My conclusions after hours of Online AR research

Would love one of those but it will be a ways down the line. Ammo is not cheap and neither is the gun. But they sure do look fun as shite.

I have a 300 blk out upper for my Smith and Wesson ar-15, and the suppressor is in the works. Didn't do the SBR on this one maybe later. I. Setup a trust with two friends and we bought three cans. If you are looking for a NFA trust lawyer let me know I'll forward you the contact info of the the guy I used.

Stingray, I don't own an AR15, but I've killed deer w/ a Thompson Center Contender using a 12" long 300/221 barrel; the 300/221 (actually developed by JD Jones as the "300 Whisper") was the precursor to the 300 BLK. For what you want to do, I think the 300 BLK is a reasonable choice. I'd encourage you to fully understand what you'll have from a ballistic standpoint. Many folks nowdays (don't put me in that category) think the 30-30 Winchester is useless as a big game hunting round. Factory 30-30 Win muzzle velocities w/ a 150 gr bullet run from 2200-2400 fps. Depending on barrel length, the supersonic 300 BLK velocities will run 200-400 fps less than the 30-30. My personal experience w/ the 300/221 on small whitetail deer at up to 200 yards has been favorable (my handloads get 2250 fps w/ the 125 gr Nosler Ballistic Tip bullet). W/ a 16" barrel, you'll have a decent hunting gun for inside 200 yards; w/ shorter barrels, you'll lose velocity AND hunting range. I've not hunted deer w/ 300/221 subsonic loads but I've read of a handgun hunter who has. IIRC, he was not as impressed w/ the subsonic load for deer hunting. This was from a man who kills >50 deer/year so I trust his experience greatly.

Even the supersonic loads have VERY mild recoil and are much more quiet than most hunting loads.

What about getting a 16" threaded barrel, shoot the gun as is and see how you like it? If you're not happy, you can always add the suppressor and/or go to a shorter barrel.

300 BLK Barrel, inches Bullet Wt., gr Velocity, fps
16 125 2215
12.5 125 2150
9 125 2030

Just tossing this in the ring...OP just so you know, it will be closer to a year from when you submit your paperwork to when you get your stamps. You need to figure out how you're going to fill your AR needs in the gap. From what I understand, with the NFA rule change bullshite going on right now, you want to submit your paperwork yesterday.

Highly illegal to deer hunt with that setup, but go ahead and kaboom some hogs with it.