The gun is in great condition and it looks like the barrel is a mismatch replacement from rearsenal. He has all the original acc. still in the wrappers and it comes with 4 10rd. mags. It also has like some kind of composite material for a bolt handle, its shaped exactly like the metal ones and is exactly the same except its white composite, i assume this is a replacement from rearsenal?
I am curious, where did you see Mas semi auto rifles with metal bolt knob?
On the Mas 49-56 sold from the 2nd reserve storage, mismatched barrels are the norm, most of the Mas 49-56 have been rearsenaled sometime up to three times.
The Mas semi autos rifles when properly maintained and with the correct military ammunition never "slamfired".
The cure against slamfire by firing pin strike on soft primed ammo is very simple, flatnose the firing pin! it will result in a shorter indent spread over a larger area of the primer.
The protrusion of the firing pin outside of the bolt face, acceptable is a minimum of 1,3mm and maximum is 1,8mm.
When using soft primers, the cheap trick is to take a long firing pin, and ground 0,5mm off its rounded tip flat to bring its protrusion from the maxi 1,8mm to the minimum 1,3mm with a much larger bearing area.
The cure against slamfire by worn trigger/hammer sear contacts is a new trigger block.
The cure against slamfire by a poorly adjusted trigger block otherwise sound is the vertical adjustment of the trigger block.
It is the most common origin of uncontrolled fire with Mas semi autos, resulting in occasional or permanent auto release of the hammer during bolt operation by hand or during shooting.
No amount of modification to the firing pin will cure it!
The vertical position of the trigger block in the receiver will condition the capacity of the auto sear to catch and lock the hammer during the bolt move to the rear.
If the auto sear do not catch and lock the hammer, the trigger sear will not engage either, and the hammer will fall to strike the firing pin when the bolt is closed.
The trigger must be depressed and the hammer locked at the back by the auto sear and not by the trigger sear when checking that the hammer is protruding from 0,8 to 1mm above the floor of the receiver.
If the protrusion checks out fine but the uncontrolled fire still occurs, the trigger block has worn out parts and must be replaced.
The hammer protrusion must be checked every time the stock/trigger block is removed from the receiver and also after long duration storage where the wood of the stock may have shrunk or swollen thus altering the trigger block vertical position.
kelt
