UTG Model 4 Combat Ops S1 Stock Kit - Black

Upgrade or complete your AR-15 build with the UTG Model 4 Combat Ops S1 Stock Kit in a durable matte black finish. Engineered for reliability, smooth adjustability, and ergonomic tactical support, this complete stock assembly gives you everything needed to install a military-style buttstock onto your carbine-length lower receiver.

Featuring a 6-position adjustable/collapsible design, the S1 stock allows shooters to quickly adjust the length of pull (LOP) for optimal eye relief, body armor clearance, or customized shooting comfort.

Key Features & Benefits:

• 6-Position Adjustability: Quickly adjust length-of-pull to suit any shooter, gear setup, or operational need.
• Complete Assembly Kit: Ships fully equipped with the buffer tube, spring, buffer, end plate, and castle nut—no extra parts required.
• AR-15 / M4 Compatibility: Engineered specifically for standard carbine-length lower receivers for a snug, secure fit.
• Durable Black Finish: Non-reflective tactical finish designed to withstand harsh range and field environments.

Package Includes:

• 1x UTG Model 4 Combat Ops S1 Buttstock (Black)
• 1x Receiver Extension Tube (Buffer Tube)
• 1x Recoil Buffer
• 1x Carbine Buffer Spring
• 1x Tear-Drop End Plate (Receiver End Ring)
• 1x Castle Nut

Specifications:

• Platform Compatibility: AR-15 / M4
• Finish: Matte Black
• Type: 6-Position Adjustable / Collapsible Stock Assembly