Truvelo CMS 20x42mm Anti-materiel Rifle

South African company Truvelo has released a new anti-materiel bolt action rifle chambered in 20x42mm caliber. The rifle itself is not new, because it is based on their large caliber CMS rifles, but the new caliber makes it a pretty interesting military firearm.

Truvelo CMS -

Truvelo CMS in this configuration is a very compact bolt action rifle with overall length of 38.6″ (980 mm). It features a folding stock and with the stock folded, the rifle becomes as short as 27.5″ (700 mm). The barrel is fluted, free floated and hosts a massive muzzle brake. Barrel length is 15″ (380 mm). There are Picatinny rails on top of the receiver and on front portion of the forearm. The bolt of the gun has four locking lugs. The rifle is fed from a five round detachable box magazine. The rifle weighs 25.35 lbs (11.5 kg) with the magazine attached.

This Truvelo rifle is designed for engaging light vehicles, missiles, sniper positions and other typical anti-materiel rifle targets.The effective range of fire is stated to be 1000 meters. The accuracy of this rifle depends on the type of used ammunition. According to the technical specifications from the manufacturer’s website, the rifle is capable of 2 MOA accuracy at 500 meters.

Truvelo CMS - 1 (2)

Truvelo CMS - 1 (4)

Truvelo CMS - 1 (3)

20×42 mm ammunition

The 20×42 mm cartridge is lighter and shoots with a much flatter trajectory than the 40mm NATO grenades. It was initially developed by another South African company called Denel PMP. It is a straight walled, belted, low recoil cartridge with a variety of projectiles: API, HE, SAPHET, PRAC and PRAC-T. The projectiles are launched at subsonic muzzle velocities of 1000 fps (310 m/s).

20x42mm ammo

20×42 mm cartridge

Relatively compact size of this rifle should make it especially desirable for special forces, paratrooper and reconnaissance units.

Hrachya H

Being a lifelong firearms enthusiast, Hrachya always enjoys studying design, technology and history of guns and ammunition. His knowledge of Russian allows him to translate and make Russian/Soviet/Combloc small arms related information available for the English speaking audience.
Should you need to contact him, feel free to shoot him a message at


  • DW

    The super slug gun!

    • Giolli Joker

      A 4 ounces buckshot load would be cool as well.

  • ??
    • Tom – UK

      need’s hip firing

    • Giolli Joker

      It’s cute.

    • Porty1119

      I want one.

  • PK

    Three 20mm guns, now? Truvelo is doing some interesting things, over the years.

  • Squirreltakular

    So, once the NFA is repealed, who’s down to do a group buy with me? 😀

    • JustAHologram

      So many cool South African toys to get

    • PK

      Have to get rid of the GCA, too. That’s the one that stops imports of things like this, not the NFA itself. If it weren’t for the 1968 GCA import regs, we could import this rifle as a DD right now.

      • John Bear Ross

        Maybe they could open a US subsidiary, like HK, FNH, and Glock. Or license the design to a US maker. It would sell, even if we could only fire blue training rounds and beehive rounds.


      • Squirreltakular

        True, but I’d rather not pay a tax stamp on each round.

        • PK

          You may be misunderstanding what sort of ammunition needs a tax stamp, each. A payload under 7 grams total isn’t a DD, although it is usually an explosive and requires safe storage and so forth. Just the bore diameter makes the gun itself a DD unless specifically exempted, but the ammunition isn’t automatically DD per round.

          • Squirreltakular

            Well a round of 20x42mm weights about 110 grams, so unless I’m missing something…

          • PK

            What you’re missing is that the explosive, and only the explosive, is the payload for DD purposes. Not the whole cartridge, not the metallic portion of the bullet, but only the energetic compounds. Easy mistake, the NFA/GCA sure creates a maze!

          • Squirreltakular

            Still not missing anything. Look at a picture of a 20x42mm round. I have an extremely hard time believing that a projectile that size carries less than 7 grams of explosive. Even if it was only a tenth the weight of the cartridge, that’s still 11 grams. If you have different info, please enlighten me.

