Finish Build

Add Essentials

Select from the compatible essentials you need from the list below.

Choose your warranty to complete checkout

Weapon Shield 90

  • EXTENDED Industry Leading 90 Day parts and defects warranty
  • Covers for all repair work
  • Comprehensive Tech Support
  • Priority processing time, Ships within 1 business days
  • Shipping Insurance
Add & Checkout

Weapon Shield Extended 135

  • TRIPLE EXTENDED Industry Leading 135 Day parts and defects warranty
  • Covers for all repair work
  • Comprehensive Tech Support
  • Priority processing time, Ships within 1 business days
  • Shipping Insurance

+ Tech Inspection

  • FPS Chronograph Certification
  • Gearbox Cleaning
  • Gearbox Lubrication
  • Fuse Replacement
Add & Checkout

AMS Standard 45

  • Industry Leading 45 Day parts and defects warranty
  • Covers for all repair work
  • Comprehensive Tech Support
  • Standard processing time, 1-2 business days

AMS Proshop Warranty Options

Airsoft Megastore is proud offer our customers the most comprehensive warranty options in the industry. Orders are processed within our standard 1-2 business days from the date of purchase and shipped out with your selected shipping method (chosen at checkout). All accessories and upgrade parts are shipped within their manufacturer's packaging, to best protect each part during shipping. Upon arrival, the player will need to easily attach their own parts. Please be careful not to void your warranty by opening your gearbox, or damaging any of the accessories, as they are not covered under any warranty.

We suggest that anyone investing in a gun from our custom proshop purchase a weapon shield protection plan. There's no sense in spending your hard earned cash on something this awesome and then be at the mercy of the manufacturer's limited parts warranty. Purchase a weapon shield plan, 90 or 135 day plans to protect your airsoft investment. Our 135 day plan includes an inhouse tech service that you have 135 days to use. Our techs will do a clean up that should keep your airsoft investment running like the day you got it. All Weapon shield customers are prioritized for order processing as well as other services. Join the our satisfied Weapon Shield customers today!

Customize It!
On Sale: Ending Soon!
product image

NcStar 3-9x42 Full Metal Tactical 3-Rail Sighting System (3RS) Scope

Get Free Shipping

  1. 1. Buy Any Regular Priced Item
  2. 2. or, Buy Any Sale Item + Any Non-Sale Item
  3. 3. or, Any Order Over $150
Free Shipping
$67.95Guaranteed Lowest
customize it!

3 Ways to get Free Shipping

  1. 1. Buy Any Regular Priced Item
  2. 2. or, Buy Any Sale Item + Any Non-Sale Item
  3. 3. or, Any Order Over $150
Free ShippingThis item qualifies for Free Shipping
  • Details
  • Ratings & Reviews

Our take:  The NcStar 3-9x42 Mil-Dot Tactical 3-Rail Sighting System is a unique, versatile, and durable sighting system, designed for mission adaptability.  Providing a crystal clear view with comfortable eye relief, the NcStar 3-Rail Sighting System allows you to easily and effectively engage your targets. This scope also features an adjustable 3-9x power zoom, mil-dot cross-hairs and a sturdy 20mm rail mounting system. What sets this tactical scope apart from other optics on the market is the incredible amount of integrated rail space, allowing you to customize the scope to suit your needs.  The tri-rail system, integrated onto the mount housing of the scope, is constructed from rugged anodized, aircraft grade aluminum, making this NcStar Tactical 3-Rail Sighting System Scope nearly indestructible.  If you want to increase the modular capability of your airsoft rifle and give it a unique tactical look, the adjustable magnification 3-Rail Sighting System is the perfect scope for you!

Durability, clarity, and ease of use are the three most  important factors to consider when looking for a tactical optic for your airsoft rifle.  Built to withstand even the most strenuous airsoft games, the NcStar 3-Rail Sighting System features an anodized aluminum scope housing and mounting system, providing maximum structural stability and integrity.  The blue tinted 42mm objective lens is designed to offer a crystal clear, unobstructed and glare free view, allowing you to easily see your targets and track your shots.  With an easy to use adjustable magnification dial, you can quickly and easily transition from medium to long range targets.  These features combined make one of the most tactically efficient airsoft optics on the market.

Completely customizable with over 16 3/4" inches of combined rail space, the NcStar 3-Rail Sighting System is perfect for any type of combat or target shooting environment.  The integrated rial space allows you to easily attach a wide variety of additional accessories such as close quarters red dot sights, flashlights, lasers, and more!  This scope is the perfect addition to any airsoft rifle that does not come equipped with an integrated rail system, providing ample room to further customize your airsoft gun.  Most full metal railed adjustable magnification optics featuring this level of performance cost well over $100!  Don't miss out on this amazing deal on one of the most combat effective and customizable scopes on the market!
NcStar x Airsoft Megastore
As a premier authorized NcStar distributor, Airsoft Megastore offers the LOWEST PRICES you will ever find on the market on ALL high-quality NcStar products, backed of course by our 125% lowest price guarantee. And because we ALSO service and honor NcStar's lifetime warranty, there's no better place to buy all your NcStar gear and optics than Airsoft Megastore!

