Qd swivel not machined correctly - CAA Micro Roni Stabilizer Pistol Carbine Conversion for Glock - Non NFA

The QD swivel attachment to the Roni is not compatible with off the shelf QD swivels. The groves that the ball bearing fit into are a little to deep for the bearing to seat properly. You will notice that there is a plastic covering on top of the socket. While this is part of the problem, removing this is not enough. I took a file a carefully removed plastic and metal until the QD attachment engaged the socket. Important to file and test repeatedly so that you don't go too deep. Once the attachment starts to seat, you are getting close. A little bit more filing should do the trick. Once it seats well, you should attempt to twist the QD attachment. In my case, the attachment could not be pulled out but it could be twisted out. A little bit more filing will fix the twisting problem and the QD attachment should be solidly in place.

Clearly this is a design problem and the company should address this and reimburse previous customers for their oversight.

Other than this issue, this is a fantastic accessory to my Glock 17.