          • Squirreltakular

            I could be totally misguided in this calculation, but a 40mm M203 cartridge weighs 230 grams and contains 32 grams of Comp B. That’s about 14% of the total weight of the cartridge. Assuming (possibly in error) that the same proportions apply to the 20mm, then it should have over 15 grams of explosive in it.

  • Evan

    All I have to say is that this rifle looks more like a choad than any other gun I’ve seen.

    • so you have never seen the deagle dildo then

      • Evan

        Please tell me that isn’t a real thing.


          • Bursar

            Everything is a dildo if you are brave enough.

        • Anomanom

          Do not look. You cannot unsee that.

  • Countdown to a cell phone video of a shirtless Russian guy firing one single-handed with the stock folded appearing on Youtube in 3… 2… 1…

    How in the world does this benefit from a 15″ barrel? Did Lockheed forget to convert between English and Metric again?

    • Squirreltakular

      Well, it is a grenade. Probably not a lot of barrel needed to get the necessary range.

      • iksnilol

        Exactly that.

        I think the M203 needs the barrel only to generate spin, not to generate much if any velocity.

        • PK

          That’s why it’s such a thin barrel, and aluminum as well.

        • DW

          This is why m79s are chopped down to be modern blunderbaus for SOF guys

  • Cybrludite

    Sub-sonic ammo, huh? How about replacing the muzzle break with a can?

    • iksnilol

      Would be amazing.

    • Uniform223

      That can would be massive

      • iksnilol

        Wouldn’t have to be that massive. Could realistically make it extend 10-15 cm in front, and about 20 cm in the back.

        Would need to adjust the forearm then to provide space but would be totally doable.

    • John Bear Ross

      I would like to see a brass solid or hollowpoint projectile developed for this cartridge. Give it a sporting use exemption in the States (Hell, make it a DD, I’ll still buy it), a 16″ carbine or 20″ rifle barrel, and bring back raptors and sabertooth tigers to hunt.


    • Leveller

      About a 1,000ft/sec and Short Ranged to about 350 Plus meters…

  • micmac80

    Subsonic ammo will make for a huge drop at distance so precise ranging would be needed to hit anything

    • kyphe

      High mass rounds suffer less because they retain energy better. But looking at that barrel length I think this was not intended for extended ranges like the WW2 AT/AM rifles but to be a more like an accurate 20mm grenade launcher with added kinetic energy properties.

  • H

    make it semi auto, and give to Mr Miculek to handle

    • Barry Omaha

      Look up the Denel “Neopup” PAW-20.
      It’s semi-auto and fires this same ammo.

  • FulMetlJakit

    I’ve heard of SAPHEI, but not SAPHET. Suppose you can add a tracer to most anything, but the on round labeling on the second from left in the 6th picture makes me wonder.
    I like Giolli’s idea, load this up with 000 tungsten shot.

    • Giolli Joker

      It is SAPHEI just the “I” is not so clear and there’s a typo in the article.

  • Ben Loong

    A sniper grenade launcher?


  • thedonn007

    Does it bug anyone else that the muzzle brake is crooked?

    • iksnilol

      Not that unsual for guns that don’t recoil straight up.

    • Gus Butts

      Pretty common on bolt-actions, surprisingly,

    • micmac80

      On rfiles we often time the muzzle brake at an engle to offset some bipod hop generated by of the torque from barrel spinning the bullet. But in most guns that is orientated at something like 11′ o clock , here it seems other way around but that could be form mirroring the picture sometime along the way.

      Muzzle brakes are timed off also in semiautos especialy in competition arena.

    • Charles Newman

      Yeah it does!!

    • Oingo Boingo

      Zulu machinist.

    • Banjo

      My 3-gun rifle has a 3-port comp that is timed about 5 degrees off center. Being that it is often held standing or kneeling, the reasons for my rifle to be timed off-center is probably different than this one. To answer your question…no, it does not bug me.

  • Major Tom


    • DW

      Doubt anyone can dodge 79m/s round from the 40mm LV launchers. JM could probably shoot it down with his EDC tho

  • GD Ajax

    Technically. It’s more of a bolt action grenade launcher than a rifle at that point. Great for stationary targets, worthless if the bad guys have their own grenade launchers.

  • LazyReader

    My Widdle Cannon

  • Gus Butts

    Oh my god I need one.

