CharlesWA
Member
Possibly the pin and spring but latch is different
I just picked up the new Simple Weapons Solutions 15-22 latch when I ordered my brass deflector last week. It includes a pin but no spring. I've got a Tacticool FDE Charging handle on order. I think you can see where I'm going with this...

I did put a DPMS AR-15 latch spring ($1.99, limit 2!) on my Midway order last weekend. Worst case I have a spare AR-15 latch spring now. If it's the wrong size I could call S&W and get one on order with them but shipping is going to be more than the part no doubt.