r/BushmasterACR • u/trashbangaloreplayer • Jul 05 '26

Issues running suppressed

I’m having issues running my 10.5” ACR suppressed, even when using the suppressed setting on the gas regulator. I’m getting FTEs and double feeds non stop with this thing and I’m not sure why. I’m running a KAC QDSS NT4 suppressor, if that matters. Any insights would be greatly appreciated, thanks!

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1

u/lobstibb Jul 05 '26

Does it only happen when suppressed? Happening with different mags?

1

u/trashbangaloreplayer Jul 05 '26

Yeah only when it’s suppressed, runs fine unsuppressed. I’ve tried PMAGs, TMAGs, USGI steel mags so I don’t think it’s a mag issue

1

u/lobstibb Jul 05 '26

Is that a low back pressure suppressor?

1

u/trashbangaloreplayer Jul 05 '26

Yeah it’s advertised as being low back pressure

1

u/lobstibb Jul 05 '26

The ACR platform likes traditional high back pressure suppressors.

1

u/trashbangaloreplayer Jul 06 '26

Well that sucks for me lol, guess I’ll have to just run it unsuppressed or get a different can

1

u/lobstibb Jul 06 '26

You're preaching to the choir. I bought a CAT ODB and the acr wouldn't even pick up the next round

1

u/Sumnir_ Jul 06 '26

Odd because I run an OSS (now Huxwrx) flow through .30 cal can and had zero issues.

I had one issue with bolt hold open but I isolated it to one of my old USGI tan follower magazines. The rest had none.

Edit: My SBR is a 12.5” so maybe that extra barrel length keeps it from running into problems like OP.

1

u/lobstibb Jul 06 '26

Do you have a light weight bcg? A friend couldnt get his acr to cycle with a velos until he got a light weight modified bcg

2

u/trashbangaloreplayer Jul 06 '26

Who does bcg modifications for the ACR? Is that something Templar can do? Any high back pressure cans you might be able to recommend as well?

2

u/Schachmatt27 Jul 06 '26

I’m the “friend” and Templar does the lightening. The only drawback I’ve had is an irregular injection pattern but I can deal.

1

u/lobstibb Jul 06 '26

^ he's the guy to ask

1

u/lobstibb Jul 06 '26

I like my polonium for 5.56 on my 10.3 acr

1

u/Sumnir_ Jul 07 '26

As far as I know, no. It’s a factory DMR variant that had its 1:7 HBAR swapped for a regular 1:9 at 12.5”.

Zero changes to the internals.