UTG Pro Ops Ready S4 Stock Kit for AR-15 – Compact Mil-Spec, Includes Buffer Kit, Black (RBUS4BM)

• Compact mil spec stock kit designed for AR-15 rifles with adjustable configuration
• Includes extension tube buffer spring receiver end plate and castle nut
• Four position adjustable design with compact 4.28 inch overall stock length
• Constructed from high strength polymer with aluminum extension tube for durability
• Includes cheek rest and removable extended cheek rest insert for customization
• Rubberized butt pad improves recoil absorption and shoulder comfort during use

The Leapers, Inc. – UTG UTG PRO Ops Ready S4 Mil-Spec Stock Kit is a rifle stock kit designed for AR-15 platform stock installation and compact adjustment. This mil-spec stock kit provides a 4-position adjustable system for controlled length of pull.

The kit includes a mil-spec extension tube, buffer, buffer spring, receiver end plate, and castle nut for full assembly. It features impact resistant polymer construction with a black finish and a compact 4.28 inch stock length. The design incorporates a rubberized butt pad and integrated cheek rest system for consistent positioning. In standard configurations, the stock supports four adjustment positions for different shooting setups. This model fits AR-15 rifles and is used for compact stock installation in field carry and range use where reduced size is required.