Precision machined with maximum strength Four 6” long mil-spec Picatinny rails with 14 slots each for versatile accessory applications Clever rail system locking design includes lower connecting walls mating with upper channels to achieve the most solid and secure fit- Lower quad-rail system to secure barrel Upper quad-rail system to secure gas tube Simple and friendly installation, no gunsmith or tool required Great zero-retention capability for all accessories installed on the rails Intensively tested by field experts under extreme heat and sub-zero temperature and demonstrates most satisfactory performance Specially designed groove rail top for optimal viewing through front sight Well designed with tight tolerance and guaranteed best fit for standard Romanian AK’s and its variants Hard anodized finish for wear resistance Great quality UTG rubber rail guards included for comfort