SiJun SJ M4 MK18 Magazine these buffer tubes are compatible

these buffer tubes are compatible with a variety of gel blaster models like the JM J8 J13

Can be folded with either large or small aperture in position

- It comes with the mounting grub screw and adjustment grub screw as well as the required hex key

-  The XYL ARP9 Magazine fits for xyl little moon arp9 gel ball blaster

These darts utilize improved glue and bonding technology for increased accuracy and durability

SiJun SJ M4 MK18 Magazine these buffer tubes are compatibleSJ M4 Original Magazine For sijun sj m4 cqb , sj hk416 and sj mk18 gel blaster gun. fit 7 8mm gel balls. Specifications: Brand: sijun. Color: black. Material: nylon. Color: black. capacity: 200 250pcs gel balls Package includes: 1* sijun m4 gel blaster mag.