UTG PRO Model 4 S3 Stock Kit – AR-15/M4 Mil-Spec Buffer Tube

The UTG PRO Model 4 S3 Stock Kit delivers a stable shooting platform with improved cheek weld and length-of-pull adjustment for AR-15 and M4 pattern rifles. The six-position collapsible design allows shooters to quickly adapt stock length for different shooting positions, gear configurations, or multiple users while maintaining consistent eye relief and sight alignment.

This complete stock assembly is machined from reinforced polymer with a black finish and installs on mil-spec carbine buffer tubes. The kit includes the adjustable stock body, rubber buttpad for recoil absorption, and mounting hardware. The dual side release latches provide secure lockup at each position, and the ergonomic cheek rest offers repeatable face contact for accurate shooting. Compatible with standard mil-spec carbine buffer tubes (not included).

• Type: Collapsible buttstock assembly
• Compatible Firearms: AR-15, M4, and mil-spec carbine buffer tube platforms
• Material: Reinforced polymer
• Finish: Black
• Adjustable: Yes, 6-position
• Installation: Slides onto mil-spec carbine buffer tube, secured with dual side latches