Our Price: $120.00
Colour Black  Green  Tan

Full metal CASV M4 by BOYI (BI 3581M) Black

Name:	M4 CASV metal body
Manufacturer:	DBoys China
Weight:	4.63kg with box
Power:	350fps with 0.2g BB
Metal Gear box:	Yes
Adjustable Hop up:	Yes
TM compatible Hop up:	Yes
Hi-Capacity Magazine:	Included 300rd
Battery and Charger:	Included 8.4V 1100mah

 It has a special barrel can be converted from standard m4 barrel 14" to 11.5" CQC version.

7MM bearing Gear box.

Systema style Hop-up set.

BI 3581 has a  handgard of CASV which can fix the rail on 5 side ( Bottom, left, right, lower lift like\, lower right like/) and 2 to 3 poistions along each side. The advantage of lower right rail makes  your thumb easier to reach the back button of hand hold version surefire-flash without the pressure switch.

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