Ill make this short: Ive had a standard P320 upper (no LCI). I bought an M17 slide (without a barrel), and when it showed up I realized that I cannot use my Sig P320 threaded barrel with the LCI installed because that barrel is not cut for an LCI. Can I simply remove the LCI and shoot it, and have no issues? Or do I now need to find a barrel that was cut for an LCI?
Yes you can. I installed a SilencerCo Threaded Barrel on my M17. Had to remove the LCI for it to fit. However, when shooting my M17 with the DPP optic installed, the open space where the LCI used to be keeps blowing debris onto the lens. More often than when the LCI where in place. Have to keep wiping down the lens after shooting every other magazine.