- High-density polymer build
- 6.03mm Tightbore inner barrel
- Vortex programmable ETU inside
Whether you're new to the sport or seeking an agile and versatile primary for a bargain price, the NUPROL Delta Vanguard Sentry should be in your sights!
Made almost entirely from rock-solid high-density polymer, this M4/AR-15 AEG boasts proven internals with wide compatibility, an advanced electronic trigger unit and an incredibly light, agile build well suited to younger players and fast-moving playstyles.
On the outside, this budget-friendly build boasts an M-LOK handguard, allowing accessories to be fitted wherever you need them. The upper receiver features a 20mm Picatinny rail, ready for a red dot sight or scope. The barrel is also threaded for a tracer unit or suppressor.
Inside, the Sentry is based around the proven Version 2 gearbox design, with an alloy shell, 18:1 ratio steel gears and a quick-change spring guide for easy maintenance. The cutting-edge Vortex ETU provides programmable fire modes like burst modes and binary trigger, and a tightbore inner barrel enhances accuracy with high-quality BBs.
Whether you’re just getting started on your Airsoft adventure or you want to add a lightweight, modern AR to the armoury, you’re well equipped with the NUPROL Delta Vanguard Sentry!
Fast Delivery
Delivery & Postage
Here at Patrol Base, we send all our packages from our Warehouse based in the UK with the exception of European Warehouse Items. All of our parcels are sent with specially picked couriers to ensure your parcels get to you on time and in one piece.
For more information please check out our Delivery Information Page.
Estimates
Below are some rough postage prices for orders. Please note these are subject to change and are only a rough guide. For a more accurate postage estimate please use the Postage Calculator at the basket.
UK 3-5 day Standard
£6.95
From
Dispatched with 24hr UK mainland
£8.95
From
Highlands / Islands
£24.99*
From
* Please note that Scottish Highlands, and Islands postage prices can vary wildly. Please refer to the Postage Calculator at the basket for the lowest possible price.
Returns
We want you to be absolutely happy with our products and services, so we provide the simple Patrol Base guarantee: if on receiving your item you are unhappy with your item for any reason then simply send it back to us. We will replace or refund the item.
You can return any item for any reason whatsoever, even if you have just changed your mind, within 14 days of receipt of the order. This is in addition to your rights under the Consumer Protection (Distance Selling) Regulations 2000.
For more information on returning products, and how to do it please visit our Returns Policy Page.
Description
Quick Start Guide
- Charge your Battery: We recommend a 7.4V 1450mAh LiPo battery for this AEG. Please note: a battery and charger are NOT included with this product. Plug your charger into a 3-Plug UK wall socket and connect the balance connector on your battery to the balance port on your LiPo charger. Your charger will cut off when your battery reaches capacity, but you should never leave it on charge unattended. We recommend using a Battery Safe Charging Bag for charging and storing your battery.
- Fill your speed loader: Open the hatch on the top and pour BBs in. Press the button on the side to deploy the thumb plunger. A speed loader is required to load the included medium-capacity magazine. If you don't have one, find them here: Airsoft Speedloaders
- Load your magazine: Position your speedloader to align with the port on the top of your magazine. Holding the speedloader firmly against the magazine, push the thumb plunger repeatedly until it becomes firm.
- Put on your Eye Protection: Safety when using Airsoft guns should be your number 1 priority. Always wear eye protection before loading your AEG and ensure any spectators are also protected.
- Connect your battery: Remove the butt plate from your stock by extending the stock, pressing the tabs on either side, then lifting it free. Inside the buffer tube, you'll find the Deans connector. Position each of the cell groups of your battery inside the tubes on either side of the stock, then connect the Deans connectors. With your wiring neatly tucked in, replace the butt plate.
- Insert your magazine: With the fire selector switch set to "SAFE" and the barrel pointed in a safe direction with your finger off the trigger, insert your magazine by pushing it up into the magazine well.
- You're now ready to shoot! - Never shoot at animals or humans who aren't in an Airsoft skirmish
- If you want to program the Vortex ETU for different fire modes, check out the included programming instructions card.
