RA-Tech reviews KSC M4A1

RA-Tech have a new test video and review for the KSC M4A1:

RA-TECH did the review for KSC M4A1,and as usual we did the test video for it,
please check it out below:

[youtube http://www.youtube.com/watch?v=S1mrNxj4Rz8&hl=en]

(RA-Tech)