Saiga Rifle Quad Rail System by TacFire

Solid aircraft aluminum alloy construction with precise CNC machining
Top/bottom 2-piece innovative design with lower/upper pieces mating/locking feature
Includes 16 top slots, 22 left/right slots and 21 bottom slots
Top rail with V-cut allowing use of iron sight
Great zero retention capability for all accessories installed on the rails
Easy installation with no modification to the barrel
Made in China

Here are the specs