About the Delta Vanguard M4/AR-15 Sentry AEG
Starting at the tip of the alloy outer barrel, we are met with an alloy birdcage flash hider with 14mm CCW male threading beneath. The common 14mm CCW male threading allows alternative flash hiders, tracers or suppressors to be mounted, a key feature for customisation.
After the flash hider, we come to the M-LOK handguard, equipped with a 20mm Picatinny rail on top and M-LOK attachment slots at the 3, 6, and 9 o'clock positions. This means you can add 20mm Picatinny accessories to the top, and M-LOK accessories to the bottom and sides, should the mission require.
The receiver also features a 20mm Picatinny rail, allowing red dot sights or scopes to be mounted with ease. The Sentry has a set of fully adjustable polymer flip-up aperture iron sights pre-installed on this rail. To flip them up, press the tab at the rear of either sight, and they will spring into place instantly. These can either serve as primary sights or be removed, as they are rail-mounted.
Next up, we reach the receiver, matching the popular M4/AR-15 rifle in terms of the controls and shape. The magazine release is on the right side of the magazine well and is accessible for a right-handed user with their trigger finger or by a lefty using their off-hand thumb.
The fire selector lever can be found just above the pistol grip, on the left side of the AEG, providing 3 modes of fire: SAFE, SEMI, and AUTO, with a 90-degree throw between each.
Pulling back the extended charging handle at the rear of the receiver provides access to the rotary HOP-up adjuster. The HOP-up allows you to adjust the amount of backspin applied to your BBs and extend range with heavier ammo, seeking the flattest possible trajectory.
The pistol grip is an M16A2/M4A1 style pistol grip, featuring diamond checkering on either side and linear texture on the back to provide excellent gripping qualities, whether you wear gloves or not. The finger ridge helps you keep hold of the rifle when held in a single hand.
At the rear, the Sentry is equipped with a unique A-frame stock with a quick-access battery compartment. The stock also features a pair of QD sling sockets, one on each side, allowing QD sling swivels to be fitted. Conventional sling slots are also present for those who prefer the old-fashioned way.
The adjustment lever is in the centre of the A-frame shape. To adjust the stock to any of the 6 adjustment positions, hold the lever down and slide the stock into your position of choice. This means you can adjust to suit your body type and any tactical gear you're wearing.
The butt plate is made from grippy rubber with a serrated design, ensuring your Sentry doesn't slip off your shoulder at a critical moment. If you decide you want a change or prefer another stock design, you'll be pleased to learn you can swap this stock for any M4/AR-15 AEG sliding stock to customise your build.
Features
- High-density polymer build - Alloy outer barrel & buffer tube
- Available in Pre Two-tone Blue - No UKARA/Defence required
- 6.03mm Tightbore inner barrel - Great accuracy potential
- Vortex MOSFET/ETU Pre-installed - Programmable fire modes
- Bird cage style flash hider - Suits the M4/AR-15 build perfectly
- 14mm CCW Male threaded outer barrel - Tracer/suppressor ready
- M-LOK handguard - Ready for M-LOK accessories or 20mm rail adapters for M-LOK
- Flip-up aperture iron sights pre-installed - Adjustable for windage and elevation, 2 apertures to choose from
- 20mm Picatinny railed receiver - Ready for red dot sights, PEQ lasers or scopes to be mounted
- Rotary adjustable HOP-up unit - The latest M4/AR-15 design, holds its setting well and allows for fine adjustment
- Finger-ridged "A2" pistol grip - Comfortable for most hand sizes, textured for extra traction
- Enlarged trigger guard - Allows extra space for easy access to the trigger with full finger gloves
- Flat trigger - Great for rapid double taps and semi-auto fire
- 3-Position fire selector switch - SAFE, SEMI AUTO & FULL AUTO, 90-degree throw between each mode
- 6-Position M4/AR-15 buffer tube - Adjust the stock quickly and easily to suit your body type or loadout
- A-Frame stock pre-installed - Quick access battery compartment, QD sling sockets built-in
- Rear wired: Deans battery connector - Recommended battery: 7.4V 1450mAh LiPo
- Version 2 Gearbox:
- Alloy shell
- 8mm bushings
- Quick-change spring system
- Steel 18:1 ratio gearset
- Vortex Programmable ETU/MOSFET
- Vortex MOSFET functions:
- Semi-auto only
- 2-round Burst
- 3-round Burst
- 4-round Burst
- 5-round Burst
- Binary trigger
- Compatible with M4/AR-15 AEG magazines - Plenty of spare mag options!
