BAN NEWS .308
Mas 49-56 left side view of the receiver with two rebuild marks indicated by the, P date in a box. 1983 and 1987
Master Serial Number is vertical on the left edge of the receiver on the Mas 49-56
Note this is a Century monkey conversion .308 Mas 49-5 see
https://www.gunboards.com/threads/how-t ... -56.97271/
Century Arms Inc. converted a number of Mas 49/56's and these are problematic to say it nicely. There reliability is a hit or miss in terms of feeding, jams and miss fires. Actual French conversions to 7.62 are very rare in the US.
Potential Problem Areas
The vast majority of the problems associated with MAS 49/56 arise from bubba’ed .308 conversions. Century Arms converted a bunch of imported MAS 49/56s to .308. Win. in the 1990s and the results were pathetic. Some work, some don’t. Bottom line: stay away from CAI conversions unless you can verify that they are “shooters.”
Another common source of problems stems from the use of commercial 7.5x54mm ammunition made in countries other than France. These rounds have been known to produce burst fire (two or three rounds at a time) because of more sensitive primers. For a while, it was possible to buy a commercial titanium firing pin to replace the heavy steel factory firing pin. These commercial pins were much lighter and generally cured the problem of burst fire on these weapons when using soft primers. Unfortunately, the supply of these titanium pins has dried up.
According to internet lore, it is also possible to prevent the “slamfire” issue by shortening the firing pin by approximately 0.5 mm (from 1.3mm down to 0.8mm), or by modifying the bolt to accommodate a firing pin return spring. I have no experience with these modifications, and therefore cannot endorse them. Having said that, I fired 30 rounds of Prvi-Partisan through the test gun without incident (I did wait until everybody else had left the range to try them out – if the rifle was going to go cyclic on me, I didn’t want to have anyone else there to witness it!).
Finally, excess grease or oil can interfere with the free-floating firing pin. Like an SKS, the firing pin channel should also be kept free of cosmoline, sticky grease or oily residues so that it can move about freely.
source:
https://www.thetruthaboutguns.com/gun-r ... 1949-1956/
Gun Review: MAS-49/56 Fusil Semi-Automatique (Modèle 1949 – 1956)
BY JOE GRINE |AUG 30, 2011
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Here is a normal 7.5 French Mas receiver, Left side, no rebuild marks.
To old to fight and to old to run, a Jar head will just shoot and be done with you.
Translation
