TacFire BU-556-5 is a complete AR-Platform upper assembly built around a 5.56mm NATO 5-inch black nitride barrel. It’s paired with a black anodized receiver and an M-LOK handguard for straightforward mounting of accessories while keeping the system compact for fast handling.

Key features

• Complete upper assembly format for a straightforward upgrade path
• Black anodized receiver for abrasion resistance and a consistent appearance
• M-LOK handguard with modern accessory mounting options
• 5-inch black nitride barrel for durable, corrosion-resistant performance
• 5.56mm NATO chambering for reliable AR-Platform compatibility

Upgrade your AR build with the TacFire BU-556-5 complete upper assembly for a compact 5-inch 5.56mm NATO configuration with durable finishes and an M-LOK handguard.