RA TECH KSC M4A1 review and magazine and bolt compare

We not only introduce KSC m4 feature, also compare the weight of bolt and magazine. and point out the different design valve lock. Some of parts in KSC m4 trigger set are stronger and thicker. Because it’s JAPAN version, so the nozzle diameter is smaller. RA TECH is trying to custom it! We are trying to insert the NPAS and super recoil buffer. 此影片中簡介KSC M4 的特色。並與其他品牌的槍機與彈夾比較差異。並指出切氣閥的位置。 板機組的擊鎚與司牙都已加厚強化。 日本版的槍機出氣嘴部分內部加上了黃銅零件縮減內徑&#