AK-74 Receiver block decesion help.

[Russian Enthusiast]

I'm putting a UBR stock on my AK-74 and I have to replace the receiver block and there are two different ACE receiver blocks that will go on the weapon. One is a universal receiver block and it adds about 1"/1-1/4" to the receiver and the other is a compact receiver block, it is a flush mount receiver block. In order to mount the UBR I have to use the ACE CAR-15 stock block pig nose, but I don't know if it will mount onto either receiver block. Is there anyone who knows for sure that I can use either receiver block in conjunction with the stock block?

[Mr blasty]

It will mount to both blocks and comes with all neccesary hardware.