| verified buyer
For: Modify M4/M16 1-Piece Metal Hop UpProduct Information:
I have used this in my Classic Army M4 in about five or six games and I have to say I am thoroughly impressed with this unit's performance. The hop up stays dialed in and does not come lloosefrom the vibrations of the gun. Very high quality material and I don't think I will have to buy another unit for a very long time.
High quality metal
High quality gears
New technology from Modify
Very stable when set right
Can be a little tricky with some types of buckings. Not a huge problem though.