So I plan on putting together a 5.56 SBR with the BCM 11.5" upper and a multi cal lower. Other than the lower and a few other spare parts, I don't have any other components and will be purchased over time.

My question is this. I want to start the ball rolling on the Form 1 and buy the rest of the components later, but I don't know what OAL length I will need to put on the Form 1. The probably is complicated a littler further as I plan to use a Maxim PDW stock on the build.

Should I submit my Form 1 with a OAL appropriate to a 11.5" barrel and 6 position stock, or submit everything with the length appropriate for the Maxim stock?

Any help would be greatly appreciated.

exactly what i did for my 3 sbrs..

Thanks guys that is exactly what I needed to know. Now off to spend more money.

I have a maxim stock on my 9mm. I could put my 10.5" 5.56 upper on it and get you a good length. Shoot me a PM if you want me to mock it up for you.

I mounted my 10.5" on the lower with the maxim PDW stock. With a A2 flash hider it's 29 1/4".

No muzzle device

That is correct. He can figure out the length without the flash hider. I didn't have a crushwaher to replace the one on it. So I measured with it on.

Thanks for the help everyone. I am going to get everything measured up this weekend hopefully and can go from there.