Below, left to right. (Left) Unmodified Philadelphia Ordnance feed ramp. The feed ramp is made with three cuts; one center, one left, and one right. As the picture shows, the center cut is slightly higher than the left and right cuts; leaving more material to be removed in the center of the feed ramp. (Right) The same feed ramp after modification by T&S Manufacturing.
Comparing extractor keyways. T&S Mfg keyway on left; original
Auto Ordnance Corp keyway on right (as seen in parts kit receiver nose piece,
with barrel removed).
