Ruger American ranch 16”

[Harpoon1]

My RAP Grendel would not cycle or feed worth a damn for me with a C-Products mag. Which worked best in my AR-Grendel’s. Long story short, someone on the forum suggested modifying the mag spring pressure. I cut 2 coils off the mag spring and it runs like a top now, unreal. I can’t make it jam. Amazing. I can’t explain but, it worked like a charm for me. The mag is still sloppy and rocks in the magwell but, it doesn’t seem to matter now. YMMV.