Slide stop can be easily replaced on the 411... https://www.midwayusa.com/product/1...GDBOtJsmm7JKEFXS3Qrp8GJ7GIXNPXo3k1&pid=211960
That's actually a decent price for the assembly. The last Parts List I downloaded from the factory was in 2013, and the retail cost then was $39.60 (armorers only got a 26% discount). Blackened stainless MIM at that time, from what they told me.