BATTLEARMS AR15/M4 Takedown and Pivot Pin Detent – Precision Fit for Secure Pin Retention

The AR15/M4 Takedown and Pivot Pin Detent is a vital small part that plays a big role in the function of your rifle. This precision-machined detent retains the front and rear takedown pins securely in place, ensuring your upper and lower receivers stay properly aligned. Made to exact MIL-SPEC dimensions, it fits all standard AR15 and M4-style lowers and is ideal for both new builds and repair jobs.

Built from high-strength steel and finished for corrosion resistance, this detent delivers reliable performance in any condition—making it a must-have for builders, armorers, and anyone who wants to keep their rifle in top shape.

Key Features:

• MIL-SPEC compatible with AR15 and M4 platforms
• Precision-machined for perfect fit and reliable retention
• Durable steel construction for long service life
• Black oxide or phosphate finish for corrosion protection
• Ideal for new builds, repairs, and spare parts kits

Applications:

• Lower receiver assembly for AR15/M4 builds
• Replacement for damaged or lost detents
• Armorer kits and bench stock replenishment
• Routine maintenance and rifle servicing
• Compatible with most MIL-SPEC lower receivers

Reasons to Buy:

• Essential for receiver function – secures takedown and pivot pins
• High-quality material built to last under repeated use
• Perfect spare to keep on hand for quick fixes or builds
• Universal compatibility with most standard AR lowers
• Cost-effective upgrade or replacement part

Customer Reviews:

• ⭐⭐⭐⭐⭐ “This is one of those tiny parts that can ruin your day if you lose it. Works great, perfect fit.” — Ryan K.
• ⭐⭐⭐⭐⭐ “I always keep a couple of these in my parts box. Inexpensive insurance for every build.” — Jeff S.
• ⭐⭐⭐⭐⭐ “High quality and easy install. Exactly what I needed for my lower refresh.” — Brian M.