Possibly, but there were a lot of production quality problems with the M14 and McNamara was gunning for the Springfield Armory, and IIRC it closed down soon after M14 production stopped. Had the FAL been made in the USA and avoided the production problems, maybe it would have lasted longer.
I agree. It would have been more difficult to claim the FAL was a "bad" design considering over 100 nations had adopted the rifle, and FAL had shown in the rifle tests of the 50's that they were persistent and would not give up. They would have been on the front lines Lobbying Congress and OSD with facts and figures which would have blunted the attack of the Colt Lobbyists.
As for production quality problems the transition from Full Scale Development to Production is one of the riskiest transitions in the lifecycle of a system. There are always issues, delays, wrong machines, wrong materials, improperly dimensioned parts, people not trained, subcontractors holding things up, you name it. Nothing gets out the door in time, and the first items always have problems. The fact that people don't know this is because it is not widely mentioned. The problems can be hyper ventilated by critics to the point the program gets shut down.
This is also why it is not a good idea to buy a first year production automobile. They always have more problems than following years.
And if you have ever noticed for any peacetime military procurement, competitors and critics always attack in that time period to get the weapon system terminated. There is a lot of dirty laundry that can be wavied about in the air. Makes for good scandals and copy. For example, in the 80's the lying liberal press was trying to kill off the M1 Abrams tank by exaggerating the problems with the first fielded units. Remember that? Anytime there is a new Major weapon system production, you will hear similar problems, and that included the M1 Garand. It almost did not survive the assault by Melvin Johnson. The War Department had to lobby Congress. Melvin Johnson did not have the financing of lets say a Colt, Lockheed, Grumman, etc. If he had, things might have gone differently.