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

"Another thing I ask is can you put a box mag on this?

"This gun looks pretty awesome. I'm either getting this, or the JG Sig Sauer 552 Commando. If anyone knows about both of the guns really well, can they tell me which would be better? Thanks!

"If you want an AR that doesn't look like everyone else's lame AR, this is the one you buy. The side folder stock is cool, no buffer tube so it definitely looks different! Full metal receiver, outer barrel, stock and sights. This thing is stout.
But that's kinda where the positives end. It's a cool looking M4 with some quality control issues. I ended up HPA-ing mine since the internals needed overhauled to make it usable anyway.

The most significant issue I ran into was the inner barrel on mine was machined incorrectly! The two notches that allow it to be clipped into the hopup unit were cut slightly too far forward, causing the barrel and bucking to be pushed backwards too far to allow proper feeding. Comparing it to two other barrels I had I found that it was made wrong and once swapped it fed reliably enough. Speaking of barrels, the choice between carbine and SBR only effects the length of the outer barrel, the inner of both models is the SBR one so just know that.

Secondly, the gearbox of mine sounded awful. Im not one of those people that shims their gearboxes to perfection, I usually couldn't care less but this one sounded horrible out of the box.
Aside from those two issues the only other complaints I had were minor, being the very tight to remove front handguard for the battery compartment, and the iron sights are cool looking but not nice to use, and your pic rail space is pretty limited.

"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.

"I received the A&K LR/GR-300 for Christmas, for I asked for it. It is a fantastic AEG. The motor is quite loud, like most other A&Ks, but with some tuning, my rifle is shooting at a great RPM. (I don't want to give an inaccurate guess.) For a little under $200, you'll be getting yourself a fantastic AEG. My pros and cons include:

PROS-
⋅fully metal
⋅accurate
⋅folding stock (good for storage)
⋅totally customizable and upgradeable

CONS-
⋅low rail space
⋅front wired (personal opinion)
⋅needed some tuning

"Only giving it 4/5 for now until it's field tested tomorrow on G&G day at Ballahack. First thinks fist, the inner barrel is not 400mm, it is more like 330mm inner barrel stock. Mine came with a 9.6v small brick type battery, and I purchased an Intellect 9.6v nunchuck style battery, both of which fit very well, however the nunchuck style fits better due to the fact it is more flexible. Another thing to point out, as I plugged both batteries into my smart charger, said both had a full charge but t they barely cycle the motor. At first I thought I got a bad gun, but just to check I homed up one of my AK (known good) batteries, and Pew-pew she went. Anyways plugged both new batts into a wall charger for a couple hrs each and both work well. So I did a couple mods to this guy out the box: a 407mm TB barrel, a Modify hop-up unit; H-hop bucking nub, and a Madbull 60 degree red bucking. Pro needs the break-in a bit, but it has pretty decent range and laser like accuracy with my lancer Tac red dot out to 60ft. G&P high RPD mags feed flawlessly until you get to the last 3-4 bb's (wish I could buy the G&G magfollowers after market). The high cap that comes with it doesn't fit great but it does fit and lock into place. The folding stock is awesome quality, locks solid AF to the rear, however it flops around when folded to the side, no matter as I will still be marking fools with it. The sights are cool,although this could be a bad apple my rear sight is perma-canted.....tried making a spacer but to no avail, she Lea s to the left, but as firemen ruined I have that red dot😉. Oh yeah 407mm barrel fits like a glove, right to the end of the flash hider, and this thing has a metal hop-up unit in it stock, although looking at it the bucking barely gets any adjustment off if whatever is in there. Anyways I'm happy with my purchase, hope this review was helpful to y'all, it as a bday present to my self and picked it up from the epic deals, which was $160 like a minute ago.

"Just got one of these last weekend and took it out shooting. The weight and balance of the gun are better than you'd expect. While the metal construction of the receivers, stock and barrel are solid stamped metal, they're still lightweight enough to feel comfortable carrying, but solid and well balanced enough to feel easy to handle.

