The JE Machine Tech PS-ST2B+PS-BTM Mil-Spec Stock Combo is a complete rear-end assembly for AR-15 and AR-10 rifles that use a standard carbine receiver extension. This matched set pairs the PS-ST2B 6-position collapsible M4-style buttstock with the PS-BTM buffer tube, giving builders and owners a straightforward way to upgrade or replace worn components while maintaining true Mil-Spec dimensions and familiar handling.

Designed around a high-strength, impact-resistant polymer stock and a 6061 aluminum buffer tube with a hard black anodized finish, this combo balances durability with manageable weight. The kit includes the collapsible stock, buffer tube, carbine buffer, action spring, castle nut, and end plate, making it well suited for new rifle builds, general range use, training, or refreshing a workhorse AR platform. JE Machine Tech’s attention to fit and function helps ensure reliable performance and consistent adjustment across all six positions.

Key Features:

• Manufacturer: JE Machine Tech
• Model: PS-ST2B+PS-BTM Mil-Spec Stock Combo
• Product Type: Mil-Spec stock and buffer tube combo
• Platform Fit: AR-15, AR-10
• Stock Style: 6-position collapsible M4-style buttstock
• Color: Black
• Stock Material: High-strength polymer
• Buffer Tube Material: 6061 aluminum
• Finish: Black anodized
• Approximate Product Weight: 1.24 lb
• Included Components: Stock, buffer tube, buffer, spring, castle nut, end plate