UTG PRO MODEL4 S1 Mil-Spec Carbine Stock – AR-15/M4 Compatible

The UTG PRO MODEL4 S1 is a six-position collapsible carbine stock engineered for AR-15 and M4 platforms, delivering adjustable length of pull for shooters of varying sizes or when wearing body armor. The reinforced polymer construction balances durability with reduced weight, while the mil-spec buffer tube compatibility ensures straightforward integration with standard AR components.

Features a non-slip rubberized buttpad for secure shouldering and recoil absorption. The stock locks firmly into any of six adjustment positions via a spring-loaded release lever. Installation requires a standard mil-spec carbine buffer tube (not included) and castle nut. Compatible with both commercial and mil-spec lower receivers when paired with the appropriate buffer tube.

• Type: Collapsible Carbine Stock
• Compatible Firearms: AR-15, M4, mil-spec carbine buffer tubes
• Material: Reinforced Polymer
• Finish: Black
• Adjustable: Yes (6 positions)
• Installation: Requires mil-spec carbine buffer tube, castle nut, and end plate (not included)