Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 9 - Jul 14
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 1165 reviews
Sort
Product Reviews
★★★★★ 5
short sleeve shirt
Color: Sapphire Blue, Size: Large
very comfortable, good quality and the size was good
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 25, 2026
★★★★★ 5
Fit perfect
Color: Soft Lavender, Size: X-Large
The fit was perfect. Love the colors. Quality of the shirt is very good especially for the price.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 31, 2026
★★★★★ 4
Travel shirts
Color: Blush Pink, Size: XX-Large
Their very well made and a good value but not even close to being was and wear.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 18, 2026
★★★★★ 5
cotton blend
Color: Blush Pink, Size: X-Large Tall
The item says it is 55% cotton and 45% polyester. In fact the shirt label says 100% cotton. Very satisfied with the shirt as it looks good, wears good, and a nice shirt overall
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 28, 2026
★★★★★ 5
Great fit
Color: Crisp White, Size: Small
Shirt is great. Nice fabric.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 22, 2026
recommand products
LOMAX G4030019 - LOMAX, Stance, Hard Tri-Fold Cover Black Diamond Mist Finish Single Rail
616.25
LOMAX G3050039 - LOMAX, Stance, Hard Tri-Fold Cover Black Urethane Finish Single Rail
608.17
LOMAX G3060019 - LOMAX, Stance, Hard Tri-Fold Cover Black Urethane Finish Single Rail
608.17
LOMAX B4030029 - LOMAX, Hard Tri-Fold Cover Black Diamond Mist Finish Split Rail
602.23
LOMAX B5040039 - LOMAX, Hard Tri-Fold Cover
1113.92