Rossi L119A2 Neptune SAS 10.5" AEG with MOSFET

Code:
355.49
  • Full metal construction
  • 6.02mm Tightbore & programmable MOSFET
  • L119A2 Replica - Ideal for SAS/UKSF loadouts

If you're working on an L119A2 build for your SAS/UKSF loadout, why bother? The Rossi L119A2 Neptune SAS 10.5" AEG with MOSFET is a fantastic replica of the real steel L119A2 boasting full metal construction, a programmable MOSFET/ETU system and pre-upgraded internals, all assembled and ready to rock with no compatibility worries and no technical headaches!

Externally, the Rossi L119A2 is a very close match for the real thing, with the only compromise being its non-monolithic receiver design. The real thing has a monolithic upper, but the only available Airsoft replicas have a four-figure price tag and come as a kit, requiring a lot of technical expertise and other parts to complete the build. 

With the Rossi L119A2, you are treated to some impressive stuff on the inside as a bonus. The version 2 gearbox shell is reinforced and equipped with 16:1 high-speed CNC steel gears, a ball bearing equipped quick change spring guide, a CNC aluminium nozzle, a polymer piston with a full steel tooth rack and a ball bearing piston head, resulting in top-notch reliability, improved rate of fire and easy spring changes for power tuning. The pre-installed MOSFET makes thing even sweeter, offering a wealth of programmable fire mode options, adjustable pre-cocking and trigger sensitivity with active braking to top it off. 

If you want the Obiwan Nairobi look for your next skirmish, the Rossi L119A2 Neptune SAS 10.5" AEG with MOSFET is the primary you need!

Full description

Description

If you're into the UKSF look and you're seeking a new primary, the Rossi L119A2 Neptune SAS 10.5" AEG with MOSFET is exactly what you need. Based on the real steel Demaico/Colt Canada L119A2 used by the SAS, SBS and SRR, the Rossi AEG finally makes L119A2 ownership affordable in Airsoft terms, proving a solid, pre-built replica with superb build quality and thoroughly pre-upgraded internals on the inside. 

The reinforced version 2 gearbox is rocking 16:1 CNC steel high-speed gears, a ball bearing quick change spring guide, an aluminium nozzle with O-ring, a polymer piston with a full steel tooth rack and a ball bearing piston head, giving you the speed to compete and the reliability for a long lifespan. 

The pre-installed MOSFET in this, the latest generation of Rossi L119A2 provides loads of programmable functions, rivalling the best ETUs currently out there. These include 3 or 5 round burst, semi-auto only, binary trigger, adjustable pre-cocking and trigger sensitivity, AUG mode, sniper delay and active braking. All MOSFET functions can be accessed via the trigger and fire selector of the AEG, meaning no firmware updates and no hidden costs down the line! 

Starting at the front, we can find an SF-style tri-prong flash hider mounted to 14mm CCW male threads at the tip of the alloy outer barrel. The tri-prong replica gives you a head start on making your L119A2 look "issued", matching L119A2's seen in the wild well. If you fancy a sneaky look for your L119A2, we suggest the 5KU USSOCOM 5.56 SF Spitfire Tracer Sound Suppressor as it is a very close match for the suppressor issued with the real thing, though the 14mm CCW threading means you can mount practically any flash hider, suppressor or tracer you desire!

Next up, we arrive at the handguard which, while not monolithic, is a fantastic replica of the real thing, patterned after the Angry Gun L119A2 rail. 20mm Picatinny rails are present at the 3, 6, 9 and 12 o'clock positions with the iconic L119A2 relief cuts running along either side. The rails are well placed for mounting accessories, with short lengths at the front on each side for flashlights or lasers and a single slot close to the receiver, ideally placed for a sling point. The top and bottom sport full-length rails, providing plenty of space to position a vertical or angled grip where you prefer and fit optical sights of practically any length without the setup becoming cramped. 

