![SIG Sauer M400 Tread 5.56 NATO AR-15 Semi Auto Pistol 11.5" Barrel 30 Rounds M-LOK Free-Float Handguard - Duke's Sport Shop, Inc. SIG Sauer M400 Tread 5.56 NATO AR-15 Semi Auto Pistol 11.5" Barrel 30 Rounds M-LOK Free-Float Handguard - Duke's Sport Shop, Inc.](https://dukessportshop.com/wp-content/uploads/2020/06/20200930_110505-1.jpg)
SIG Sauer M400 Tread 5.56 NATO AR-15 Semi Auto Pistol 11.5" Barrel 30 Rounds M-LOK Free-Float Handguard - Duke's Sport Shop, Inc.
I built an AR Pistol with a 11.5 barrel, my understanding if it's total length is 26' or longer I can use it like a rifle and ATF does not consider it
GlockGuy226 - What's Your Favorite AR15 Pistol Barrel Length? 🤔 This Is An 11.5" Barrel On A Build I Did A Few Years Back! ☠ I personally Like 11.5" Or 10.5" Barrels
![PSA 11.5" 5.56 NATO 1/7 Nitride 10.5" Lightweight M-Lok MOE EPT SBA3 Pistol Kit | Palmetto State Armory PSA 11.5" 5.56 NATO 1/7 Nitride 10.5" Lightweight M-Lok MOE EPT SBA3 Pistol Kit | Palmetto State Armory](https://wac.edgecastcdn.net/001A39/prod/media/fn7upu9h3FoXXgPsite/3FE9E211F4F02D9C2CE5B0DCD7F9C33D.app1_1574355091573_PZ320.jpeg)