Not without the ATF SBR paperwork and tax stamp being done before you modify it

Tristen, to legally do so, you would need to pay a $200 Tax Stamp and register the firearm as an NFA "SBR" - Short Barreled Rifle. atf.gov/firearms/qa/which-firearms-are-regulated-under-nfa

Tristen, You can modify this firearm any way you like, but if you put a barrel shorter then 16" on this firearm you must pay $200 tax form and register this firearm as an SBR (short barrel rifle). It is a class III firearm and you have to fill out a form 4 and register it with the ATF per NFA rules. Without proper paperwork you could be a felon if caught.

Tristen, You can modify this firearm any way you like, but if you put a barrel shorter then 16" on this firearm you must pay $200 tax form and register this firearm as an SBR (short barrel rifle). It is a class III firearm and you have to fill out a form 4 and register it with the ATF per NFA rules. Without proper paperwork you could be a felon if caught.