Crimped primers will help prevent losing primers in your upper, but the problem remains -- your carbine-length gas system with a suppressor is choking itself.

Without gunsmithing I'd first try an XH buffer and an LMT enhanced carrier. You're going to spend some money.

If you want to keep your present overall system length (with the suppressor you already own) you might try a mid-length gas barrel (port pressure will be lower than with a carbine-length, but overall system pressure time until un-corking is the same). It'll help, but won't solve your pressure-time curve issue.

When you clean the bolt keep an eye open for flame cutting around the primer pocket radius on your bolt face:




I LIKE suppressed ARs, and I like the idea and concept behind them. The mechanics are a challenge, as the rifle-carbine were not originally designed for them.