Mat 49 Viet Modified

Mat 49 silenced variant fitted with a suppressor.
Mat 49 viet modified. What am i missing here. The mat 49 is blowback operated and box magazine fed with a rate of fire of 600 rounds per minute on full auto. The mat 49 was used by the viet cong during the vietnam war but they converted the 9mm parabellum rounds to 7 62mm tokarev. Russian 7 62 25 fmj 85gr.
4 magazines weight per magazine. Why use french original over viet modified mat 49. Spare parts were still produced in the 1970s the gun being used by the viet cong. Russian 7 62 25 fmj 85gr rounds per magazine.
It had a longer barrel and a higher rate of fire 900 rpm. The gun has flip up l shaped sights marked for a range of 50 and 100 meters. Altogether the weapon is a bit on the heavy side but its weight helps reduce recoil. Minus magazine the mat 49 weighs about 3 5 kilograms 7 7 pounds which makes it somewhat heavy for a submachine gun.
Fully automatic rate of fire. 0 73 kg handling weight. The mat 49 was introduced in 1949 to the french armed forces and remained in service until it was replaced by famas in 1978. The mat 49 54 a modified mat 49s manufactured for police forces had two triggers allowing use of full auto fire or single shots but most were manufactured as full auto only.
Altogether the weapon is a bit on the heavy side but its weight helps reduce recoil. The mat 49 has a blowback design heavy mainspring 7 7 pound weight when empty and a 1 3 pound bolt. The mat 49 had a modified version that used two triggers for different rates of fire. Viet modified uses a more powerful cartridge with a higher rate of fire yet the recoil seems identical.
Viet modified mat 49 7 62mm full name here ammunition ammo type.