.450 Bushmaster Upper

Tromix.com

Bear creek has been having issues with their 450bm uppers. Maybe check out palmetto state.

Tromix would be who I would look to .

I used a Tromix bolt on my 458 Socom and it is nice.

Set on semi auto?? The Ruger American ranch is a nice light weight 450bm hunting rig right in your wheelhouse on price

Rock river arms makes a 450 B upper.. most of there stuff is pretty accurate.

I have a couple original 20” Bushmaster 450 uppers, and they shoot really really well.

I assembled a 450 upper with a 16” Faxon barrel, and with a Sig Romeo red dot and 3x Juliet magnifier, it’s a hell of a woods rifle.

Tromix. Got my 16 inch from them

I've been running a 20" factory Bushy ever since I won it from a Guns Magazine raffle over 10 years ago. I actually won a 16" 5.56 in ATACS camo but Bushmaster said they were out of stock for up to a year, so they offered me this instead. Good trade, as I was flush on the little bores anyway.

It's perfectly accurate, allowing me to stretch it out a bit. That said, once I added a can, it became a bit longer than my normal hunting rifles even. It's doable but I kind of wish I had a 16" barrel, just to help even it out some. Still, the performance is commendable. I just picked up a Ruger American with the 16" barrel for a knock around that'll get the can as well.

Here it is all put together


And here it is out putting bears in the meat grinder.

I run the 16" 16 twist Faxon 450 bushmaster AR , with 185 copper HP to 502 gr cast. Just resize .458 bullets in a cheap Lee sizing die to .452". The 16 twist works on heavy 502 gr subs or fast and cheap bulk .451" 45 ACP bullets, which stand up to the 2400 to 2600 fps instead of 900 fps out of the 45 ACP. With cheap pistol bullets it's a fun and fairly cheap pinker, with lots of power ...add a recoil pad and the fast light bullets can be fired in total comfort, and the heavy loaded 502 gr won't bruise your shoulder.

Tromix all the way.