New test video from RA-Tech: new WA M4 pistol base

RA-Tech have sent in a test video for the new WA M4 pistol base:

Dear Arnie, RA-TECH already done the improvement for the WA M4 pistol base of NPAS kit, the new design would help the O ring comes with pistol base to create "airbag effect" and for more details please check out the test video via youtube.

[youtube http://www.youtube.com/watch?v=mADLA7mikfY&hl=en]

(RA-Tech)