Four mil-spec Picatinny rails. Rail system locking design includes lower connecting walls mating with upper channels for solid and secure fit. Lower quad-rail system to secure barrel and upper quad-rail system to secure gas tube. No gunsmith or tool required. Zero-retention capability for all accessories installed on the rails. Hard anodized finish. 12 rubber rail guards included. More photos on request.I accept cash, money orders, cashier's checks. Bidpay accepted too (add 3%). Rich.
Trades Accepted: No
I ship nongun items with US mail. I accept all credit cards, also cash, personal checks, company checks, money orders, cashier's checks, and bank checks. No credit card fee.