Original annealed McF revisited

I got this 31 years ago...$450.00 Gas cylinder was wide base, saw cut, and gas crew wasn't single slot..rear sight was upgraded..fork long, WW2 field upgrade? rest was as is..
https://www.milsurps.com/images/impo...g?t=1278347855
https://www.milsurps.com/images/impo...g?t=1278347907
https://www.milsurps.com/images/impo...g?t=1278347986
https://www.milsurps.com/images/impo...g?t=1278348069
https://www.milsurps.com/images/impo...g?t=1278348116

Breach is in white, 2 ordnance bombs, no wheel barrel top..in explosion?
https://www.milsurps.com/images/impo...g?t=1278348238
https://www.milsurps.com/images/impo...78348311-1.jpg
https://www.milsurps.com/images/impo...g?t=1278348352
https://www.milsurps.com/images/impo...g?t=1278348424
https://www.milsurps.com/images/impo...g?t=1278348490
https://www.milsurps.com/images/impo...g?t=1278348564