I tried to look though other threads on this topic and didn’t find an answer.
I’m looking for a pair of electronic ear muffs, preferably with Bluetooth, that don’t interfere with shouldering a rifle. I have a pair of Walker razors and I still bump them enough to let noise in and that’s just not much fun when shooting 5.56 especially. Any recommendations on ear muffs specifically?
Look on Amazon, lots of options. 
I have the Walker silencer 2.0. they have Bluetooth and work better than the Razor imo
Do you have those Nathan? I had read that the dB reduction wasnt very good. That cutout at the bottom is prett minimalist and seems like it would stay out of the way.
I do.
The dB reduction isn’t very good. NRR is 18.
That’s the tradeoff you necessarily take when going with small and thin earmuffs.
Double up over plugs for indoors or rifles
I’ve got AXIL electronic earplugs (GS Extreme). They work pretty good once you figure out the right size foam piece and getting them inserted properly. Although I have had a few instances of kinda reshaping my inner ear when shouldering a shotgun, allowing some of the sound to get past the foam. If I was target shooting with a rifle, they’d work great. But if you’re repeatedly shouldering and shooting, you’d probably want their custom molded option. I just use the foam that you smash down and it expands inside your ear.
I will say that they are great for extended time at the range. I also have Howard Leight Impact muffs and the pressure from the muffs on the sides of the glasses was giving me a headache if I was training for a couple hours or more. And they happen to be 50% off right now.
I’ve been running Walkers Silencer 2.0 with Bluetooth for 3 months now and I’m in love with these things. Rechargeable and I just keep them plugged in the Jeep so they are always ready. Does not get any more low profile than these and paired with my iPhone and listening to AC-DC while I run-n-gun is a big plus 
BTW they are on sale at Midway for $149. Great deal!
May I suggest Chopin as a music alternative while shooting? 
The foam parts look similar to what comes with AXIL. Have you tried them with long guns? I haven’t had issues when I’m doing precision/target rifle (i.e. slower pace, get a good cheek weld, breath, shoot). Or if I’ve already shouldered my shotgun before the clay is thrown. But when doing a more rapid, “Pull!”, then shoulder & shoot, I’d occasionally get some leakage while I was getting that cheek weld. I’ve switched back to muffs when I’m doing more rapid shoulder & shoot with long guns. But I love them for everything else, especially during summer or when I’m at the range for a longer duration of time.
How well do these work in an indoor range? Do they have suitable noise reduction?
Side note: I’m not a fan of the lack of situation awareness that seems unavoidable if one listens to music while handling/shooting a firearm around other people handling/shooting firearms (and possibly issuing range commands or ceasefires)
When I’m in run-n-gun mode I have the range to myself. Otherwise I’m either teaching or shooting with others so no music.
I was just training someone in an indoor range with two ARs and a shotgun being discharged by me. Not ideal but I was fine. Normal indoor shooting, no issues.
Chopin is good for precision work. I need Thundestruck for John Wick speeds .
Once I found the right size foam for my ear canal I’ve had no issues with leakage. They are glued to my ear canals. Yesterday I had them on while playing with a full auto MP5 and while an M60 was being shot full auto next to me. All good 
I don’t normally play music when I wear mine. But when I first got 'em, I had to try it out. I was surprised by the clarity of also hearing everything around me. I didn’t have the music cranked up to 11. But it was just like having music in the background while still being able to have a conversation with someone, without yelling, and also hearing the sound of brass hitting the ground. If you’re listening to the music at a reasonable volume, there’s no issue whatsoever with hearing range commands and everything else that’s going on around you.
