The PDI 04 Barrel Spacer, crafted from durable POM and featuring an inner O-ring to prevent slippage and maintain optimal positioning, is now available at the X-Fire online store. Specifically designed for the Tokyo Marui VSR-10 Pro-Sniper (excluding the G-SPEC model) with a 10mm outer diameter inner barrel, this spacer is compatible with both original and PDI inner barrels. Each purchase includes a set of two pieces.