The build for anyone who wants 300 Blackout without paperwork. At 16 inches the rifle is legal everywhere a standard rifle is, needs no tax stamp, and gives up nothing in accuracy. What it costs is length once a suppressor goes on the end.
| Component | Specification |
|---|---|
| Chambering | 300 AAC Blackout |
| Barrel | 16 inches, 1:8 twist |
| Platform | standard AR-15 rifle, no NFA process |
| Gas system | carbine or pistol length |
| Supersonic velocity | roughly 2,350 fps with 110gr |
| Muzzle energy | roughly 1,350 ft lbs |
| Practical range | 250 yards on deer sized game |
| Intended use | hunting, no stamp ownership, maximum velocity |
The velocity gain over a 9 inch build is real but modest, roughly 150 fps with supersonic loads and almost nothing with subsonics, which are capped below the sound barrier by design. If a suppressor is in your plans, weigh that gain against carrying an extra seven inches of barrel plus the can.
Where this build genuinely wins is supersonic hunting reach and paperwork simplicity. Compare the full barrel length figures in our barrel length guide, model your load in the ballistics calculator, and browse loads on the 300 Blackout ammo shelf.
