SRU AR Bullpup Kit for TM Spec M4 Airsoft AEG Rifles
(Color: Black)

"So before you buy this kit I want you all to be prepared. It is not fun to put together and can be very frustrating at times, and in my opinion could be designed better. First of the base gun HAS to be a standard TM spec M4A1 with a REAR WIRED BATTERY. Barrel length can vary, but it CANNOT be any M4 variant with a free float barrel. Then you have to remove half of the gun. Stock, buffer tube, carry handle, motor and grip, delta ring, hand guards, front sight and flash hider, and depending on the model you choose this can be a huge pain itself. Then you follow the link in the QR code provided In the box and follow the mediocre instructions. My kit appeared to be semi assembled and I didn’t have to follow all the steps, but yours may be different. The 3D Printed plastic is actually really solid so props to SRU there, but fit and finish between parts is a real let down with huge seams and gaps in some places. Hand fitting with a file or sand paper may be required for certain bits and pieces. Jerry rigging may be required as well. The tigger mechanism is brutal, I mean seriously 0/10. It creeks, moans, and gets stuck. Nerf guns have better triggers. The motor housing is also suspect and your motor may not fit. Mine didn’t so I had to use another. Battery compartment can only fit a small LIPO so make sure the base gun you choose is LIPO ready. When it’s put together it looks great IF you can ignore the huge seams. Do I think it’s worth it? Maybe. I mean all these M4’s are just a liiiiiiittle different here and there so one gun might fit better than another. I might honestly try it on another M4 to see. I’ll update if I do.