FN FAL 5.56mm Conversion Kit

Earlier this month I wrote about Argentina’s experiments converting the FN FAL from 7.62mm to 5.56mm. Ronaldo Olive sent me an article he wrote back in the mid-1980s about a FN FAL 5.56mm kit developed in Brazil …

… from the November 1986 issue of the extinct EAGLE magazine, of still-strong Harris Publications, on a 5.56 mm FAL coneversion kit created in Brazil in 1986 by a small Rio de Janeiro-based company called Brasarms Indústria e Comércio S.A. It was the brainchild of local gun wizzard Olympio Vieira de Mello Filho, designer of the Mekanika Uru 9 x 19 mm submachinegun, a short time before his death. Although officially tested and approved by the Brazilian Army at the Marambaia Proving Ground, somehow the clever device never found its way into the market.

The entire article is embedded below. You can also view it at Scribd.com.

Below are some additional photos of FN FAL rifles equipped with the conversion kit …





Brazil ended up adopting the IMBEL MD rifle, locally made FN FAL chambered in 5.56mm NATO.

Many thanks to Ronaldo for the information and photos.

Steve Johnson

Founder and Dictator-In-Chief of TFB. A passionate gun owner, a shooting enthusiast and totally tacti-uncool. Favorite first date location: any gun range. Steve can be contacted here.


  • big daddy

    This would make a lot of sense for other calibers. For instance the 6.8mm & 6.5mm rounds would work much better than the cramped confines of the AR receiver. As well as some other wildcat rounds. Looks like an untapped source of conversion kits.

  • 5

    Bet it still weighs just shy of a lead brick. FAL 5.56 would not have the title of right arm of the free world. Maybe the left foot of the free world.

  • Jib Halyard

    For gods sakes why?? if you can’t handle a bruised cheekbone from a day at the ranges, you’re just not ready to graduate from your little AR15

    • Suburban

      Because maybe you don’t need to unleash a bullet that’s still quite deadly at 1000 yards? Because maybe you can’t afford to shoot 150 rounds of .308 every month? Because maybe you can’t realistically carry 8 steel magazines full of 7.62x51mm?

      • Tomy

        Never managed to bruise a cheekbone, but I also prefer my M1A (Civilian legal M14). Sure the bullet’s deadly to a thousand yards, but my rifle is capable of accurately delivering it at that range. In tactical terms, that’s called “force multiplication” if you’re doing it, and “cheating” if it’s being done TO you. If you can’t afford to shoot 150 rounds a month? Welcome to the club. Just make every round count and learn to reload. If you cannot realistically carry 160 rounds of 7.62 NATO, then you’re just not ready to graduate from your little AR15… or, you know, maybe you should learn to miss less.

  • William

    Thats just to cool for school

  • Lance

    Yeah the Brazilian army uses them there good but the FNC offered FAL users with a better FN 5.56mm rifle.

    Brazilian Army