The upper rail of the handguard meets the receiver's 20mm Picatinny rail seamlessly, mimicking the monolithic upper of the real L119A2 well without pumping costs up too high. The receiver itself follows the standard M4/AR-15 layout, 

The charging handle is located at the top rear of the receiver and is an extended design similar to the real L119A2 charging handle but not a perfect match. Pulling the charging handle back will pop open the steel dust cover, reveal the steel mock bolt carrier and retract it to allow access to the rotary HOP-up unit. The rotary HOP-up unit is the latest design for M4/AR-15 platforms, benefitting over the older "gear" style unit in its ability to hold its setting under vibration and be adjusted in finer increments. 

This rotary HOP-up also has some other tricks in store, including a pre-installed Maple Leaf OMEGA Delayer nub and Super Macaron HOP-up bucking, saving you time if you're the type who always upgrades their HOP-ups and giving you more accuracy than you deserve if not!

The fire selector switch is located on the left side of the receiver, just above the pistol grip and is a standard M4A1 mil-spec design with a textured surface for optimal traction in wet weather. The selector provides 3 modes of fire; safe, semi-automatic and fully automatic, with a 90-degree throw between each mode. Being equipped with a programmable MOSFET, the Rossi L119A2 can also be set up for semi-auto only, 3 or 5-round bursts, binary trigger, sniper delay and two-stage trigger aka AUG mode. 

The magazine release button is over on the right side of the magazine well, a standard M4/AR-15 push button release but compatible with aftermarket ambidextrous alternatives. The button is surrounded by a raised protrusion in the receiver, known as the "magazine release fence" and designed to prevent the mag release from accidentally being pressed as the L119A2 rubs against your gear. Another great aspect of the AR-15 design, the magazine release is easily accessible from a firing grip, making for scorchingly fast reloads as long as you practice!

At the rear of the receiver, we come to the steel CQD style sling plate, which offers ambidextrous functionality with single-point slings; perfect for left or right-handed shooters. The steel construction of the sling plate practically guarantees even if you mount a massive rifle scope, PEQ box and RunCam, the sling plate will be strong enough to support the weight. Following the sling plate, we come to the good old AR buffer tube, constructed from alloy and offering 6 adjustment positions for the pre-installed stock, or any other M4/AR-15 AEG stock you choose to mount!

The stock itself is an A-frame design, similar to popular real steel stocks seen on the real thing but visually distinct in certain areas. The butt plate is angled and constructed from rubber for optimal grip for plate carrier users and the adjustment lever is concealed inside the A-frame design, keeping it well out of the way of snags. A QD sling socket is present on either side, ready for a QD sling swivel, together with conventional "footman loops", aka sling slots designed for strap slings. 

The buffer tube serves as the battery compartment of the Rossi L119A2 and is accessible with the A-frame stock removed. To achieve this, simply pull the adjustment lever pin outwards and hold it in place, after which the stock can be slid off the rear of the buffer tube. Inside, you will find a Deans battery connector to which you mount your choice of battery. We recommend a 7.4V 1450mAh LiPo battery in stick configuration for easy installation. 

Inside the reinforced version 2 gearbox we are treated to CNC 16:1 ratio steel gears running on 7mm ball bearing bushings, a polymer piston with a full rack of steel teeth, a CNC aluminium nozzle with an air seal enhancing O-ring, ball bearing equipped piston head, and quick change ball bearing spring guide. This gets you off to a flying start when it comes to performance, but it gets even better!

The HOP-up unit is equipped with the Maple Leaf OMEGA Delayer Nub, a flat HOP-style nub designed to increase range and accuracy. The OMEGA is paired with the Maple Leaf Super Macaron HOP-up rubber, a high-quality HOP-up rubber known for the tight groupings it provides. With a 6.02mm tightbore inner barrel thrown into the mix, the Rossi L119A2 hits out hard at range, with far more accuracy than one might expect for a short-barrelled AR platform!

