If that is a 1" Decelerator pad then stock probably was not cut.
The Gen-2 had a 13.5" LOP with the 0.5"-thick hard, black rubber, Ruger pad from factory.
I think all three generations of RSM had the same LOP from RUGER factory, 13.5".

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Ron aka "Rip" for Riflecrank Internationale Permanente
NRA Life Benefactor and Beneficiary
.458 Winchester Magnum, Magnanimous in Victory
THE WALKING DEAD does so remind me of Democrap voters. Donkeypox.