Drug cartel DIY open-bolt automatic rifles

    .50 caliber machine guns seized in Rio de Janeiro.

    A development in improvised weaponry spearheaded by South America’s drug cartel armorers has been the blow-back operated open-bolt automatic rifle. The simple solution to the usual intricacies of a typical assault rifle’s locking, delay or gas operation is to essentially make a scaled-up submachine-gun with a very heavy bolt capable of operating at much higher pressures. Using a fixed firing pin and firing from the open-bolt position allows for relatively simple construction with minimal components. Police helicopters are rumored to be some of the intended targets.




    openboltrifle9295improgunsbrazilianrifle improguns.blogspot.com



    A previously seen example surrendered in Bogota: