Zenitco B-31U/RPK Upper Rail - Gas Tube Picatinny Rail (RPK-Pattern)

The Zenitco B-31U/RPK is a CNC-milled D16T aluminum upper rail that forms a Picatinny rail over the gas tube and barrel on RPK-pattern sporting platforms and civilian carbines built on them. It does not block the iron sight line when using the standard mechanical sights.

It works together with the lower handguards B-20L, B-20U, B-23L and the DL-5 insert - including as part of the Sport-5U and Sport-8U kits - to build a full upper-and-lower rail system for optics, lights, and accessories.

Technical Specifications

Compatibility

For RPK-pattern sporting platforms and civilian carbines built on them. Used together with B-20L, B-20U, or B-23L lower handguards and the DL-5 insert. See the compatibility filter on this page to confirm fitment for your specific platform.

What's Included

• (1) Zenitco B-31U/RPK Upper Rail (selected color)
• (10) M5x7 Screws
• (1) User Manual

FAQ

Q: What platform is this for?
A: RPK-pattern sporting platforms and civilian carbines built on them.

Q: Does it block the iron sights?
A: No - the rail clears the mechanical sight line so you can still use standard iron sights.

Q: What lower handguard do I pair it with?
A: B-20L, B-20U, or B-23L, together with the DL-5 insert - also available as the Sport-5U / Sport-8U kits.

Q: How does shipping work?
A: US orders are fulfilled and delivered through our partner's domestic US logistics network. Delivery is not express, but it is reliable and fully guaranteed.