Stock Specifications
FPS 0.78 Joules
Length: 530mm or 21"
Weight: 850g or 30 oz.

Ammo capacity:

46 rounds

KTW Ithaca M37 - Review
by Shadow

Don Sang KTW ITHACA M37 SHOTGUN review By SHADOW Here is a review by SHADOW. He plays the of role recon/sniper for his team. But when he's not taking out the enemy from afar. Or performing reconnaissance for his team, he is back up for the Entry Team when they play CQB scenarios and his weapon of choice is the M4 "MasterKey". For those of you who don't know what an M4 "MasterKey" is, basically it is a Colt M4A1 Carbine with a 12-gauge shotgun mounted to the underside of the front handguard.

On the real steel M4 "MasterKey"; the shotgun most commonly used is the Remington M870 shotgun. In the case of airsoft, the shotgun is a replica of the Ithaca M37 shotgun. The real steel version of the weapon was developed as a dual-purpose assault weapon. The shotgun can be used to open locked doors, hence the nickname "MasterKey". It can also be used as a close support weapon for when you need the firepower. Having a secondary weapon ready and in hand is a big advantage for anyone backing up the entry team.

Here are some specs on the replica:

Manufacturer: Don Sang Model Company (licensed under KTW)
Product Name: KTW Ithaca M37 Shotgun
Detail: Will Fit All Marui M16 Series AEGs
Built Material: ABS, some metal

System: Pump Action
Magazine Capacity: 46
Length: 530mm or 21"
Weight: 850g or 30 oz.

You can pick up one of these shotguns at just about any on-line airsoft retailer. SHADOW purchased his from www.dentrinityshop.com for $95.00 before shipping. Now here is SHADOW's review, so enjoy.

KTW Ithaca M37 "MasterKey" Shotgun Playing CQB scenarios, I wanted to be able to have a weapon that was both functional and badass looking, a weapon with intimidating looks. So, when I saw the pictures of the M4 "MasterKey". It was love at first sight and I knew it was my weapon of choice for CQB scenarios. Here are my impressions of the KTW Ithaca M37 "MasterKey" Shotgun.

When I first opened the box, it did not look as nice as the pictures that I had seen on various websites (no surprise to me). None the less, it didn't look bad either. I picked it up out of the box and it was very light in weight, it weighs 850g, which is about 30 oz. That was one of my concerns about the shotgun to begin with. I was worried that it would put stress on the front of the M4. But, my worries were quickly dispatched due to how light it was and the way it mounts to the M4. It doesn't really put any strain on the front of the weapon at all. It feels filmy and not very solid. Be sure to check all the bolts and screws to make sure they are tight. All mine were loose. Just don't over tighten them as the threads could strip easily.


Rear Mount with Mounting Bolt in place

Fitting This model does not require you to have a R.I.S. handguard on your M4. The KTW Ithaca M37 Shotgun mounts to all of Marui M16 Series AEGs. You could probably mount it on others, but it would need to be modified, and you would probably need to be handy with fabricating parts.

The rear mount slips over the magazine receiver on both the M4 and M16. The pivot pin for the main body is replaced with a bolt and locking nut.

I recommend that you use a light grease to help slide the bolt into place. Put the locking nut on, but don't tighten it just yet. I did notice a casting flaw with this mount, but it was no big deal.


Front Mount and 1 or 2 BB Fire Control Switch

Once, you have the rear mount attached, the barrel mount can be put on, it attaches to the underside of the front sight or bayonet lug. You may have to do some grinding on the bayonet lug to get the mount to slide all the way on, but mine didn't require any.

Now that you have the barrel mount in place all you have to do is just tighten all of the hex head set screws and the locking nut for the rear mount.

All the tools that you will need to mount it with come with the shotgun. So, you won't have to try and find the right size hex head wrench. Just don't over tighten them; all you need to do is snug them up.


Scene from the movie "Predator"
Special thanks to http://www.arniesairsoft.co.uk for use of picture

The only bad thing about mounting the shotgun on the M4 is that you will have to remove it to replace the battery.

You could relocate the battery, externally perhaps. Or you could modify the handguard so that the battery is on the top underside of the handguard. This is not a problem if you plan on mounting it to the M16.