The motor felt a bit sluggish, even with a good and freshly charged 9.6v, but that was remedied when I lubricated the gun, and it got it back to a very respectable rate of fire and reduced trigger lag by a noticeable amount.

The hand-guard is probably the only part of the gun that feels chincy, but that's just how it feels, after using it I realized the flexible polythene was there to make swapping out batteries less of a hassle.

The front sight came off easily when the bottom post is unscrewed, allowing me to put on an optic with great visibility. The only real problem is that some of my MetalTac Hi-Cap magazines weren't as solid in the receiver as they are on my old D-Boys and G&G M4s.


PROS:
Easy to operate
Good design decisions in terms of usability and ergonomics
Solid performer
Great accuracy out of the box for an M4 variant


CONS:
A lot of rattle to the build, requires a bit of know-how to remedy
hand guard feels flimsy
Magazines can rattle a little in the lower

"I've had this particular rifle for a few years now and it still works fine. The only real proplem I have had with it is that I can't find any rails that actually fit it.

"I've had this gun for a little while, but I'm no stranger to A&K guns. Firstly the externals on this gun are great. Very solid, with zero wobble. The stock is great as well, the only issue I've seen is the ring that goes around the buffer tube can get loose causing the stock to wobble. If you use the provided tool to tighten it, the stock stays put. The front handguard is a different story. When I bought it it was super wobbly, and made the plastic feel super thin and cheap, but I put some duct tape around the base that it sits over, and voila, it's solid and feels really sturdy and strong. To remove it, stick your finger or a small object into one of the holes in the top portion of the handguard and pull down and rotate to remove it, and it'll come off perfectly every time.

The internals aren't bad individually, but the stock performance wasn't great. Though with a little TLC I have the gun shooting very well. First was the spring, it was shooting 420fps out of the box. Next was the hopup, the dial didn't rotate very well and the nub was either too soft, or didn't contact the bucking at all. Thirdly was a shim job, but that's preference I guess, because I like to run 11.1 lipo's. Otherwise the gun is completely stock, and it gets out to 150-180 feet consistently with just a change of hop-up chamber and nub.

Overall I'm very happy with my purchase. For the price, some issues were expected, and were luckily very quickly rectified. If you want a gun that'll perform very good out of the box, I'd suggest another model, or brand. As A&K seems to be on the lower spectrum in terms of performance, but for the price, and what you can upgrade immediately without breaking the bank, these guns are very attractive.

Pros:
Solid Externals
Crisp Trigger Response/ROF Stock
Unique
Folding Stock
Space for Nun-Chuck/Butterfly Batteries

Cons:
Shoots too hot (420fps)
Stock Hop-Up

"I have had this gun for a few years now and i love it. It has held up really well and i recommend it. However, i bought this on a different site for around 140. I would look around because 180 is not the best deal for this gun on the market. I rate it 4 stars only because of the price.

"I got this gun about a two weeks ago and it is a fairly good gun, great for starting out. You need to know a lot about your guns and this gun its kinda hard to find info on. It does not come with a manual! The first day I got it I had to adjust the motor and then a week after i had to change the fuse and that was fairly hard to figure out what fuse to get cause I didnt have a manual, but this gun shoots very well. The acuacry was o.k. it does have a bit of a scater on semi, but on auto it shots a straight line of bbs. I would suggest getting a smart charger, extra battery, lots of ammo (has 450 clip but goes by fast), a rail system would be nice for a fore arm grip, nice scope would be good ( iron sights are still nice), and lube (it has somewhat of a sticky barrel). before you buy this gun with accesories call evike and make sure it is compatible or call them to get some spects on this gun.

