Most all Sig Sauer P-Series pistols manufactured after 2011 come equipped with the SuperStrut compatible mainspring seat.
Those manufactured before 2011 will most likely require this updated mainspring seat. Check your factory box for the manufacturing date.
(1)
Average rating 6 out of 10
( based on 1
review )

Seat
Hammerstrut seat The exact same, as one in a E2’s grip kit...... No color or alloy........Black plastic