The Firearm Blog

I have previously discussed the Ultimax 100 Mk4. This is the latest iteration of the Ultimax 100 design and is being entered into the IAR competition by General Dynamics, although it designed by Singapore Technologies Kinetics (STK).

Photos by SMGLee. Click to expand:

Quick Change Barrel

I like the design of the ambidextrous fire selector.

Compared to the Mk4 the Mk5 takes unmodified STANAG (M16) magazine, has quad rails and a bipod/foregrip rather than a separate bipod and foregrip.

I am not sure if the Ultimax 100 Mk4 100 round drum magazine will be made compatible with the Mk5. The Mk4 took modified STANAG magazines.

Ultimax 100 Mk 4


Ultimax 100 Mk 5

UPDATE: Defense Review has more info.

SayUncle blogged a video of this ulta-high capacity 150 round AR-15 compatible (STANAG) magazine: the Armatac Industries CL-MAG.

The CL-MAG™ offers for the first time a reliable and efficient 150 rd magazine for the .223/5.56mm rifle. Designed to fit NATO standard (STANAG-4179) rifles, the CL-MAG™ quickly converts a rifleman with a standard M4 into automatic support personnel. The 150 rd magazines have been routinely emptied through the standard AR-15 setup without weapon failure. (Ambient temperature starts). The flexibility of such force multiplication makes the CL-MAG™ the most dominant accessory for the AR/M4/M16 family of weapons.

I must say I don’t get it. If the magazine breaks you are stuffed unless you are carrying other magazines. For example you may have to carry a 150 round CL-MAG, as well as 3×30 round magazines. If the CL mag jams after 50 rounds you are now carrying 100 rounds less than you were a minute ago.
On the other hand the Singaporean 5.56 LMG, the STK Ultimax 100, the same people who make the CPW, takes STANAG magazines and currently uses a modified 100 round C-Mag. This would give it 50% more capacity and increase rate of fire. The added weight may even be beneficial (when being fired, not carried).

Photo from Wikipedia.

The Ultimax 100 is being marketed to the Marines. It is has very low recoil, takes standard M16 magazines and can be operated by one person.

The weapon in action:

Earlier this year at the Singapore Airshow, Singapore Technologies Kinetics, otherwise known as ST Kinetics or STK, the Singaporean firm who make the Ultimax 100 machine gun, announced their a new PDW (Personal Defense Weapon) type sub machine gun called the CPW (Compact Personal Weapon).

I think that is a kids hand. Photo from textfiend.net.

According to the STK brochure and the pieces of info I picked up on the internet:

• Can be holstered
• Lighweight
• 7″ Barrel
• Multi-caliber. Currently available in 9mm (30 round magazines)
• Translucent pistol grip to check rounds in the magazine
• Comes standard with reflex sight. Iron sights are an optional extra.
• Retractable stock
• Low recoil
• Low cost

Specs:

Length: 350mm
Barrel Length: 180mm (7″)
Mounting system: 2 sets of picatinny rails
Weight without accessories: 1.5kg (3.3 lbs).
Firing modes: semi and auto (selector can be seen on above photo)
Method of operation: delayed blow back
Rate of fire: 900 to 1100 rpm.

Click to expand.

I would assume they will also offer a typical PDW round such as the MP7’s 4.6×30mm or the P90’s 5.7×28mm.

The gun looks very similar to the MP7 and I think would be in direct competition with it. It weights less (MP7 weights 4.19 lbs/1.9kg), is slightly shorter in length and has a similar rate of fire. I think the CPW’s main selling point is cost.

A couple more photos:

This looks like a prototype. It has a slightly
different trigger to the one above.

More info at STK