Yas' previously reviewed G&P LMT 7-Inch Tactical CQB AEG gets an upgrade with the Pro-Win M4  Chamber, a hop-up system which has a coaxial, drum-type hop-up dial which is said to be easier to adjust and easily identifiable with the blue colour. He recommends this hop-up chamber where you can easily put incremental changes to .20 to .25 gram BBs.

Read the full review at Hyperdouraku.