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Hi all. I ordered a basic and have been reading up on the ACR on these forums. I haven't received my ACR yet and have been reading some things about the H/L regulator. Are those on the basic or just the enhanced?
 

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It is not standard equipment that I am aware of. All ACR's I have seen or heard of come with the U/S regulator. I believe the H/L regulator is available to address the issue with some rifles not cycling correctly with high pressure ammo.
 

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Yup, I asked Bushmaster about that while I was checking on a Back Order. The U/S is standard and the H/L will ONLY be sent out if the user is having reliability issues with their system.
You'd think they'd just produce a 3 setting gas regulator. It'd be a lot cheaper in the long run.
 

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actually ive seen a picture with newer ACRs with the US regulator looking just like my HL reg. my take on it is they messed up the reg from the beginning (to shoot .223 not 5.56) since for some odd reason they had to change magpuls work and realized more people are shooting higher pressure ammo. i had to get the HL reg and now it works just fine. then i put in the US reg in and it starts tom jam up again. but it only jams with my 5.56 not .223. its fixed and they over nighted the new reg to me. ill eventually get another acr. im just waiting for parts to become available for it an hoping to od green!!
 

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So, interesting follow up to this 5+ years later...

I recently contacted Bushy for help with a Windham ACR stove-piping M193 ammo. I'd read on here that the H/L regulator was developed and used to fix this exact issue. I started by calling the parts department and ordering one -- no surprise: the parts guy didn't even know about them. I figured it was a "service department only" secret kinda thing and asked to be transferred. Turns out part and service are the same thing - he was also the guy that would get and fix my rifle if I sent it in. So we chatted for a while. There's only one guy that's been there longer than him, so he asked his senior. He hadn't heard of it either. So I directed him to the forums (the primary thread on the issue, which I can't seem to find now), which he read, and he'd never even heard of such a thing. After more discussion he gave a last ditch effort by putting me on hold and talking to the military division...

A short while later, he had the answer: they exist after all but are military-only, no exceptions. Absolutely no way to get one, even if you sent in a rifle that needed it. His official recommendation to fix the rifle in question is to avoid m193 ammo, which isn't the best answer but it's fair.

Just thought I'd pass that along.
 

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That's true, I can't even get those regulators and I've ordered military parts. They don't exist anymore, most likely they are completely discontinued.

I used to be able to run 193 really well but out of nowhere, my rifle stopped. I have like 900 rounds left of ammo that won't run for crap in my primary rifle. I can't even tune my Acr for that ammo, it still runs like crap.
 

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My regulator is gone it was shot without being rotated into a proper position. does anyone have any idea where I can get a replacement?
 

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Well you can either try to order one from Bushmaster directly, I believe the part number is F1009209. A better option, in my opinion, is getting in contact with Bigdog2003. He is a Bushmaster distributor and should be able to get you the parts you need. In fact I think someone over on the facebook group did the same thing a few months ago.
 

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I guess a lot of people do it apparently. I’m placing an order for a bunch more soon. As long as they didn’t change their dealer pricing, I’m about 20 or so cheaper for a replacement.
 
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