Despite all positive characteristics, including durability, well shooting characteristics, AK series has one disadvantage - it's absence of RIS rails at the upper reciever and, as a result, you need to mount RIS-adaptor at the Soviet-type "lastochkin hvost" optic sight mount, which is heavy, or install RIS rail at the gas tube.
That's why ZenitCO has created B-33 rail, which is mounted instead of basic upper receiever and forms RIS rail, which allows to install all sights types, including optic ones.
Due to the hard fixation, the rail doesn't shake and it helps user to avoid sight's re-adjustment even in case of weapon's hard shaking when you are running or shooting.
1. Compatible and may be installed at ZenitCo B-10M and B-30 forends.
2. Fixed hard, allows to avoid sight re-adjustment.
3. Doesn`t conflict with standard mechanic sights .
4. ISN`T COMPATIBLE WITH AEG .
Weight: 215 gram