Ruger Mini-14 and Mini-30
From left to right, Ruger, ProMag Steel, John Manson, Thermold, TAPCO, ProMag polymer.
1. Would not lock on a closed bolt - ProMag Steel, John Manson, Thermold
2. Would load first bullet without assistance - ProMag Steel, Ruger, TAPCO, John Manson
3. Loaded all rounds without FTF - All but...