I have an oral history book, "Death March: The Survivors of Bataan". In it, one of the interviewees claimed that he and his men traded their Garands to the Filipinos and rear units for Springfields and Enfields. My recollection is that they felt the Garand was fine on the range but unreliable in battle, and they needed something they knew would work no matter what. While it wasn't stated, I imagine the clip issue was involved as well.
The production of this movie was mentioned as well; I have also seen it called "Down With The Stars And Stripes". The interviewees mentioned being issued "new" uniforms and captured rifles, which they made sure to sabotage when the guards weren't looking.