Home Forums Hunting & Shooting AR and Tactical Rifles Subsonic loads ......

Will subsonics function in a standard AR15?

Heavier bullets best in subsonics?

They may not cycle the action without opening up the gas port. A suppressor may give it enough back pressure to run.

I would be using a suppressor.

My buddies AR in 223 with the Supressor will not function with the sub-sonic loads. It becomes a single shot.
I do know that the 300 Blackout AR's will function with sub-sonic loads and a Supressor, though.

becomes a single shot, hand operated affair.

I used Hodgdon data for 55gr bullets don't recall what it was but used TrailBoss.

Mike

After market spring (weaker) available?

Remove a few coils from a stock spring?

Shorten the gas tube and relocate the gas block?

I never looked into it so am not aware.

Mike

Hoping for input from someone who attempted to make it work.

Mods tried that were not successful would be useful info.

What gas system does your gun have? Carbine, mid,or rifle.

I have all.

I would think the carbine (or even SBR) would be the best choice.

No, subs will not cycle an AR in .223. You can get an AR with standard parts to choke on light factory loads, to cycle subs would require a dedicated upper with an enlarged gas port, light buffer, light weight BCG, or a combination of those. Even if you could make it work, it wouldn't work with standard loads. If you want to shoot subs, the 300BO is the answer. Although, even then you still don't have a quiet gun.

The ballistic sense of a subsonic 223 is beyond my understanding.

I completely forgot about it but yes, there is a kit that will let you shoot subsonic loads from a AR-15 in .223. Ammo is cheap too.


http://www.brownells.com/rifle-part...-15-22-lr-conversion-kits-prod54549.aspx

Think 22 LR to 22 Win Mag Equivalents...with heavier bullets..

there are applications...

I have a Ruger American set up to shoot 60 grain Hornady Soft Points at an MV of 1600 fps for home defense... if someone breaks into the house...

using 6 grains of Unique...

the idea is if I have to use it, it won't be going thru walls and potentially hurting another family member...but has enough ooomph to get the job done I may need it to do...

Buy a 22 conversion kit, and choose your poison.
Same effect with just a lighter bullet.

Another reason is so that first shot is near 'Hollywood' quiet when predator calling, with a suppressor.

The cycling of the action will be loud as well. I've never heard a can that was Hollywood quiet with an AR.

I don't even get a 10.5 inch AR shooting regular loads with a can. The bullet won't upset past 25 yards or so. A suppressor on a 22 LR makes more sense.

I don't get shooting predators with subsonic loads.

I think most people need to shoot more and type less.

Subsonic loads in the .223 are a pain in the dick even with a bolt gun. I'd not bother attempting them with an AR.

Blackout would be a better option in my opinion.



Travis