20mm Picatinny railed receiver - Ready for a red dot sight or rifle scope
• Rotary adjustable HOP-up unit - Easy to adjust in fine increments, holds its setting well long term
• "A2" Finger ridged pistol grip - The standard M4A1/M16A2 grip, grippy and comfortable for most hand sizes
• Enlarged trigger guard - Built into the receiver, very strong and plenty of room for gloved use
• 3-Position fire selector switch - SAFE, SEMI AUTO & FULL AUTO, 90-degree throw between each mode
• Ambidextrous CQD-style sling plate - Ideal for single-point slings, great for lefties
• 6-Position M4/AR-15 buffer tube - Adjust the stock quickly and easily to suit your body type or loadout
• Crane Battery Stock pre-installed - Comfortable cheek rest, QD sling sockets and sling slots built-in
• Rear wired: Deans connector - Recommended battery: 7.4V 1450mAh LiPo battery in Crane/nunchuck config.
• Version 2 Gearbox:
  • Alloy shell
  • 8mm bushings
  • Quick change spring system
  • Steel 18:1 ratio gearset
  • In-line MOSFET
  • Low resistance wiring
• Compatible with M4/AR-15 AEG magazines - Spares are cheap and plentiful!

Package Includes

• S&T M4/AR-15 URX4 11.5" Sports Line AEG; ETU Version
• 120rnd Medium-capacity magazine