Look at PSA. They often have specials.
You and me both...Prices have dropped big time on AR 5.56 and somewhat on 300 BLK but the .458 SOCOM still remains high. Must be supply and demand.If I could find a .450 Bushmaster or .458 SOCOM upper for under $300, I'd be REAL tempted. I really ain't gaining much with a .300 BLK over my SKS for hog busting, but a .45 caliber would whack 'em and stack 'em ...:rofl:
Here are a couple of very good quality .300BLK uppers from PSA. Only difference I can see is the handguards and free shipping on one. One is $239 plus shipping and the other is $249 with free shipping. Use the BCG and charging handle from your 5.56mm upper.
If I had either one I would immediately swap out the gas block for an adjustable gas block. My 16" .300BLK has carbine gas length and I only shoot supers through it, but I still have the gas turned down some with an adjustable block. The Pistol length will give you the ability to shoot both supers and subs, but that short gas length makes it pretty harsh with hot super loads. Non-Suppressed Subs will be all the way open and probably still struggle to get enough gas to cycle with any sub load under 205 grains.
BTE has a very good adjustable low profile gas block for $35 delivered, https://www.bte-usa.com/bte-set-screw-micro-gas-blocks
BTW, do not get an adjustable gas block that adjusts from the front, once you get a suppressor you will have to remove the suppressor to adjust the gas block and you will need to adjust the gas block with a suppressor.
You can reload 300BLK for less than .223 if you shoot Hi-Tek lead bullets.
I built both of my 300BLK uppers using Anderson and Bear Creek uppers and two different barrel brands, but both are pistols. I do not see the need for a 16" barrel, especially seeing as how a pistol length gas system may be needed for reliable cycling - depending on what you plan to shoot with it. If you're looking at velocity, then the gains just really aren't there as they are with true rifle cartridges, as (many have already said) the 300BLK was designed around a shorter barrel and geared to suppression first and foremost.
Both PSA (Palmetto State Armory) and Primary Arms have decent uppers - the PSA uppers are built "in house" and PA just resells but I've heard only good things about the Ghost brand (Radical is somewhat hit or miss...) and all of these run pistol length gas systems.
Why do you want the long barrel? What is your goal with this gun? What do you intend to shoot (load-wise)? Do you intend to suppress? To you plan on reloading for it?
If you just like the look of a 16" 300BLK, then by all means, pick one of the PSA or PA articles mentioned above and either run your existing BCG and CH, or purchase them along side. Can't really go wrong.
I ain't jumping the hoops to get a short barrel OR a silencer, personally.
EXCELLENT! Thanks! I book marked it. They also show 7.62x39 uppers, but folks have told me they don't work well with a .223 lower and straight mags.Bear Creek Arsenal makes complete uppers with BCG/CH in 450 for around $350
I have a 7.62X39 upper on a standard 556 lower. I had to buy an actual 7.62 mag designed for the AR platform to get reliable feeding.EXCELLENT! Thanks! I book marked it. They also show 7.62x39 uppers, but folks have told me they don't work well with a .223 lower and straight mags.