Looks As for the looks of the shotgun, like I said before, it's not really that bad. It kind of has the looks like across between a toy and real steel. It is made of mostly ABS with a little metal. And by little, I mean very little metal. I would give it a 4 to a 4.5 on a scale from 1 to 10 for looks. From a distance, it gives both the M4 and M16 that "Badass Look". In Airsoft, looks are about 90% of the sport. I did paint the front pump handle with flat black paint to make it match the rest of the weapon. The shotgun also comes with a rear pistol grip in case you wanted to use it solo. All you have to do is remove the rear mount and put on the pistol grip. The shotgun then resembles a sawed-off shotgun.


Special thanks to Kenny aka 888 for use of picture

Overall length of the shotgun is 530mm, which is about 21 inches, so it would be good for CQB scenarios or tight woodland scenarios. In the near future, I plan on putting a laser sighting system and a SOCOM silencer on the M4 to help balance it out, along with a shell carrier on the side of the shotgun with deactivated shotgun shells in it for looks.


Overall length of M4 with extended stock and "MasterKey" mounted
is just less than 38 inches and weights 8.8 lbs.

Magazine loading into lower tube

This shotgun is spring-powered and it uses a magazine that loads into the front lower tube of the shotgun. The shotgun came with two magazines and it says that they will hold 46 BBs, but I have loaded 48 BBs in them with no problem. I wouldn't put any more than that, though. The magazines are about 8 inches in length and will fit in a utility pouch or M16 mag pouch. To fire the shotgun, you load one of the magazines into the lower tube underneath the barrel. There is a small switch where the barrel goes into the receiver.

You can flip it forward or backward. This is for firing one or two BBs at a time. When in the two-fire mode, mine did fire three BBs sometimes. I don't know if this will cause any problems on down the line or not. There is also a switch located at the trigger guard. You push it in to activate the feed for the BBs. Then all you do is pump the handle like a real steel shotgun. Take the safety off. It is located at the back of the trigger guard. Now, squeeze the trigger and each time you want to fire a BB, you just pump the shotgun.


The shotgun comes with two magazines(left). Safety and Feed Activator Button(right)

The power of the shotgun is nothing to brag about, but it's not bad either (I've seen worse). Supposedly it shoots about 200 fps but this is unconfirmed at the moment. If I had to guess, I would say it shoots somewhere between 180 and 200 fps. It does have decent range, and I have hit targets out to 50 ft. Using .25g BBs, but for CQB scenarios I will be using .2g BBs. It is primarily a close up weapon and you couldn't engage targets at any great distance. But, because it is low in the power range, you could engage your opponents at close range without the worry of seriously hurting them. The shotgun is really for CQB and it is a plus having your back-up weapon ready and on hand. This is why I chose the M4 "MasterKey" for CQB. If I decided not to carry my pistol, I would still have a back-up weapon and a little extra firepower when needed. Not to mention the fact that in airsoft, having the "one badass looking weapon" is half the fun.

Conclusion Here is my overall view of the KTW Ithaca M37 Shotgun on a scale of 1 to 10 with 10 being the best possible rating:

Appearance

4-4.5/10

Build Quality

4-4.5/10

Performance

3.5/10

Value for Money

5/10

Overall Potential

4/10

Well, that is my impression of the KTW Ithaca M37 Shotgun and I hope you enjoyed my little review on it. This was my first review of any weapon; I have plans on reviewing other airsoft weapons. If you have any questions or would like to contact me, please feel free to e-mail me at confirmedkills@hotmail.com. Remember, always wear proper eye protection, be safe, and have fun.

Click here to view a larger image of Billy's Keymaster
Technically this is a Remington m870 pumpaction, but this image is here to show you the one referenced in the film 'Predator'


TM M4A1 Carbine with KTW Ithaca M37 "MasterKey" Shotgun

NOTE: The shotgun shell pictured above are REAL ammunition, the KTW model shotgun does NOT use shells to fire BBs.

DISCLAIMER: The above review is the sole opinion of the author of the review and does not reflect the opinions of this Website or it's administrators, associates, partners or sponsors.

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Last modified: Wednesday, May 9, 2001 9:37 AM
Except where noted copyright 2001 ArniesAirsoft
. Images from the film 'Predator' are © 20th Century Fox