I want to try a RDS on a pistol plus a suppressor host. Have a Gen 3 G34 in the safe so I ordered a G17.3 aftermarket slide with RDS cut for DP Pro. Have a DP Pro on hand. Ordered a threaded barrel. I need the small parts to complete the upper. Dug through the Glock parts bin and I have about half the needed parts on hand. Any feedback on best place to buy the assorted small Glock parts to finish the G17.3 upper? Just buy a "G17 upper completion kit"?