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A&K M4 GR-300 Carbine NS15 Full Metal Airsoft AEG (Model: SBR)

ID: 30624 (AEG-AK-G300-S)
4.6 stars, based on 41 reviews
A&K M4 GR-300 Carbine NS15 Full Metal Airsoft AEG (Model: SBR)
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Canada Export CompliantCanadaExport Compliant
This gun has a muzzle velocity rating (FPS) between 366 and 500, and is compliant for export to Canada.
Model Options:


  • Full Metal Receiver
  • Side folding stock
  • 20mm flat top rail receiver
  • Ventilated style gas tube
  • Adjustable front and rear sight
  • Removable rear sight
  • Front and rear QD sling points
A&K has long been a player in the Airsoft AEG market and now they are poised to tackle an even larger segment of the market with their new NS15 series of AEGS. A&Ks NS15 series of Airsoft AEGs takes their already popular line up and modifies them in the factory with some of the most popular upgrades around. Internally the A&K gearboxes now feature a quick change spring system, which allows the user to modify the FPS of the gun easily and without having to disassemble the entirety of the gearbox. A&K replaced the standard 6mm gearbox bearings used in their previous gearboxes with the larger, more durable and efficient 8mm bearings as well as reinforcing the gearbox shell itself. All of these upgrades, now made standard improve the durability and reliability of A&Ks NS15 system and allow for the use of LiPo batteries up to 11.1V.

Length: 740mm, Full length
Weight: 10 pounds
Inner Barrel: ~363mm
Magazine Capacity: 450rd Hi-Capacity. Works with Matrix, G&G, Tokyo Marui and other compatible M4 / M16 Series Airsoft AEG Magazines
Muzzle Velocity: 370~400 FPS (Measured with 0.20g BBs)
Thread Direction: 14mm Negative
Gearbox: Ver 2 Full Metal, Fully Upgradeable
Motor: Long Type
Fire Modes: Semi/Full-Auto, Safety
Battery: 9.6v Small Butterfly Type recommended (Battery not included. Wired to front with Tamiya connector)
Hopup: Yes, Adjustable
Package Includes: Gun, Magazine, Manual


FPS Range: 370-400

About A&K

A&K has been in business for more than a decade, boasting a huge selection of popular rifle models as well as unique platforms; Machine Guns, SMGs, DMRs, and even WWII replicas. A&K provides a great lineup of Airsoft products at a great value.

41 Customer Reviews

(Write a review)

by Daniel C. on 12/12/2018
"I got this gun when it was on sale for $170. All I have to say is that this gun is built very well. Me a 6' 1''man weighing 200lbs fell on it, and it can still shoot straight. Did have some issues with the wiring to the motor, but other than that its a good gun.
by Tong Y. on 03/11/2017
"Great gun for the price. Shoots right out the box. Comes with hicap mag, tools to take off stock, and two sling adapters that can be screwed in on either side of front guard and on the right side of the folding stock. For right handers it's kind weird but you'll get used to it.

Crono in 40+ weather and 7.4 lipo and it's 380-390 stock on .20. I used .25 on field and it's killer at 50+ yards. Where most rentals fail to reach, I reached out to get them. RPM is slower then you expect. I liked it as I don't use so much bbs in my midcaps. My 1200mah lipo was good for 6 games with a mix of auto and single fire.

Metal construction is great. Flawless in that it looks different from other m4's. I like the blueish grey plastic on dark grey. Took off the front and rear sights and put on a T1 red dot. Looks like a FAN Fal from afar but that's what I was looking for. A different look.

Bought poly mag midcaps and feeds flawlessly. Most people have problems because they don't put in mags correctly for this gun. Hopup tip in first and then jam it in. Hi cap that came with it is a metal hicap. Great for when you want to cover fire.

Haven't taken the gun apart so can't say on inner barrel length or the innards. Hopup cover is spring so it'll keep out dirt when you're​ running around outside and won't accidentally open. To get off the handguard for the battery compartment, you I really have to turn the handguard and the push up. Don't be afraid as you need massive power for that. Has holes on bottom handguard if you need pic rails, you can buy rails to mount it. I don't need it as the guard is thick and great to hold.

Locking Metal Charging handle and feeder does nothing. Just asthetic. +1 for less things to break. Stock locks great when out. When folded it is kinda loose but i rarely have it folded as it's a long range gun. Probabaly the only con is that the orange tip is plastic and I'm not going to gripe about that.

Coming from a paintball player this gun is right on the money for a starter gun.

+ All metal construction
+ Shoots max right out of the box 380-390
+ Good looking
+ Accurate 50+ yards

- Nothing
- You don't own one
- Go buy one
by Daniel G. on 09/27/2016
"I have always been a fan of A&K but and as usual this gun very good
But the only problem that I have with it is how to get the hop up. looks
awesome unusual handgun cool stock

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