Also present inside is a programmable ETU/MOSFET system, offering a wide variety of fire mode options along with adjustable pre-cocking, adjustable trigger sensitivity and the option to use active braking to prevent overspin. Fire mode options include 3 or 5-round burst, binary trigger, semi-auto only, AUG mode and sniper delay, all of which can be programmed in using the trigger and fire selector switch. This is very impressive for a full metal AR platform in this price range, even more so given that it is an L119A2!

If your UKSF loadout needs a primary to finish it off or you collect British Army rifle replicas and need the special forces tool of choice to complete the arsenal, the Rossi L119A2 Neptune SAS 10.5" AEG with MOSFET is a beast on the field and looks fantastic to boot. If only this bad boy was out before we all spent our money on Angry Gun L119A2 parts!

Features

  • Full metal construction
  • 6.02mm Tightbore inner barrel - Awesome accuracy potential 
  • Programmable MOSFET Pre-installed - Adjustable pre-cocking, burst, binary, semi-only etc.
  • 14mm CCW Male threaded outer barrel - Ready for a tracer or suppressor, here is our favourite
  • SF-style Tri-prong flash hider - Well suited to the L119A2 build, often seen on the real thing
  • L119A2 Style Quad 20mm Picatinny handguard - 20mm rails at 3, 6, 9 & 12 o'clock, relief cuts in the centre
  • 20mm Picatinny railed receiver - Ready for a red dot sight or scope
  • Rotary adjustable HOP-up unit - Maple Leaf OMEGA Delayer Nub & Super Macaron bucking pre-installed
  • Flip-up iron sights pre-installed - Adjustable for windage and elevation, two rear apertures to aim with
  • Finger-ridged "A2" pistol grip - Comfortable for most hand sizes, checkering on either side
  • Ambidextrous sling plate - Steel construction, ready for a single-point sling
  • 6-Position M4/AR-15 buffer tube - Compatible with aftermarket AR stocks, adjust length of pull to suit you
  • A-frame stock pre-installed - Low profile adjustment lever, rubber butt plate, QD sling sockets on each side
  • Rear wired: Deans battery connector - Recommended Battery: 7.4V 1450mAh LiPo Stick Battery
  • Reinforced Version 2 gearbox:
    • Quick change ball bearing spring guide
    • 16:1 High-Speed CNC Steel Gear set
    • Polymer piston with full steel tooth rack
    • CNC Aluminium nozzle with O-ring
    • Ball bearing piston head
  • Programmable MOSFET functions:
    • 3 Or 5 round burst
    • Semi-auto only
    • Binary Trigger
    • AUG mode
    • Sniper delay
    • Adjustable trigger sensitivity
    • Adjustable pre-cocking
    • Active braking on/off
  • Compatible with M4/AR-15 AEG magazines - Plenty of spares available

Package Includes

  • Rossi L119A2 Neptune SAS 10.5" AEG with MOSFET
  • 120rnd Mid-cap magazine x 2

Specification

General

Weapon Construction External
Weapon Type
Assault Rifle
Over 18 Only Icon
Over 18
Yes
Icon UKARA - United Kingdom Airsoft Retailer Association
Defence / UKARA Required
Yes, No,
FPS Icon
FPS (Feet Per Second), using 0.20g BB
Approx. 310fps ± 10%, using 0.20g BB
Site Legal Icon
Site Legal, using 0.20g BB
Yes
Screwdriver Icon
Pre-Built
Yes
Package
Included Items
Magazine x 2
Skill Level Icon
User Skill Level
Starter, Regular Player,
Patrol Base - Warning Icon
Warnings
Li-Po - Never Leave Charging Unattended
Li-Po - Only Use Approved Chargers
Li-Po - Charge in a Fire Safe Area

Weight and Dimension

Weight KG Icon
Weight (KG)
Approx. 2.335kg
Weapon Length Collapsed
Length (Collapsed)
71cm
Weapon Length Extended
Length (Extended)
79.5cm

