Yes, there are ambi selectors. As a pure righty, I find them enormously helpful, so it's not a vast leap to think that it'd be so for a lefty.
Grey Search button, keyword "dominant," (i.e., "cross-dominant"), limited to thread-titles only and to the Training and Tactics subforum:
https://www.m4carbine.net/search.php?searchid=5088604
The threads are older, but the last one is pertinent to a lot of the manipulation aspects. I know hal_555, in particular, made the switch to going all-around lefty his "labor of love," and he's met with success doing that. One possibility among many...
Orange Search button, keywords "cross-dominant" :
https://www.m4carbine.net/gtsearch.p...102j1003328j14
A lot of the above info revolves around actual use of one's "Other Strong Eye," but you have a lot of folks you can reach out to in terms of firearm manipulations. Most of them will encourage you to seek competent professional training (presuming you've not done so...?), as it's the best place to seek out and try techniques other than what you already do.
Larry Vickers, for instance, shoots carbine lefty, pistol righty, provides instruction....but he's not the only one. Training and practice generally cures awkwardness; there's no such thing as "muscle memory," but anything is awkward until one builds the correct neural pathways. LAV, unless I'm completely off, teaches lefties to simply use the stock safety by applying the trigger finger to it in the same motion as putting the booger-hook on the bang-switch.
Other suggestions:
CH - Maintain your left hand on the fire-control group, keep the butt on your shoulder/chest, rotate gun clockwise, come over the top with your right hand, do an Austin Powers judo-chop or similar to the CH, pull back to do what you need to do. I don't mean actually CHOP, just envision the heel/knife-edge of your hand being what contacts the arm of the CH so you can pull it back....
Immediate Action, for example, might go like so: push/pull magazine with right hand --> rotate & judo-chop to rack the CH --> replace right hand to forearm of weapon/re-acquire target or seek new target/attempt to fire.
Reloads - yeah, right hand reloads, but a couple of options besides rotating....
1) Use your trigger finger to hit the release; it should be out of the guard, anyway, as part of the reload.... See what this cat does @ the 15sec mark:
http://www.youtube.com/watch?v=-WdCKTLCnEc
2) You know how folks do a magwell grip when firing...? Go that way, using your right hand to go around the front of the magwell to reach the release.
Both methods work, whether you're cross-dominant, or just a righty that's shooting lefty for whatever reason.
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