KWA RM4 ERG Rotary Hopup Assembly
Price: $30.00 – $34.99 — In stock at 1 retailer.
Prices last checked July 30, 2026 across 2 retailers.
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
KWA RM4 ERG Rotary Hopup Assembly price comparison: the lowest price is $30.00 at Evike, the highest is $34.99, and the median across 2 tracked listings is $32.50. Comparing retailers can save up to 14% ($4.99) versus the highest-priced listing.
Compatible with: M4/AR, AEG
Which hop-up unit fits AEG? Compare fitment & prices →
Where to buy the KWA RM4 ERG Rotary Hopup Assembly: prices at 2 retailers
- Evike: $30.00 — In Stock
- Simple Airsoft: $34.99 — Out of Stock
Frequently asked questions about the KWA RM4 ERG Rotary Hopup Assembly
- How much does the KWA RM4 ERG Rotary Hopup Assembly cost?
- The KWA RM4 ERG Rotary Hopup Assembly ranges from $30.00 to $34.99 across 2 retailers. The lowest current price is at Evike. Prices are updated regularly from each store's live catalog.
- Where can I buy the KWA RM4 ERG Rotary Hopup Assembly?
- The KWA RM4 ERG Rotary Hopup Assembly is currently in stock at 1 retailer including Evike. We track availability across 2 airsoft stores and update stock status regularly.
- What is the KWA RM4 ERG Rotary Hopup Assembly compatible with?
- M4/AR, AEG
- Is the KWA RM4 ERG Rotary Hopup Assembly a good aeg hop-up units upgrade?
- The KWA RM4 ERG Rotary Hopup Assembly by KWA is listed in our AEG Hop-Up Units category and is priced from $30.00. We aggregate prices from 2 retailers so you can compare and find the best deal. Check the price comparison table above for current pricing from each store.
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