Construction

Colour Wheel Greyscale
Primary Colour
Black
Construction Icon
Construction
Steel dust cover, mock bolt, sling plate, body pins & trim parts. CNC Aluminium handguard. Alloy outer barrel, receiver, buffer tube & trigger guard. High density polymer stock & pistol grip.
Weapon Construction External
External Construction
Polymer
Alloy
Aluminium
Steel
Gearbox Icon
Internal Construction
Polymer
Alloy
Aluminium
Steel

Weapon Specific

Power Source Icon
Powered By
Electric
Blowback Icon
Blowback
None
Weapon Platform
AR, M4 / AR-15 / M16, Assault Rifle, M4/AR-15 AEG,
Magazine Style Icon
Magazine Style
Long Gun Magazine, Assault Rifle, M4 / AR Platform,
Fire Select Icon
Fire Selector
PatrolBase | Fire Select Safe
Safe
Patrol Base | Fire Select - Semi Automatic
Semi Automatic
Patrol Base | Full Automatic
Full Automatic
Programmable
Weapon Safety Features Icon
Safety Features
Trigger Disconnect
Shooter Configuration Icon
Shooter Configuration
Right Handed
Weapon Configuration Icon
Weapon Configuration
Standard
Weapon Scale Icon
Weapon Scale
1:1
Suggested BB Weight
0.25g

Hop-Up

Hop-Up Unit Icon
Hop-Up Unit
Yes
Hop-Up Unit Adjuster Icon
Hop-Up Adjuster
Rotary
Hop-Up Unit Location Icon
Hop-Up Location
Behind the mock bolt carrier, accessible when the charging handle is pulled and held to the rear.

Furniture

Weapon Furniture Icon
Furniture
  • Railed Handguard
  • Flip-Up Ironsights
  • AR Buffer Tube
  • Railed Receiver
  • Finger Ridged Pistol Grip
  • Sliding Stock
  • Threaded Outer Barrel
  • QD Sling Point
  • Ambidextrous Sling Plate
  • Extended Charging Handle
  • Sling point on stock
  • Flat trigger
  • Three-prong Flash Hider
  • Rubber butt plate
Rail System Icon
Rail System
20mm RIS / RAS , 20mm Railed Receiver,
Icon Stock Positions
Stock Setting
Sliding , Multi-Position ,
Weapon Length Extended
Stock Positions
6 Position
Sight Type Icon
Sight Type
Iron Sights , Aperture Iron Sight,
Sling Plate Icon
Sling Options
Buffer Plate , Stock , QD , Loop ,

Barrel

Outer Barrel Length (in)
10.5''
Icon Thread Type
Outer Barrel Thread Type
Male
Icon Thread Direction
Outer Barrel Thread Direction
CCW (Counter Clockwise)
Outer Barrel Thread Size
14mm
Inner Barrel Diameter
6.02mm
Inner Barrel Length
260mm

Magazine Specific

Magazine Type
Medium Capacity , AEG,
Magazine BB Capacity
Approx. 120 Rounds
Magazine BB Fill Method
Speed Loader
Magazine BB Fill Location
Top

Electric Gun Specific Information

Gearbox
Gearbox Icon
Gearbox Version
V2 Gearbox
Wiring Icon
Gearbox Wiring
Rear Wired
Spring Change Icon
Gearbox Quick Change Spring
Yes
Digital Trigger Icon
Gearbox Electronic Trigger
Yes
Split Gearbox Icon
Split Gearbox Design
No
Motor
Airsoft Motor Icon
Motor Type
Standard
Battery Specific
Battery Connector
Patrol Base | Icon | Deans
Deans
Compatible Battery
Compatible Battery Type
Li-Po
Compatible Battery Configuration
Stick
Compatible Battery Voltage
7.4v

Product Testing Data

Notepad Icon
Test Description
310 FPS +/- 10%
Notepad Icon
Tested Using
0.2g ASG BLASTER BBs
Notepad Icon
Test Date
16/05/2024

Size guide

Joule Charts

Special Instructions

These table can be used as a reference to see if the BB weight you are using will be over acceptable Joulage limits at some Airsoft Sites in the UK. To check if the weight can be used chrono your weapon using the BB you intend to use, and then compare it to the chart.