Suggested accessories
- Recommended Battery: 7.4V 30C 1450mAh LiPo Stick Battery (Deans)
- Recommended Charger: NUPROL LiPo/ LiFe/ NiMh Balance Charger | Battery Safe Charging Bag
- Spare Magazines: Steel Mid-cap Magazine [VIDEO] | Steel High-cap Magazine [VIDEO]
- Red Dot Sight & Lens Protector: Evike Spec Ops Multi-Reticle Open Reflex Red Dot Sight | HASTA Lens Protector
- Front Grips: Specna Arms SAAS Angular Foregrip| CYMA M-LOK Foregrip & Handstop| M-ETAL TD Halo Hand Stop
- Tactical Flashlights: WASDN V600 Scout Flashlight | Vector Optics Cyclops Vertical Grip Flashlight
Package Includes
- NUPROL Delta Vanguard M4/AR-15 Sentry AEG
- 120rnd Mid-cap magazine
Specification
 | No |
|---|
General
 | Assault Rifle |
|---|---|
 | Yes |
 | No, Yes, |
 | Yes |
 | Magazine |
 | Beginner Player |
 | Li-Po Li-Po - Never Leave Charging Unattended Li-Po - Only Use Approved Chargers Li-Po - Charge in a Fire Safe Area |
Testing
 | Approx.320fps ± 10%, using 0.20g BBs |
|---|---|
Testing Notes | Tested using 0.20g Delta Armory Diamond BBs |
Weight and Dimension
 | Approx.1.96KG, Approx.2.1KG, Approx.2.16KG, |
|---|---|
 | 64.6cm, 70cm, 79.4cm, |
 | 73cm, 78cm, 87.6cm, |
Construction
 | Black, Pre Two-Tone Blue, |
|---|---|
 | Yes, No, |
 | Alloy outer barrel, flash hider, buffer tube & trim parts. Steel sling plate, body pins & dust cover. High density polymer handguard, stock, pistol grip & stock. Rubber butt plate |
Weapon Specific
 | Electric |
|---|---|
 | M4 / AR-15 / M16 |
 | M4/AR-15 AEG Magazines |
 |    Programmable |
 | Trigger Lock |
 | Right Handed |
 | Standard |
 | 1:1 |
 | 0.25g |
Hop-Up
 | Rotary |
|---|---|
 | Inside the ejection port, accessible with the charging handle pulled and held back. |
Furniture
 |
|
|---|---|
 | 20mm RIS / RAS, 20mm Railed Receiver, M-LOK, |
 | Sliding, Multi-Position, |
| 6 |
 | Aperture Iron Sight |
 | Buffer Plate, Stock, Handguard, QD, Loop, |
Barrel
Outer Barrel Length (in) | 8.5'', 10'', 14.5'', |
|---|---|
 | Male |
 | CCW (Counter Clockwise) |
 | 14mm |
 | 6.03mm |
 | 230mm, 260mm, 363mm, |
Magazine Specific
 | AEG, Medium Capacity, |
|---|---|
 | Approx.120Rounds |
Electric Gun Specific Information
Gearbox
 | V2Gearbox |
|---|---|
 | Rear Wired |
 | Yes |
 | Yes |
Motor
 | Standard |
|---|
Battery Specific
 | 7.4V |
|---|---|
 | Li-Po |
 |  |
 | Stick configuration |
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.
This table should be used for reference, and cannot be used to check one weight against another, as the weight of the BB affects the power.
In order to check if the BB can be used with your replica chronograph using the weight you wish to use and then compare it against the table.
Every time you change weights you will need to re-chrono and check against the table. This is not a conversion chart between weights.
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 |