PROS:
-shoots nice
-is powerful
-full metal
-big clip
-folding stock

CONS:
-no manual
-accurace kinda bad
-needs quick work on
-full metal (makes hevey)
-weird front grip/battery case

"This is a pretty solid gun, for the price. Out of the box mine shot around 340 with .25 bb's. Comes with two sling mounts, a 9.6v small type battery, charger and a 400 round hi-cap mag. The gearbox however is not reinforced and only upgradeable to a small extent. When I took the gun apart the inner barrel was stuck in the outer barrel, to solve that you have to loosen the front sights and then loosen the outer barrel extension and then tighten the front sights again, problem solved. Then I shot it some and the hop up that came in the gun was junk and didn't work or came broken, but put a G&P hop up in it and it works fine(remember to put the spring that is on the stock barrel or it wouldn't work right). Even though the guy that bought the long barrel type of this gun (see A&K g300 long type reviews) said that his MAG mid-caps wouldn't work in his gun, I found out that my MAG mid-caps do work in this gun.

"Excellent quality gun, shot 450 fps when I first used it, after 3k rounds it fired about 415. The body is alright, the black paint comes off easily (expect it to get scratched), and I had no trouble smashing chunks out of it with a screwdriver and a hammer (was fitting a pro-win box in it). I don't believe the body will break in regular play. The stock got a bit loose but was fine after I tightened the screw.

You should be aware the inner barrel is shorter than the outer barrel, and though I didn't try it, I believe it will lead to poor accuracy (it looks pretty shitty). The barrel length is 420mm and you should replace the barrel as you buy the gun. The hop-up unit is fine.

Inside the gearbox there was perfect seal. The bushings were rather loose in the shell and the gears mostly unshimmed, but it is unlikely to cause any problems, it sounds smooth as well.

ROF with the included 9.6v 1100 NiMH is lower than, say, a stock TM but about what you'd expect for over 400 fps.

The gun comes with an AR stock-tube retention ring tightening tool, useful item for a lot of guns - not sure what to use it for here, given the LR300 stock is attached entirely by a screw :p

The included magazine is fine and feeds well.

I ran the stock gearbox for 3000 rounds on lipo with a systema magnum, and did not notice any damage when I inspected it afterwards.

The gun is also really light, which is for me a bonus, but some airsofters like to punish themselves ;)

"i didn't buy this from evike i got it shipped from china about a month ago. its a very nicely made gun. although the first thing i did was re-shim it (because the gears where wobbling) and lower the spring to a guarder sp100. The barrel it comes with is a standard length m4 barrel (357 mm) and its doesn't go to the tip of the barrel. what you should do is buy a 420mm barrel to cover the length difference. 420 is the correct length. The barrel also is very hard to get in and out. you have to undo the whole front end of the gun. it comes with metal bushing and a metal spring guide with a bearing (shoddy bearing). also don't get an aftermarket air nozzle alone. it wont fit due to the

WARNING it DID NOT work with mag midcaps!!

Pro:
good price if you looking for externals only (i was)
Study
Good Externals
Overall good internals
Shoots hot 400+fps

Cons:
No trades
sounds loud
terrible shimming
Bad cylinder compression
weak feeling tappet plate
shoddy spring guide
Short barrel
didn't work with some magazine brands
Shoots hot 400+ fps

"Mine chronoed 400 w/ .25s, around 440 w/.2s. Battery is not sufficient for a good rate of fire, but will fit any mini battery or nun-chuck, I am running it with an 11.1v 1100 mah lipo, which fits fine.

The inner barrel is much shorter than the outer barrel, there is at least 10cm of extra room to extend it. The cylinder is a full cylinder, so you won't have to worry about air volume issues. The longest barrel that will fit in the body is 420mm.

The handguard will wobble very slightly unless you screw one of the provided sling mount attatch points into it, which must be unscrewed every time you change the battery. Aside from this changing the battery is v. v. easy, much easier than a standard m4a1 - the foregrip slides forward, put batt in place, slide it back down. Looks small on the website, but there is tons of space inside.

Body feels fine, gun is fairly light which is a plus. The finish on the body looks good, but feels slightly more dry and less smooth than on some other metal bodies, for example G&P. The paint on it scratches easily.

The handgrip feels good.

The iron-sight being placed forward makes it a lot faster to use, I might actually use it on this gun, rather than replacing it. Sights don't wobble, etc.

Stock does not wobble at all, locks in place well and feels v. sturdy.

The included flashhider is pretty sexy.