FPS, Power and Joule Limits can vary from site to site, so please get in touch with where you're going to play with in advance to avoid disappointment.

Suggested limits are based on Joulage Limit rules used Halo Mill: Proving Grounds, with a 350fps limit for Automatic Replicas, 400fps for Semi-Automatic Replicas, and 500fps for Bolt Action Replicas.

Tap the tabs below to open the relevant chart for your replica.

Suggested limits are based on Joulage Limit rules used Halo Mill: Proving Grounds, and is the equivalent of 350fps, using 0.20g BB resulting in an upper limit of 1.14j.

Velocity BB Weight (Grams)
FPS 0.20 0.25 0.28 0.30 0.32 0.36 0.40 0.43 0.45 0.50
250 0.58 0.73 0.81 0.87 0.93 1.05 1.16 1.25 1.31 1.45
260 0.63 0.79 0.88 0.94 1.00 1.13 1.26 1.35 1.41 1.57
270 0.68 0.85 0.95 1.02 1.08 1.22 1.35 1.46 1.52 1.69
280 0.73 0.91 1.02 1.09 1.17 1.31 1.46 1.57 1.64 1.82
290 0.78 0.98 1.09 1.17 1.25 1.41 1.56 1.68 1.76 1.95
300 0.84 1.05 1.17 1.25 1.34 1.51 1.67 1.80 1.88 2.09
310 0.89 1.12 1.25 1.34 1.43 1.61 1.79 1.92 2.01 2.23
320 0.95 1.19 1.33 1.43 1.52 1.71 1.90 2.05 2.14 2.38
325 0.98 1.23 1.37 1.47 1.57 1.77 1.96 2.11 2.21 2.45
328 1.00 1.25 1.40 1.50 1.60 1.80 2.00 2.15 2.25 2.50
330 1.01 1.26 1.42 1.52 1.62 1.82 2.02 2.18 2.28 2.53
335 1.04 1.30 1.46 1.56 1.67 1.88 2.09 2.24 2.35 2.61
340 1.07 1.34 1.50 1.61 1.72 1.93 2.15 2.31 2.42 2.68
345 1.11 1.38 1.55 1.66 1.77 1.99 2.21 2.38 2.49 2.76
350 1.14 1.42 1.59 1.71 1.82 2.05 2.28 2.45 2.56 2.85
355 1.17 1.46 1.64 1.76 1.87 2.11 2.34 2.52 2.63 2.93
360 1.20 1.51 1.69 1.81 1.93 2.17 2.41 2.59 2.71 3.01

Suggested limits are based on Joulage Limit rules used at Halo Mill: Proving Grounds, and is the equivalent of 400fps, using 0.20g BB resulting in an upper limit of 1.49j.

Velocity BB Weight (Grams)
FPS 0.20 0.25 0.28 0.30 0.32 0.36 0.40 0.43 0.45 0.50
250 0.58 0.73 0.81 0.87 0.93 1.05 1.16 1.25 1.31 1.45
260 0.63 0.79 0.88 0.94 1.00 1.13 1.26 1.35 1.41 1.57
270 0.68 0.85 0.95 1.02 1.08 1.22 1.35 1.46 1.52 1.69
280 0.73 0.91 1.02 1.09 1.17 1.31 1.46 1.57 1.64 1.82
290 0.78 0.98 1.09 1.17 1.25 1.41 1.56 1.68 1.76 1.95
300 0.84 1.05 1.17 1.25 1.34 1.51 1.67 1.80 1.88 2.09
310 0.89 1.12 1.25 1.34 1.43 1.61 1.79 1.92 2.01 2.23
320 0.95 1.19 1.33 1.43 1.52 1.71 1.90 2.05 2.14 2.38
330 1.01 1.26 1.42 1.52 1.62 1.82 2.02 2.18 2.28 2.53
340 1.07 1.34 1.50 1.61 1.72 1.93 2.15 2.31 2.42 2.68
350 1.14 1.42 1.59 1.71 1.82 2.05 2.28 2.45 2.56 2.85
360 1.20 1.51 1.69 1.81 1.93 2.17 2.41 2.59 2.71 3.01
370 1.27 1.59 1.78 1.91 2.03 2.29 2.54 2.73 2.86 3.18
380 1.34 1.68 1.88 2.01 2.15 2.41 2.68 2.88 3.02 3.35
390 1.41 1.77 1.98 2.12 2.26 2.54 2.83 3.04 3.18 3.53
400 1.49 1.86 2.08 2.23 2.38 2.68 2.97 3.20 3.34 3.72
410 1.56 1.95 2.19 2.34 2.50 2.81 3.12 3.36 3.51 3.90

