Timbercat-SD Stripped Upper Receiver

The Timbercat-SD Stripped Upper Receiver is a purpose-built, lightweight upper assembly engineered specifically for .22LR AR-platform builds utilizing CMMG-style standalone bolts and barrels. Designed for compact, suppressed configurations, this system delivers clean lines, optimized fitment, and practical functionality in a streamlined package.

Manufactured from high-strength ABS, the Timbercat-SD offers excellent weight reduction while maintaining structural rigidity for dedicated rimfire applications. Its integrated design supports ultra-compact builds centered around 4.5” barrels and accommodates suppressors up to 1.65” in diameter, making it ideal for tucked suppressor configurations.

Features

• Compatible with CMMG-style standalone .22LR bolts and barrels
• Optimized for 4.5” barrel length
• Suppressor-ready — supports diameters up to 1.65”
• Durable, lightweight ABS construction
• Streamlined handguard profile for compact builds
• Designed for dedicated rimfire AR-15 platforms

Included Components

• Timbercat-SD Upper Receiver (ABS)
• Barrel Nut
• Handguard
• Charging Handle Assembly

Note: Bolt and barrel are required for operation and are sold separately.