MODIFY Accurate Metal Hop Up Chamber for M16/M4 Series
MODIFY Accurate Metal Hop Up Chamber voor M16/M4 Series
Upgraded hop up unit for most M16/M4 series. Improved pressure arm, and excelent adjustment!
* Full metal construction.
* Fits most M4/M16 series
* Improved accuracy.
* Stays fixed in requierd position.
* Two pressure arms, to fit different style hop-up nubs/fishbones