Timbercat-K Stripped Upper Receiver

The Timbercat-K Stripped Upper Receiver is a compact, MP5K-inspired .22LR upper engineered for dedicated rimfire AR-15 builds utilizing CMMG-style standalone bolts and barrels. Designed for maximum compactness and clean proportions, the Timbercat-K delivers a sleek, minimalist profile without sacrificing reliability.

Manufactured from high-strength ABS, this upper provides lightweight durability optimized specifically for rimfire applications. Its handguard terminates flush with the end of a 4.5” barrel, creating a tight, balanced footprint reminiscent of classic subcompact PDW designs.

Features

• Compatible with CMMG-style standalone .22LR bolts and barrels
• MP5K-inspired compact styling
• Optimized for 4.5” barrel length
• Lightweight, durable ABS construction
• Dedicated rimfire configuration
• Clean, flush-fit handguard profile

Included Components

• Timbercat-K Upper Receiver (ABS)
• Barrel Nut
• Handguard
• Angled Foregrip
• Charging Handle Assembly

Note: Barrel and bolt assembly are required for operation and are sold separately.