I have a 300 blackout at pistol with a sb3a brace. If I remove my muzzle break and fully extend my brace I’m just over 26 inches. Can I put a vertical foregrip on this gun without doing paperwork ? What was the answer to your question? Do you have to measure from end of ext tube?
View attachment 524400 View attachment 524402
Or buy an existing AOW ($5 stamp)Should you go ahead with a papered project, note the cost to Form 1 an AOW is the same as an SBR (two c-notes). Ditto the paperwork requirements. Why not just paper it as the latter and call it good? After it is an SBR, you can pretty my do whatever the heck you want with it with respect to fore-grips, stocks, barrel/overall lengths, and the rest. Good luck with your work.