only use regular PayPal to provide purchase protection
I have the Aimtec saddle mount, works well just not with my Eotech 512. If you are interseted in it let me know. I would not drill and tap a M1 Super 90 the receiver is to thin.
If its one of the original stamped HK, do some internet searches, you will find a lot of information on it.
Saw you pose the same question over on 24hcf. If Sumtoy says to D&T that’s all I would need to hear. As I said in my response on 24hcf I’ve personally had 2 M2s D&T’d without issue. I’d be surprised if the M1 receiver was thinner than an M2Don’t overthink this.