Our take: This NEW hop-up chamber unit (complete) by DBoys is perfect for the M4 / M16 series of AEG rifles. Constructed out of high quality polymer for maximum performance, this hop-up chamber is ready to use right out of the box and is a cost-effective alternative to other similar hop-up chamber units that can cost more than $25!
- Durable polymer build
- Ready to use out of the box
- Compatible with M4 and M16 series AEGs
Package includes: Hop-up chamber, spring