Pay in installments of $8.74 with
,
and
Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 19 - Jul 24
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
Prowin Hop-Up Chamber for M4The ProWin M4 M16 CNC hop up chamber is a major upgrade over the stock plastic or weak cast metal hop up chamber in your AEG. Metal hop up chambers are known for providing a better air seal against the AEG gearbox and feeding much more smoothly than plastic chambers. However, many cast metal hop up chambers have weak points in the metal due to the casting process, but this issue is completely eliminated with the ProWin chamber. This hop up chamber is
The ProWin M4 / M16 CNC hop-up chamber is a major upgrade over the stock plastic or weak cast metal hop-up chamber in your AEG. Metal hop-up chambers are known for providing a better air seal against the AEG gearbox and feeding much more smoothly than plastic chambers. However, many cast metal hop-up chambers have weak points in the metal due to the casting process, but this issue is completely eliminated with the ProWin chamber. This hop-up chamber is fully CNC machined from aircraft-grade aluminum, meaning it is lightweight and durable, and the bright blue color gives your AEG a custom look.
Specifications:
Manufacturer: ProWin
Model: CNC Hop-Up Chamber M4 / M16
Color: Blue
Size: Fits Marui-style M4/M16 AEG
Package includes: one (1) hop-up chamber and parts
Features:
CNC construction
Improved air seal
Lightweight and durable
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.5 ★★★★★
Based on 19 reviews
Sort
Product Reviews
★★★★★ 1
Not what was expected
Color: Black, Size: X-Large
The shirt did not match the image on the website. While it is a button-down collar, the buttons are concealed, rather than exposed, and the material is polyester or nylon, giving the shirt a plastic sheen, which I do not like. The image on the website showed exposed buttons, and with tremors in my hands, exposed buttons are hard enough to secure.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 16, 2026
★★★★★ 5
Tela buena calidad
Good
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 22, 2026
★★★★★ 4
Sizeneed 3x
Color: White, Size: XX-Large
I’m to big so it’s to small need 3x
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 12, 2026
★★★★★ 5
Better that expected
Love the fit and fabric. Much better that I expected. I will be ordering more.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 4, 2026
★★★★★ 5
Fiel a la talla! Luce fantástica
Fuel à la talla. Lava muy bien en la lavadora y secadora. Luce hermosa.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 23, 2026