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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
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Weapon Shield Extended 135

  • TRIPLE EXTENDED Industry Leading 135 Day parts and defects warranty
  • Covers for all repair work
  • Comprehensive Tech Support
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+ Tech Inspection

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  • Gearbox Cleaning
  • Gearbox Lubrication
  • Fuse Replacement
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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!

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King Arms Colt M933 Ultra Grade Series M4 Airsoft AEG Rifle

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$132.95Guaranteed Lowest
  • Model: M4
  • Muzzle Velocity: 415 FPS
  • Build Material: Polymer Receiver, Metal Barrel
  • Weight: 5.7 lbs
  • Overall Length: 26.5" in. / 29.75" in.
  • Inner Barrel: 268 mm
  • Battery Type: 8.4V Nunchuck
  • Gearbox: Version 2 (Metal)
  • Magazine Capacity: 300 rounds
  • Color: Black
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Must Haves

BB CombosBBsExtra MagazinesFace & Eye ProtectionGun BagPremium BatteriesSmart Charger for AEGsUniversal Tactical Sling

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  • Details
  • Ratings & Reviews

Our take:  Players looking for a reliable AEG at a low cost will find this rifle to be perfect.  Listed under King Arm’s Ultra Grade series rifles, the Colt M933 AEG sports a shorter barrel, nylon fiber receivers and a full metal gearbox.  But despite its size, this compact carbine shoots easily over 400 FPS (0.20g BBs).  It also comes with a fully adjustable hop-up to ensure your rounds reach your targets.  A retractable crane stock allows you to customize the stock position for custom comfort.  And, thanks to its Version 2 gearbox, you can easily upgrade this AEG to fit your needs.  If you prefer a modular design, most aftermarket drop-in rail systems are compatible with the M933.  In addition, players can remove the carry handle within seconds to mount their choice of sights or scopes for improved target acquisition.

- Official Colt licensing and trademarks
- Full metal Version 2 gearbox
- Nylon fiber upper & lower receiver
- Front and rear metal sling mounts
- Adjustable front and rear iron sights
- Removable carry handle
- Retractable 6-position LE stock
- Shortened CQB barrel
- Realistic mock gas tube
- Flash hider/delta ring wrench

Operation:  Electric Automatic
Build:  Metal Outer Barrel, Gearbox / Nylon Fiber Receivers / Polymer Handguard, Stock, Grip
Firing Modes:  Semi-automatic and Full-automatic, w/ Functional Safety
Muzzle Velocity:  400 – 415 FPS (w/ 0.20g BBs)
Gearbox:  Full Metal Version 2
Magazine:  300rd High Capacity (gear wind-up)
Battery:  8.4V Nunchuck
Inner Barrel Length: 368 mm
Inner Barrel Diameter:  6.08 mm
Hop-Up:  Adjustable
Weight:  5.7 pounds
Overall Length:  26.5" in. / 29.75" in. (Retracted / Extended)

Ammo type:  Seamless 0.20g or heavier (0.23g, 0.25g, 0.26g, 0.28g, etc) BBs.  For maximum performance and accuracy, Airsoft Megastore recommends GoldenBall ProSlick BBs which carry perfect spherical consistency and density, available at Airsoft Megastore for the lowest price on the market, guaranteed.

Package includes:  Rifle, hicap magazine, nunchuck battery, standard wall charger, delta ring/flash hider wrench, cleaning rod, instruction manual

Color:  BLACK

Battery Charger Recommendation:  Although this fully automatic airsoft rifle comes with a standard wall charger to charge the battery, Airsoft Megastore recommends the use of a smart charger to avoid overcharging the battery(overcharged batteries may cause decreased airsoft gun performance and may shorten battery life significantly).  Smart chargers not only shorten charge time significantly (up to 800% faster charging), but more importantly, also automatically shut off once the battery is fully charged to avoid overcharged batteries.

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Product Reviews

5 King Arms Colt M933 Ultra Grade Series M4 Airsoft AEG Rifle *****
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4 King Arms Colt M933 Ultra Grade Series M4 Airsoft AEG Rifle *****
Great Gun for Great Price

"This gun is totally worth the buy. It absolutely shoots 415 fps out of the box. I have'nt field tested this gun yet but the grouping on targets is ridiculous from up to 150 ft. Once you find the right adjustment for your hop up this gun is perfect. Its a little light weight and perfect size for run n gun. This gun can also shoot extremely fast. I have upgraded mine and have put an acog, supressor, one point sling, and have dropped in an rm4 handle. This gun is a steal for the price!!!"

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3 King Arms Colt M933 Ultra Grade Series M4 Airsoft AEG Rifle *****
Its a good beginner gun

"Ive had this gun for about 6 months and it still performs well. after the first month the pin right behind the selector switch fell out. after that the semi auto option stopped working, so you could hold the trigger on the semi auto and it would shoot full auto. the battery compartment is fairly difficult to get to. the battery it comes with is not good at all. i used a smart charger every time and after the 2nd month of having the gun the battery failed to hold charge. the gun is great for CQB but with a full face mask i couldnt aim down the iron sights. it chronoed in at about 415 fps so depending on the field limits it may pass for CQB fields."

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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
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