I recently got my SP5 to MP5SD conversion back from TSC. I didn’t have a drum sight when I sent it in so once I got it back I decided to take off the SP5 sight and zero the drum sight. Shooting at 25m I am not able to get any discernible group, it’s all over the place. I’m not expecting pinpoint accuracy but 8-10 inches at 25m is completely unacceptable. I have a TPM can on the gun. Any idea what could be causing this? I have a B&T can at work I’ll grab tomorrow and Try with it, however I’m still completely befuddled by the groups I’m getting. I’m not the best shot by any stretch but the same night I shot this I shot around a 2 inch group with an APC45. The picture is at 25 yards.
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