Indonesian PINDAD 7.62x45mm Cartridge

While doing a research for another article and looking for different information, I visited Indonesian Pindad’s website. Their small arms page shows the different models of their SS-1 and SS-2 rifles chambered in 5.56x45mm. But then I noticed a couple of rifles designated as 7.62mm ones. Just by looking at the magazine size in relation to the weapon they didn’t seem to be 7.62x51mm rifles. I thought maybe Pindad has chambered these guns in .300 Blackout? Anyway, going to one of that rifles’ pages I saw the full caliber designation – 7.62x45mm! What in the world is that? Has Pindad decided to give a second chance to the long extinct 7.62x45mm Czech cartridge? No. It turns out this cartridge is designed by Pindad somewhere in the early 2000s. Nevertheless, I think many of our readers are not aware of it, too.

It is most likely a necked up 5.56x45mm NATO brass to 7.62mm caliber. Pindad makes these cartridges in 3 versions. The first one (MU-11TJ) is shown in the top image of this article. It has a 108 grain round nose FMJ bullet. The muzzle velocity is about 1,850 fps (565 m/s). Ballistically, it is roughly similar to the .30 Carbine cartridge.

The second version (MU-11K) is probably a less-lethal load with an 8 grain bullet made of Polyoxymethylene (POM) which is some sort of polymer material. The muzzle velocity of this load is 1,035 fps (315 m/s).

Lastly, there are two types of blank cartridges (MU-11H, MU11-TG) with black and red color codes.

And here are the rifles chambered in 7.62x45mm caliber:

SB1-V1 with a 14.3″ (363 mm) barrel

SB1-V2 with a 9.7″ (247 mm) barrel

Presumably, this cartridge is headspaced on the case mouth. It should also require special magazines (other than STANAG) but will fit in the same magazine well.

The information on this cartridge is very scarce. All I can do is to guess the answers to the questions that arise concerning this cartridge. If they needed a 7.62mm cartridge conversion for 5.56×45 rifles, why didn’t they go with .300 BLK or 7.62×40 WT or designed a similar cartridge? Such a cartridge would be more versatile in terms of bullet choices and velocities and wouldn’t be merely a ballistic copy of .30 Carbine. Maybe these cases are easier to mass produce with minimal changes to the 5.56x45mm production line?

I am sure you have a ton of similar questions too. If you know more about this cartridge, let us know in the comments section.



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 Hrachya@staff.thefirearmblog.com


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  • Joe

    I’m curious about the motives behind what seems like a reduced-power cartridge vs. 5.56.
    Maybe less recoil/muzzle flash, easier to suppress, extended range of 5.56 not needed for police work…?

    • Frank

      5.56 out of a 10″ barrel in an enclosed area ain’t fun.

  • Kaban

    It appears to be LE-only cartridge, designed to be slightly beefed-up M1C (Indonesia used this for some time, I believe). One can only speculate why did they limit its performance that way. Penetration concerns, maybe; or maybe some crazy internal law, splitting police and military arsenals, etc.

  • pbla4024

    How is it possible that the performance is almost exactly equal to .30 Carbine despite being 12 mm longer?

    • Argy007

      Perhaps due to 10 inch barrel length instead of 18 inch barrel of M1 carbine? Plus it is made for close quarter and low penetration, so more oomph is not needed.

    • iksnilol

      don’t you see how much of the bullet is in the case?

  • Bhimatama Indrana

    this bullet primarily use by Indonesian Police as standard issue bullet along with 5.56 if I remember correctly

  • Tony Williams

    I suspect that the extra case length over the M1 Carbine round may be to provide more support to the (presumably long) rubber bullet.

  • Jake Jerome

    How do I get one of those fnc clones?

    • Timmah_timmah

      Yeah I like it

  • Brett baker

    Admit it, we’d all buy one of these if they were available.

  • uray aldo juviar

    this round is used exclusively by Police Force in Indonesia. It is developed at the same time as their particular SS-1 Rifle variant called “SS-1 Sabara”. In the early 2000, the police force decided that they need a small size rifle that easily carried by patrolman, with enough firepower while reducing the risk of over penetration. So pindad made Sabara rifle based on SS-1 V5 micro rifle, with semi-auto only trigger group, chambered in 7.62 projectile necked up in 5.56 cases (i believe .300 blackout has not been developed yet back then). the magazine has waffle pattern look and is made from polymer to differentiate it with ordinary 5.56 stanag magazine.

    some years later, Pindad also produced another special version for Customs Service. it is called SBC-1 rifle (like the one you posted in the article). while also maintaining to have semi-auto only trigger group, this rifle is chambered in 5.56×45. it has blued finish. and reduce capacity metal magazine
    https://uploads.disquscdn.com/images/89b39bc3088cb6dda1760c7dc867dd27fb5e0016166a47ca1b5b7df7a8c2ff82.png https://uploads.disquscdn.com/images/02ab3e3d432af1e8764c6f373b8ec4945660a47b5e2555bbc344970005fa6428.jpg https://uploads.disquscdn.com/images/05b7143c676f5998477e99f367b11e6ecf3712736fc63a4267ba580545c12298.jpg

    • Timmah_timmah

      Great info – thanks for sharing with us!

  • Dan

    “why didn’t they go with .300 BLK..?” Because no matter how hard an Indonesian cop might try to chamber a 7.62×45 in a 5.56 rifle, it won’t go. No kaboomy in Jakarty.

  • So the gun used by Al Pachino in HEAT was an Indonesian rifle in a funny caliber? Who knew?
    j/k

  • DESTRO YAKISOBA

    What a weird cartridge!
    The pressure is reduced to “(22750 psi vs. 44,000 psi .30 Carbine) an initial velocity 16% lower but 25% less energy is achieved.”

    • El Duderino

      It’s almost as if they don’t spend all day wondering how to increase pressure/velocity/flash while reducing the weight/envelope of everything!

  • Avid Fan

    For what it matters, it sounds good to me. For a law enforcement use, it would seem ideal. When your dealing with a high population density you probably wouldn’t want .300 Winchester Magnum in your patrol rifles.

  • Lockmazter

    We’ve had that here, too, since 1941. we call it “.30 carbine”.

  • texas66

    I would expect a 7.62×45 to have a little more taper than what is pictured, it looks like a straight walled case to me. Could this really be a 9×45? hmmm… a 357 maximum in an AR-14 sounds interesting…

  • Andrew Marcell

    Why are they reinventing the US M1 carbine cartridge ?