Suggested limits are based on Joulage Limit rules used at Halo Mill: Proving Grounds, and is the equivalent of 500fps, using 0.20g BB resulting in an upper limit of 2.32j.

Velocity BB Weight (Grams)
FPS 0.20 0.25 0.28 0.30 0.32 0.36 0.40 0.43 0.45 0.50
250 0.58 0.73 0.81 0.87 0.93 1.05 1.16 1.25 1.31 1.45
260 0.63 0.79 0.88 0.94 1.00 1.13 1.26 1.35 1.41 1.57
270 0.68 0.85 0.95 1.02 1.08 1.22 1.35 1.46 1.52 1.69
280 0.73 0.91 1.02 1.09 1.17 1.31 1.46 1.57 1.64 1.82
290 0.78 0.98 1.09 1.17 1.25 1.41 1.56 1.68 1.76 1.95
300 0.84 1.05 1.17 1.25 1.34 1.51 1.67 1.80 1.88 2.09
310 0.89 1.12 1.25 1.34 1.43 1.61 1.79 1.92 2.01 2.23
320 0.95 1.19 1.33 1.43 1.52 1.71 1.90 2.05 2.14 2.38
330 1.01 1.26 1.42 1.52 1.62 1.82 2.02 2.18 2.28 2.53
340 1.07 1.34 1.50 1.61 1.72 1.93 2.15 2.31 2.42 2.68
350 1.14 1.42 1.59 1.71 1.82 2.05 2.28 2.45 2.56 2.85
360 1.20 1.51 1.69 1.81 1.93 2.17 2.41 2.59 2.71 3.01
370 1.27 1.59 1.78 1.91 2.03 2.29 2.54 2.73 2.86 3.18
380 1.34 1.68 1.88 2.01 2.15 2.41 2.68 2.88 3.02 3.35
390 1.41 1.77 1.98 2.12 2.26 2.54 2.83 3.04 3.18 3.53
400 1.49 1.86 2.08 2.23 2.38 2.68 2.97 3.20 3.34 3.72
410 1.56 1.95 2.19 2.34 2.50 2.81 3.12 3.36 3.51 3.90
420 1.64 2.05 2.29 2.46 2.62 2.95 3.28 3.52 3.69 4.10
430 1.72 2.15 2.40 2.58 2.75 3.09 3.44 3.69 3.86 4.29
440 1.80 2.25 2.52 2.70 2.88 3.24 3.60 3.87 4.05 4.50
450 1.88 2.35 2.63 2.82 3.01 3.39 3.76 4.04 4.23 4.70
460 1.97 2.46 2.75 2.95 3.15 3.54 3.93 4.23 4.42 4.91
470 2.05 2.57 2.87 3.08 3.28 3.69 4.10 4.41 4.62 5.13
480 2.14 2.68 3.00 3.21 3.42 3.85 4.28 4.60 4.82 5.35
490 2.23 2.79 3.12 3.35 3.57 4.02 4.46 4.80 5.02 5.58
500 2.32 2.90 3.25 3.48 3.72 4.18 4.65 4.99 5.23 5.81
510 2.42 3.02 3.38 3.62 3.87 4.35 4.83 5.20 5.44 6.04