Builder Armory
Frankenine - Roller Delay Build

// Range Log · Non-NFA Other · 9mm

2026-07-19

TrainingNo Malfunctions
198
rounds
124 gr

Since Matador Arms is so fucking slow to deliver their products, I ordered a bear creek full upper receiver. This is a 9mm captured recoil system that is cheap. The price was $209 in total. I was significantly surprised by how good this upper felt and how well it shot. I ordered the 10.5" barrel and used it on my MAT9 build Xiphos lower and it ran great. Some things to note, before shooting i reseatted all the bolts with loctite. The first round failed to eject ( i forgot to lube everything). After that one malfuntion the gun ran great. I let a friend try it and he loved it but something strange happened with the trigger. On occassion it started doing 3 round bursts. I think there may be some bolt bouncing and the Rave PCC trigger is not locking during the reset. Sounded cool but a little alarming. Will keep an eye on it. I also noticed that the BAD lever bolt catch did not work with this setup so ill be switching to a standard bolt catch. Im wondering if this had something to do with the auto fire. Overall impressed with the BCA upper. Would recommend as there was no failures and it shot as good as any other one of my PCCs