Unicorn Airsoft SIG Sauer P320 M17 / M18 Hop Up Chamber (Chamber Only)

Price: $30.60 – $36.99 — In stock at 2 retailers.

Prices last checked August 20, 2026 across 5 retailers.

The Unicorn Airsoft SIG Sauer P320 M17 / M18 Hop Up Chamber is a high-performance "TDC" (Top Dead Center) upgrade designed specifically for the VFC SIG Air P320 series. While the stock hop-up system uses a traditional dial that can shift under recoil, this Unicorn Airsoft chamber utilizes a precision screw-down method. This ensures that once your hop-up is set, it stays locked in place, providing the shot-to-shot consistency required for competitive play and long-range accuracy. Key Performance Features TDC-Style Adjustment System: The "Top Dead Center" design applies pressure directly to the top of the hop-up bucking. This eliminates the lateral "side-play" found in traditional lever-based systems, resulting in a perfectly centered hop-up effect and straighter BB flight paths. Stainless-Steel Adjustment Screw: Features a heavy-duty stainless steel screw for fine-tuning. Unlike plastic dials, this screw offers granular control, allowing you to lift heavier BB weights (0.30g+) with extreme precision. Durable Zinc Alloy Construction: The chamber body is cast from high-strength zinc alloy, providing a rigid and stable housing for your inner barrel and bucking. This rigidity prevents "barrel wobble," which is a common cause of accuracy issues in GBB pistols. Direct-Pressure Mechanics: The adjustment screw acts directly upon the bucking/tensioner. This simplified mechanical path means there are fewer moving parts to wear out or shift during the violent blowback cycle of Green Gas or CO2. Outer Barrel Fixed Pin Included: To ensure the most stable platform possible, this kit comes with a dedicated fixed pin. This locks the hop-up chamber securely into the outer barrel assembly, minimizing movement during the slide’s travel. "Drop-In" Installation: Designed as a 1:1 replacement for the factory VFC chamber. It requires no permanent modification to your pistol and is compatible with both the M17 (Full Size) and M18 (Carry) models. Technical Specifications Feature Specificatio

Unicorn Airsoft SIG Sauer P320 M17 / M18 Hop Up Chamber (Chamber Only) price comparison: the lowest price is $30.60 at Boomarms, the highest is $36.99, and the median across 5 tracked listings is $33.25. Comparing retailers can save up to 17% ($6.39) versus the highest-priced listing.

Compatible with: P320

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