
Availability: In Stock
The Leapers Inc. UTG Pro Model 4 S2 mil-spec stock kit gives your AR-pattern rifle a lightweight, ergonomic upgrade with the fit and function shooters demand. This complete stock kit includes everything you need—polymer stock, mil-spec extension tube, buffer, buffer spring, tear-drop ring, and castle nut—making installation straightforward whether you're building a new rifle or refreshing a current setup.
Built in the USA with precision engineering and tight tolerances, the UTG Pro Model 4 S2 combines impact-resistant polymer construction with a machined aluminum extension tube that's anodized for durability in the field. The stock features an integrated rubberized butt pad and slanted cheek rest designed to improve shooting stability and help you maintain consistent control shot after shot. Its slim profile and extended 7.5" length increase your length of pull, while fully dehorned corners and melted contours eliminate snag points and add comfort during handling and carry.
Versatility is built in: ambidextrous sling loop and QD sling swivel housing work equally well for left- or right-handed shooters, and the design pairs cleanly with UTG's super slim handguards for a balanced, efficient platform. Whether you're running a duty rifle, competition gun, or hunting build, this mil-spec stock kit delivers the reliability and ergonomics serious shooters expect without compromise.
| Brand | Leapers, Inc. – UTG |
| Model | UTG Pro Model 4 S2 |
| Stock Type | Mil-spec |
| Color | Black |
| Stock Material | Impact-resistant polymer |
| Extension Tube Material | Aircraft-grade aluminum, anodized |
| Stock Length | 7.5" extended |
| Kit Includes | Polymer stock, mil-spec extension tube, buffer, buffer spring, tear-drop ring, castle nut |
| Sling Features | Ambidextrous sling loop, QD sling swivel housing |
| Design | Fully dehorned, melted contours, slanted cheek rest, rubberized butt pad |
This is a complete kit. It includes the polymer stock, mil-spec extension tube, buffer, buffer spring, tear-drop ring, and castle nut—everything required for installation on a standard mil-spec AR-pattern lower receiver.
The UTG Pro Model 4 S2 emphasizes ergonomics and comfort: it features a rubberized butt pad, slanted cheek rest for shooting stability, a slim profile, and fully dehorned corners to eliminate snags. The aluminum extension tube is precision machined and anodized for corrosion resistance, and the design pairs well with slim handguards for a balanced platform.
Yes. The stock includes ambidextrous sling loop and QD sling swivel housing, making it functional and accessible for both left- and right-handed shooters.
The extended stock length is 7.5", providing increased length of pull for a wider range of shooter sizes and clothing configurations.



SKU: 115705004 • Width: 5.75in • Height: 2.5in • Depth: 9.5in • Weight: 1.56oz





Availability: In Stock
The Leapers Inc. UTG Pro Model 4 S2 mil-spec stock kit gives your AR-pattern rifle a lightweight, ergonomic upgrade with the fit and function shooters demand. This complete stock kit includes everything you need—polymer stock, mil-spec extension tube, buffer, buffer spring, tear-drop ring, and castle nut—making installation straightforward whether you're building a new rifle or refreshing a current setup.
Built in the USA with precision engineering and tight tolerances, the UTG Pro Model 4 S2 combines impact-resistant polymer construction with a machined aluminum extension tube that's anodized for durability in the field. The stock features an integrated rubberized butt pad and slanted cheek rest designed to improve shooting stability and help you maintain consistent control shot after shot. Its slim profile and extended 7.5" length increase your length of pull, while fully dehorned corners and melted contours eliminate snag points and add comfort during handling and carry.
Versatility is built in: ambidextrous sling loop and QD sling swivel housing work equally well for left- or right-handed shooters, and the design pairs cleanly with UTG's super slim handguards for a balanced, efficient platform. Whether you're running a duty rifle, competition gun, or hunting build, this mil-spec stock kit delivers the reliability and ergonomics serious shooters expect without compromise.
| Brand | Leapers, Inc. – UTG |
| Model | UTG Pro Model 4 S2 |
| Stock Type | Mil-spec |
| Color | Black |
| Stock Material | Impact-resistant polymer |
| Extension Tube Material | Aircraft-grade aluminum, anodized |
| Stock Length | 7.5" extended |
| Kit Includes | Polymer stock, mil-spec extension tube, buffer, buffer spring, tear-drop ring, castle nut |
| Sling Features | Ambidextrous sling loop, QD sling swivel housing |
| Design | Fully dehorned, melted contours, slanted cheek rest, rubberized butt pad |
This is a complete kit. It includes the polymer stock, mil-spec extension tube, buffer, buffer spring, tear-drop ring, and castle nut—everything required for installation on a standard mil-spec AR-pattern lower receiver.
The UTG Pro Model 4 S2 emphasizes ergonomics and comfort: it features a rubberized butt pad, slanted cheek rest for shooting stability, a slim profile, and fully dehorned corners to eliminate snags. The aluminum extension tube is precision machined and anodized for corrosion resistance, and the design pairs well with slim handguards for a balanced platform.
Yes. The stock includes ambidextrous sling loop and QD sling swivel housing, making it functional and accessible for both left- and right-handed shooters.
The extended stock length is 7.5", providing increased length of pull for a wider range of shooter sizes and clothing configurations.
SKU: 115705004 • Width: 5.75in • Height: 2.5in • Depth: 9.5in • Weight: 1.56oz


