The Firing Line Forums - View Single Post - French MAS 49/56 Ammo-firing issue .308 converted

arcticap · September 12, 2018, 02:45 PM

I don't know if it's true, but I recall a poster once suggested that a Browning Model A5 shotgun mainspring might work as a [possibly stiffer] replacement.
I also spoke with a friend who worked at a spring manufacturing company.
He basically told me that he could probably replace any spring if he was able to personally evaluate its strength and spec's. in detail.
That is if a spring didn't simply need to be shortened or otherwise altered.
Although he did say that if a new spring was needed to fix a malfunction, it could require some trial & error in order to get it right, i.e.-to make it the right strength.
This involved a .308 MAS that had some cycling issues, but it could also pertain to any spring that was broken or needed replacement.

September 12, 2018, 02:45 PM	#12
arcticap Senior Member Join Date: March 15, 2005 Location: Central Connecticut Posts: 3,166	I don't know if it's true, but I recall a poster once suggested that a Browning Model A5 shotgun mainspring might work as a [possibly stiffer] replacement. I also spoke with a friend who worked at a spring manufacturing company. He basically told me that he could probably replace any spring if he was able to personally evaluate its strength and spec's. in detail. That is if a spring didn't simply need to be shortened or otherwise altered. Although he did say that if a new spring was needed to fix a malfunction, it could require some trial & error in order to get it right, i.e.-to make it the right strength. This involved a .308 MAS that had some cycling issues, but it could also pertain to any spring that was broken or needed replacement. Last edited by arcticap; September 12, 2018 at 02:57 PM.