I was looking into a Core15 16" BO barrel.
They have a disclaimer that reads something
like this: you will need a piston set up to
make this barrel run properly!
So who has a 16" BO barrel and does NOT
run a piston system in it? And is it reliable?
And I misreading their ads?
I want to buy one, but not if the only way
it will run properly is with a piston- Why because
it's just that much more money spent!
Thanks
Piston or no Piston?
Moderators: gds, bakerjw, renegade
Re: Piston or no Piston?
No manufacture has gotten a piston to run better than DI in a 300BLK. The 300BLK runs more reliable with DI than with a piston.
Re: Piston or no Piston?
PSA 10.5" & 16'' FN CHF CL 300 AAC Blackout
Re: Piston or no Piston?
Actually the quote for the 16" 4150 barrel says to use an adjustable gas block since there gas ports are optimized to run subsonic suppressed or unsuppressed. Maybe they went overboard and opened up the gas port to avoid customer service issue due to subs without a can.
http://www.core15.com/products/parts/up ... gory_id=14
http://www.core15.com/products/parts/up ... gory_id=14
Victor Lopez
Re: Piston or no Piston?
There is never a situation where a 16 inch carbine gas system barrel benefits from an adjustable gas block. Never. No matter how large you make the gas port, it will never be too large for supersonic suppressed. (for example, the cyclic rate will never exceed Colt M4 specs).
Re: Piston or no Piston?
That sure takes the mystery out of the gas port size for 16 inch barreled 300BLKs with carbine gas--just make it the same size as the inside diameter of the gas tube, .125 inch.300Blk wrote:There is never a situation where a 16 inch carbine gas system barrel benefits from an adjustable gas block. Never. No matter how large you make the gas port, it will never be too large for supersonic suppressed. (for example, the cyclic rate will never exceed Colt M4 specs).
The one exception to your comment is it's nice to be able to turn off the gas completely for single shot quietness.
Re: Piston or no Piston?
+1 for the DI system. I like the piston cleanliness unsuppressed but since I have a can, I like to shoot with it. That negates the cleanliness as the piston system is barely cleaner suppressed. Then there's the fact that LWRC, who's at the top of the piston game and til now only made piston rifles, made their 300 BLK a DI gun. Hmmmm.....
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Re: Piston or no Piston?
OK- so if I buy a 16" 300 barrel- what about the twist? Some say 1/7"
is the NEW 1/8". I do intend to shoot WO a can and use 125gr bullets,
and if necessary- some say I will need one- adj. gas block?
Again thanks-
is the NEW 1/8". I do intend to shoot WO a can and use 125gr bullets,
and if necessary- some say I will need one- adj. gas block?
Again thanks-
Re: Piston or no Piston?
1/7 and 1/8 will work fine with 125g bullets. 1/7 may be needed for heavy bullets (more than 220g I believe). Cor-Bon says there 240g shots fine out of a 1/8. I think Robert Silvers has said that 1/7 is better for the heavies. I would trust his word on pretty much anything on a 300BLK AR. He is a engineer in the firearms industry not a net ninja like me and others.
Victor Lopez
Re: Piston or no Piston?
I have not been able to make 1/7 be less accurate with supersonic and I am sure 1/7 is better for subsonic.
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