Limited Lifetime Warranty
NcStar stands behind every product they manufacture. ALL NcSTAR PRODUCTS carry a limited LIFETIME warranty, serviceable directly through NcStar customer support or through Airsoft Megastore. It's one of the best warranties in the business, and affirms the extremely high level of quality of all NcStar products.

- Fully multi-coated lenses
- Quick focus eyepiece
- 16 3/4" inches of combined rail space
- Manufactured from aircraft grade anodized aluminum
- P4 Mil-Dot specification Cross Hairs
- 20mm Universal Weaver Rail QD mount base
- Durable high grade construction, made of aircraft grade Anodized Aluminum
- Fully compatible with most-all rails (20mm weaver universal fitment)
- Reticle adjustable for windage/elevation


Color:  Matte Black
Lens Coating: Green
Magnification:  3-9x Adjustable
Objective Diameter:  42mm
Reticule Type:  Mil-Dot
Eye Relief (in.): 2"
Exit Pupil: 9.3 - 3.1mm
Tube Diameter: 44mm
Field of View: 36.7ft - 12ft
Click Value: 1/2 MOA
Length (in.): 7.5"
Weight:  26.3 oz.

Package Includes:  NcStar 3-Rail Sighting System Scope, instruction manual, cleaning cloth

NcStar 3-9x42 Full Metal Tactical 3-Rail Sighting System (3RS) Scope Categories:

GUN FORGE - Custom Built by AMS Customers

People Also Viewed

More From NcStar

Write A Review

  • Please do not use the review feature to ask questions. Any reviews containing questions will not be answered, and will be deleted
  • Please keep your review clean of obscenities and other distasteful content
  • Please be detailed in your review, and talk about what you like/dislike about this product
  • Click here to review submission guidelines.

No one has reviewed this product yet, why don't you be the first?

Free Shipping

45 Day Warranty

110% Lowest Price Guarantee

Best in Class Customer Service

Same Day Will Call Pickup

Same Day Local Shipping

The store is amazing. I have found there items that I could not find in other stores which makes it the best. I have made questions and inquires about products and the customer service has responded super fast with accurate answers. All my products have arrived in excellent conditions in spite of other stores. My last product came late because it was rescheduled but that was UPS fault I think. I would like to thank Matthew for his exceptional customer service. Whenever you need help, please try to contact him. My advice, buy in Airsoft Megastore, they have coupons and the widest variety of airsoft products. RandyLoy, USA
I ordered a gun sling a couple weeks ago. Unfortunately, one of the clips broke. After a few email correspondings with a customer service representative named Jun (my emails did not show a last name), AMS sent me a replacement sling for free. I did not even have to send my clip back. AMS is a terrific store and I plan on doing more business with them. They were polite, efficient, and just a pleasure to work with. I would recommend Airsoft Megastore to anyone. mskanwischer, USA
Airsoft Megastore is The Best Airsoft Website Out There (I Think) and i Will Always Be Loyal to AMS and Order Almost All of my Gear From Them. The Customer Service is Also Amazing, Jun my Customer Service Representative Has Helped Me With Anything i Needed Help With, Especially My Order Problem (Had 2 Magazines Missing from Order) and Jun Helped Me With The Problem, and Now The Mags Have Been Shipped To Me. Thank You So Much AMS and Jun. Ethan1214, Saskatchewan, Canada
I love that Airsoft Megastore has videos of most any information you will need to learn and care for your products. I purchased an AEG for my son and in short order, unfortunately, it began grinding after brief use. I emailed for warranty repair with symptoms and with 24 hours (22 to be exact) I received an email explaining possible causes with a video like for tuning the gun. I had the gun working again within 15 minutes, avoiding returning the gun and the mess associated with returns\repairs. Excellence on Sean's part to help out a first time customer of theirs. Highly recommend. bucfanjeff, USA
Everything worked great, shipping was super fast. I am very pleased and won't hesitate to order through airsoft megastore again. rob_riley, USA
I loved buying from airsoft megastore because the employees helped me recover my tracking number and told me where the package was at, I would love to buy from airsoft megastore again! Battlefield4Rule, USA
Be our next fan! We are focused on long lasting customer relationships. Try us out. Find out why everyone is raving about Your Name, Your Location

Real People. Real Airsoft