RS Regulate114465732
RS Regulate Rear-Biased Yugo Modular Lower Handguard Adapter$143.74
Availability: In Stock
The RS Regulate Full-Length Yugo Modular Lower Handguard System is a precision optic mount engineered to solve a real problem: mounting modern tactical optics on Yugo and Serbian AK-pattern rifles like the Zastava M21, PAP, NPAP, and OPAP. This is the lower component of RS Regulate's modular AK optic mounting solution—a system that lets you attach AR-15 pattern optics to Kalashnikov platforms without permanent rifle modifications or reliability compromises.
Built from 6061 T6 aluminum with a matte black hardcoat anodized finish, this lower mount attaches directly to your rifle's side rail and pairs with an optic-specific upper mount (sold separately). The full-length design fits Yugo rifles equipped with front-biased or full-length lower rail configurations—check your rifle's rail layout to confirm fit. Once married to the correct upper mount, the system lets you dial in both vertical over-bore height and front-to-back positioning, so you can dial in the eye relief and cheek weld that work for you. Installation hardware is included; no gunsmithing required.
The titanium locking mechanism is low-profile and engineered not to protrude from the mount or interfere with your triggerguard or rifle function. RS Regulate designed this system specifically to preserve the mechanical integrity and reliability of the rifle—nothing gets drilled, tapped, or replaced. If you're running a Yugo AK and want a solid, adjustable optic platform using optics you already own or can source affordably, this lower mount is the foundation of a setup that actually works.
| Brand | RS Regulate |
| Product Type | Lower Optic Mount (Modular System) |
| Rifle Compatibility | Yugo/Serbian AK pattern (Zastava M21, PAP, NPAP, OPAP) |
| Mount Interface | Side rail attachment |
| Material | 6061 T6 aluminum |
| Finish | Matte black hardcoat anodized |
| Locking Mechanism | Titanium (low-profile, non-protruding) |
| Adjustments | Over-bore height and front-to-back positioning |
| Includes | Installation hardware |
This lower mount is designed for Yugo and Serbian pattern AK rifles, specifically the Zastava M21, PAP, NPAP, and OPAP models. It attaches to the side rail of these rifles. Confirm your rifle has either a front-biased or full-length lower rail configuration for proper fit.
Yes, this is the lower component only. You must purchase an optic-specific upper mount separately—RS Regulate makes uppers for various tactical optic models. The upper mount interfaces with your chosen optic and couples to this lower mount to create the complete system.
No. The RS Regulate system is designed to mount on the existing side rail of your rifle without requiring drilling, tapping, or permanent modifications. It does not interfere with reliable rifle operation. The low-profile titanium locking mechanism does not protrude into the triggerguard or trigger area.
Once the lower and upper mounts are paired, you can adjust both the vertical over-bore height and the front-to-back position of the optic to achieve the correct eye relief and head position for your shooting style.
SKU: 114463856 • Width: 3.25in • Height: 1.25in • Depth: 7.75in • Weight: 0.31oz
Availability: In Stock
The RS Regulate Full-Length Yugo Modular Lower Handguard System is a precision optic mount engineered to solve a real problem: mounting modern tactical optics on Yugo and Serbian AK-pattern rifles like the Zastava M21, PAP, NPAP, and OPAP. This is the lower component of RS Regulate's modular AK optic mounting solution—a system that lets you attach AR-15 pattern optics to Kalashnikov platforms without permanent rifle modifications or reliability compromises.
Built from 6061 T6 aluminum with a matte black hardcoat anodized finish, this lower mount attaches directly to your rifle's side rail and pairs with an optic-specific upper mount (sold separately). The full-length design fits Yugo rifles equipped with front-biased or full-length lower rail configurations—check your rifle's rail layout to confirm fit. Once married to the correct upper mount, the system lets you dial in both vertical over-bore height and front-to-back positioning, so you can dial in the eye relief and cheek weld that work for you. Installation hardware is included; no gunsmithing required.
The titanium locking mechanism is low-profile and engineered not to protrude from the mount or interfere with your triggerguard or rifle function. RS Regulate designed this system specifically to preserve the mechanical integrity and reliability of the rifle—nothing gets drilled, tapped, or replaced. If you're running a Yugo AK and want a solid, adjustable optic platform using optics you already own or can source affordably, this lower mount is the foundation of a setup that actually works.
| Brand | RS Regulate |
| Product Type | Lower Optic Mount (Modular System) |
| Rifle Compatibility | Yugo/Serbian AK pattern (Zastava M21, PAP, NPAP, OPAP) |
| Mount Interface | Side rail attachment |
| Material | 6061 T6 aluminum |
| Finish | Matte black hardcoat anodized |
| Locking Mechanism | Titanium (low-profile, non-protruding) |
| Adjustments | Over-bore height and front-to-back positioning |
| Includes | Installation hardware |
This lower mount is designed for Yugo and Serbian pattern AK rifles, specifically the Zastava M21, PAP, NPAP, and OPAP models. It attaches to the side rail of these rifles. Confirm your rifle has either a front-biased or full-length lower rail configuration for proper fit.
Yes, this is the lower component only. You must purchase an optic-specific upper mount separately—RS Regulate makes uppers for various tactical optic models. The upper mount interfaces with your chosen optic and couples to this lower mount to create the complete system.
No. The RS Regulate system is designed to mount on the existing side rail of your rifle without requiring drilling, tapping, or permanent modifications. It does not interfere with reliable rifle operation. The low-profile titanium locking mechanism does not protrude into the triggerguard or trigger area.
Once the lower and upper mounts are paired, you can adjust both the vertical over-bore height and the front-to-back position of the optic to achieve the correct eye relief and head position for your shooting style.
SKU: 114463856 • Width: 3.25in • Height: 1.25in • Depth: 7.75in • Weight: 0.31oz