The Aim Sports M4 Stock Lock Pin Steel Black is a compact, all-steel accessory engineered to convert adjustable M4-style buttstocks into a locked, fixed position without modifying or damaging existing components. Designed specifically for California featureless and similar compliant configurations, this pin offers a clean, low-profile solution that integrates seamlessly with USGI M4, B5, LMT SOPMOD, VLTOR, BCM, Blackhawk, and LWRC stocks.

Ideal for shooters who need to secure their AR-15/M4 stock at a chosen length, this lock pin helps maintain consistent cheek weld and overall handling while meeting restrictive configuration requirements. Its steel construction and black finish support long-term durability in range use, training, and general rifle ownership. Aim Sports’ attention to practical design and compatibility makes this stock lock pin a straightforward option for compliant builds and featureless conversions.

Key Features:

• Manufacturer: Aim Sports
• Model: M4 Stock Lock Pin Steel Black
• Material: Steel
• Color: Black
• Firearm Type: M4 / AR-15 Style Rifle
• Compatibility: USGI M4, B5, LMT SOPMOD, VLTOR, BCM, Blackhawk, LWRC Stocks
• Use Case: Featureless conversions and fixed-position stock configurations