UTG Ops Ready S1 Mil-Spec Stock Kit for M4 Rifles, Includes Mil-Spec 6-Position Extension Tube, Buffer, Buffer Spring, Tear-Drop Ring and Castle Nut, Flat Dark Earth

UTG Stock Kit

UTG PRO Ops Ready S1 Mil-Spec Stock Kit for M4 Rifles, Flat Dark Earth

Generally ships in 7-14 days, subject to availability

Special Order

Generally ships in 7-14 days, subject to availability Estimated to Ship: 08/03/2025.

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Adorama Protect powered by Extend is available for purchases to customers in the United States only. Not available for international or U.S. territories purchases. Adorama Protect plans are available for ABS clients.

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UTG Stock Kit 

Upgrade your M4 rifle with the durable & reliable UTG Ops Ready S1 stock kit. Mil-Spec. Easy install. Shop now for enhanced accuracy & compatibility!

Bring precision and durability to your M4 rifle with the Ops Ready S1 Mil-Spec Stock Kit. Engineered for heavy-duty use, this kit is constructed with the tightest tolerance controls to ensure a secure fit and optimal function. The mil-spec stock is molded from impact-resistant, high-strength polymer in a sleek flat dark earth color, offering both aesthetic appeal and robust durability.The kit includes a mil-spec diameter extension tube, precision-machined from aircraft-grade aluminum for superior strength. Rolled threads and a flat dark earth Cerakote finish enhance corrosion and wear resistance, ensuring longevity even under harsh conditions.Experience enhanced shooting stability with the ergonomically chamfered, built-in rubberized butt pad and a slanted cheek rest. These features promote consistent firearm control, improving your shooting accuracy and comfort. The stock kit also boasts dual storage compartments with removable waterproof caps, providing dry storage for batteries (up to 8 CR123) or other essential shooting accessories. The integral ambidextrous sling loop and QD sling swivel housing cater to both left and right-handed shooters, enhancing its versatility.With an extended 8" length for increased length of pull, this stock kit is designed to enhance your firearm handling experience. The kit includes a polymer stock, mil-spec 6-position extension tube, buffer, buffer spring, tear-drop ring, and castle nut. Designed for snag-free performance, the stock kit features fully dehorned corners and melted contours for increased comfort. Upgrade your M4 rifle with the Ops Ready S1 Mil-Spec Stock Kit for a reliable, high-quality, and versatile shooting experience.

UTG Ops Ready S1 Mil-Spec Stock Kit for M4 Rifles, Includes Mil-Spec 6-Position Extension Tube, Buffer, Buffer Spring, Tear-Drop Ring and Castle Nut, Flat Dark Earth

Key Features

Protect your gear with Adorama Protect.* Learn more

UTG Ops Ready S1 Mil-Spec Stock Kit for M4 Rifles, Includes Mil-Spec 6-Position Extension Tube, Buffer, Buffer Spring, Tear-Drop Ring and Castle Nut, Flat Dark Earth

Save 5% Every Day†

Key Features

Protect your gear with Adorama Protect.* Learn more

Save 5% Every Day^†