Help me critique this build

[Labayu]

I have a 10.5 LMT on my SBR and it is pretty friggin accurate for a non-floated barrel with a fixed FSB. I can only imagine that it would shoot right at or even under an inch if it was floated.

[HardToHandle]

Chopping a FSB is easier than cutting/rethreading. I would get an LMT 10.5", and chop the FSB, slide the KMR9 on and call it a day.

Pretty much what I have. The LMT 10.5 is no drama, boringly reliable and accurate.
The OP has a concept to optimize performance. A slight adjustment in specs will likely produce as reliable and less costly solution.

[MistWolf]

The diameter of a pencil barrel is too small to be re-threaded for a muzzle device, after being cut down.

The 11.5 does have enough of a velocity advantage over the 10.5 to be worth the extra inch of length.

I've been shooting my 10.5 inch shorty with the MagPul Slimline handguard. After shooting mine, I'm convinced the short barrel is stiff enough that a free float tube won't improve accuracy much




I'm planning to get a direct mount suppressor for it

[Skyfire1201]

Thanks all! I decided to get a Colt 6933 upper for a reliable (and inexpensive) factory setup. Maybe I'll build a 10.3" later on, but for now the 6933 will do.

[firefighter37]

Thanks all! I decided to get a Colt 6933 upper for a reliable (and inexpensive) factory setup. Maybe I'll build a 10.3" later on, but for now the 6933 will do.

That is a great choice

[SW CQB 45]

I had some stuff laying around and decided to build a 10.5 pistol using mainly AP parts.

I did take IG advice and ordered a Sionics BCG. I am in no hurry.

about $750, 26.25" long. No optics yet. going to play with it with irons first.

Blemished upper, 10.5 AP barrel, few BCM parts to include H2 buffer and pistol tube. I have an H3 just in case.