UPDATE OCTOBER 2018 Here are two last versions of Boltex kit. Evolutionally i've came to solution that 2 pins fixation of battery box is the best. But for your pleasure there are -1 version with battery box locked with sliding rail. Internals of the body (handguard normally) reworked for easier printing Hex nuts replaced with square nuts where possible. Conversion kit for M4/M16 airsoft rifle. The compartment is 119x42x19 mm Tested on CYMA. Designed for 37.5 mm barrel holder ring. Handguard is fixated with 3 screws. Battery compartment can be replaced with rail. Uploaded as multipart model. So you'll need some M3 screws and nuts. Assembly instructions upon request.
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