
Upper set
Flash hider: dull powder finish, narrow knurled edge
Booster cone: squared ends more pointed tip
Barrel bearing: shiny stainless steel? Groove marked with “Bâ€
Lower set
Flash hider: shiny finish, wider knurled edge,
S113-19152 hyphenated 9 digit serial number
Booster cone: rounded ends, flat tip, marked “11â€
Barrel bearing: no groove smaller diameter hole