Assembling Your New CZ 712 G3
Congratulations, you’re the proud new owner of a CZ 712 G3. Before you hit the range, here’s a quick overview of assembling the barrel.
After checking that the piston is correct for the ammo, you’re ready to assemble your shotgun. This task is simplest if you hold the stock and receiver in your dominant hand and remove the magazine cap and forend with the other hand. Remove the threaded collar on the magazine by turning it counterclockwise past two sets of threads. Take note of the small silver detent ball in the face of the collar; it faces the receiver.
The CZ 712 G3 ships with a bright orange plastic bolt stop installed. Remove it by pulling back on the bolt handle and pushing the stop through the ejection port.
With the bolt still partially pulled back (about an inch of gap from the bolt face to the front of the receiver ejection port), it’s time to install the barrel. Slide the barrel lug over the magazine tube, guiding the barrel extension into the receiver. It will drop into place. With the detent ball facing the receiver, thread the collar onto the magazine—past the second set of threads—until the detent ball clicks against the barrel lug. The barrel is now secure.
The forend slides over the magazine tube; make sure to seat it into the receiver. Finally, install the mag cap to secure the entire assembly. It, too, uses a detent ball system, so hearing audible clicks tells you that the cap has contacted the forend.
You’re all set! Hit the range confidently, knowing that the new CZ 712 G3 will perform better than ever.