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AIRSOFTCON 2026 - October 17, 2026

KWA RM4 ERG Rotary Hopup Assembly

ID: 72937 (HU-199-1601-0352S)
199-1601-0352S
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KWA
1 Customer Review(Write a review)

$30.00

Airsoft Authority Since 2001
Serving enthusiasts for over 25 years
Industry-Leading Warranty
Buy with confidence - 90 day warranty
Ships Fast from US Warehouses
Free shipping over $149 in lower 48 states
MAP ProtectedExempt From Coupons
The manufacturer of this product enforces a strict minimum advertised price (MAP) policy which excludes this product from any additional discount coupon codes. This item, however, may qualify for free shipping.
Order Today Receive as soon as Mon Aug. 24

Product Description

Features

  • High quality reinforced polymer construction
  • Rotary style adjustment knob
  • Factory direct OEM replacement part
New to the KWA ProShop is the RM4 ERG rotary hop-up assembly, which comes with all parts pictured. This will fit the new RM4 Series as well as the original PTS ERG line.

Compatibility: For KWA RM4 ERG and other compatible M4 / M16 Series Airsoft AEG Rifles
Material: Polymer

Manufacturer: KWA

1 Customer Review

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Evike Outpost Ontario

Evike Outpost Ontario

319 West Holt Ave., Ontario, CA 91762

(909) 395-0056

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KWA

About KWA

Established in 1988, KWA has been the leadingdesigner and manufacturer of airsoft replica weapons for law enforcement and military training. Its reputation for quality, performance, and reliability makes KWA a recognized leader in professional airsoft products.In a time when airsoft development is focused on external replications and logos, KWA has been advancing airsoft technologies with the introduction of the NS2 Gas Blowback System and the 2GX Mechbox. Both product advancements increase the overall performance and reliability beyond all conventional standards of the industry. These products represent KWAs commitment to excellence and passion for engineering products that simply outperform.KWAs state-of-the-art manufacturing facility is located in Taiwan with an independent sales and distribution operation in the United States that services the Americas and all European Regions.