UTG PRO Model 4 S1 Stock Kit – AR-15/M4 Mil-Spec Buffer Tube

The UTG PRO Model 4 S1 Stock Kit delivers improved cheek weld and shouldering consistency for AR-15 platform rifles. The 6-position collapsible design allows length-of-pull adjustment from 10.5" to 13.5", making it adaptable for shooters of different sizes or when wearing tactical gear. Dual quick-detach sling swivel sockets provide flexible carry options.

Constructed from reinforced polymer, this complete stock assembly installs on mil-spec carbine buffer tubes and includes all necessary mounting hardware. The textured rubber buttpad reduces felt recoil and prevents slipping during shouldering. No gunsmithing required—drop-in installation using standard takedown pins.

• Type: 6-Position Collapsible Buttstock Kit
• Compatible Firearms: AR-15, M4, and rifles with mil-spec carbine buffer tubes
• Material: Reinforced Polymer
• Finish: Black
• Adjustable: Yes (6 positions, 10.5"–13.5" LOP)
• Installation: Drop-in, mil-spec buffer tube compatible
• Features: Dual QD sling sockets, textured rubber buttpad