The B-21U Handguard rail is a milled product designed for Vityaz-SN and similar models, including Saiga-9 and TR9 Paradox rifles.

Specifications:

Material: D16T aluminum alloy

Weight: 130 ± 10 g

Overall Dimensions: (165 x 38 x 40) ± 5 mm

Operating Temperature Range: -50°С to +50°С

In the Kit:

Compatible Accessories (Basis Rail):

• B-2, B-2L, B-2M, B-2U Picatinny rails
• A-1L and A-2L sling mounts
• RL-1 hand stoppers
• NPN-2 Basis rail covers
• FP-3 wire holders
• B-19 and B-19N upper handguards
• B-22 rear sight rail

Compatible Accessories (Picatinny Rail):

• RK-0, RK-1, RK-2, RK-4, RK-5, RK-6 grips
• Tactical flashlights
• Laser pointers
• Bipods

Benefits during Operation:

- Improves cooling of the barrel from the receiver to the gas tube
- Enables additional equipment attachment

Installation Instructions:

1. Disassemble the weapon and remove the standard handguard.
2. Install the "B-21U Handguard" firmly in place of the original. Steps:
   • Attach the regular handguard retainer to B-21U.
   • Align B-21U with the receiver.
   • Use a spacer and carefully hammer B-21U into the receiver slot.
   • Close the handguard retainer lever.
3. Reassemble the rifle.

Note: Avoid filing the handguard during installation to prevent any misalignment or instability.

The manufacturer reserves the right to make changes to the product design or configuration without prior notice, provided these do not adversely affect technical specifications or product quality and are intended to improve design or production methods.