  • Harry’s Holsters

    That short barrel is the most BAD A*S thing I’ve seen this month!

    Ultimate truck gun?

  • Vuyo Ncube

    Whoop, whoop! South Africa represent!

  • Xtorin O’hern

    soooo, does there exist a 20×42 APDS round? if so now THAT would be badass in this rifle/nadelauncher thing

    • demophilus

      Dunno about 20mm APDS, but the 20x42mm case might be a good host for a ring airfoil (tubular bullet). IIRC, there was a 105mm tank gun ring airfoil practice load that was a ballistic match for APFDS out to about a klick; it destabilized and dropped off after that.

  • To Tin Fung

    I first learnt about this gun through the movie Chappie lol

  • Edeco

    Bolt action seems like overkill for the pressure/range. Would think they could get lighter weight or higher ROF some other way.

  • Uniform223

    Finally, a rifle powerful enough to take down those pesky honey badgers.

  • IshTheBuddha

    Automatic version = Space Marine bolter.

    • John Bear Ross

      That’s basically what the PAW-20 Neopup is, if you think about it. Fires the same round semi-auto. Just needs a bigger mag.


  • Richard

    I really want one. I have absolutely no idea what I can do with it but I want one anyways.

  • Frank Grimes

    needs moar barrel

    • iksnilol

      Not really, IMO it has plenty barrel as is. Would’a been better with an integrally suppressed 25 cm barrel to bring the overall barrel length to 40 cm.

      • Frank Grimes

        Yeah I understand the concept as to why it is the way it is, I just think it would be cool to make it the equivalent of a modern day Solothurn or something with high BC bullets going fast that you can use to engage a point target at extreme range and engulf it in burning zirconium.

        • iksnilol

          No offense, but that’s already done. 20×102 truvelo exists IIRC. You ain’t getting rifle velocity outta 20×42.

  • Kivaari

    Now that is what was needed in Afghanistan for the 500-1000m gap.

  • Kivaari

    How about an M79 version. Small, less punch but greater range. Build one on a H&R 10 ga.

    • DW

      Buy a BPS 10ga, chop to desired length, load slugs and pretend to have a small Chinalake

      • Kivaari

        I was thinking if this is a low pressure round (aluminum barrel) that the simple solution is as simple as taking a 10 ga. (19.7mm) and convert it to 20mm. Can you imagine a military weapon that costs under $300 w/o the elaborate sight. An ugly recreation of the odd M79 butt stock and a fancy red dot grenade optic and it would work to dislodge those PKM crews in Afghanistan. There’s no reason to go to something as complex as the XM25. Just take a rifles 10 ga. and make some HE rounds for it. A single shot HE the size of this, or less, would be a great addition to the platoon.

      • Kivaari

        This would be for others. I broke my neck twice and the biggest thing I shoot anymore is the 5.56mm.

      • MichaelZWilliamson

        Look up the 12 Gauge From Hell (Rifle). He’s achieving 13-18,000 ft lbs in rifled 12 gauge.

  • Kivaari

    WE, our warriors, need to be live testing this where ever our forces are engaged. This in a RAP guided version like the PIKE will solve several problems of crews are facing in Afghanistan.

  • Vern

    Editors, what is with all the horrible spammy links to totally unrelated shopping crap? This is not how the internet works. You should fix it or the internet gods will be displeased.

  • RA

    That short barrel and brake set up seems like it could part and dry your hair when you’re shooting it ;-D

  • MichaelZWilliamson

    Is the muzzle brake supposed to be canted? Perhaps to offset barrel torque?

  • dailyrealist

    Simplify the component issue by taking a 50Spotter case, or a shortened 50BMG case, utilize bullets intended for 700 Nitro (.700) or 600 Nitro Express (.620) or 577 Nitro (.585). Make the case about 2 inches long with a 30 degree shoulder and call it a 700BR. heh heh heh.

  • tarnishedcopper

    It would be kind of like 6 sticks of dynamite on the end of a 500 meter stick!

  • Capn Stefano

    Nice, another weapon system that mere US citizens can’t own, in spite of supposedly having the RIGHT to keep and bear ARMS