No. The Strike Industries AR-10 Shift Takedown Pins are designed to fit most AR10/LR-308 forged and billet receivers. It will not fit Armalite AR-10's.
1st pin is 1.67" long, 0.27" wide. And 1.51" from the base of the head of the pin, to the end.
2nd pin is 1.21" long, 0.27" wide. And 1.05" from the base of the head of the pin, to the end.
Strike Industries states that there is no guarantee the AR-10 Shift Pins will be compatible with all AR-10/308/SR25 lower receivers.