I hope you ordered the correct assembly. Depending on when yours was made, there are 2 different recoil guides & plastic buffers.so i ordered the whole little assembly for 15 bucks plus ship brought it to 21 and some change
will drop it and lock tight the screws so it can never ever be taken apart again.
it is a fantastic shooting piece of ****
Sent from my moto z4 using Tapatalk