Need help setting up 300 Blk

CowboyBart

CowboyBart

Sergeant
Full Member
Minuteman
Jun 14, 2007
486
10
North West WY
#1
I am setting up a 10" pistol in 300 BLK. It will shoot subsonic EXCLUSIVELY.
1) What weight buffer do I need???
2) Do I need an adjustable gas block??
3) what else am I forgetting??
This is a DI set up, not a piston.
 
#4
What @wvfarrier and @Runnineh said! H2 buffer for sure. The gas block does not "need" to be adjustable...but it is nice to have! I have one on my 300BLK SBR...and while I shoot mainly subsonic (~95%), the ~5% supersonic I do shoot only requires 1 click change for SOME of the supersonic ammo, that I have.

Most of my ammo (both sub & super) cycles the rifle without any changes to the gas block.
 
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#5
Thanx guys. I have a 16" Whisper, but this is my first path down the short barrel pistol brace road. It will be subs 100% of the time, if I want to go super I'll reach for the 16".

I just e-filed for the can - I'm guessing 10 weeks into a trust
 
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#8
HerCoStarNTheBeaverPictur said:
I don’t really understand why you wouldn’t always go with an adjustable gas block. Seems like cheap insurance.
Click to expand...
In theory an adjustable gas block introduces an additional point of failure. A properly gassed 300 BLK shouldn't need one to run reliably with subs or supers... I have a 10.5" and 16" Noveske with pistol gas and they come with a pinned non adjust block. They run 100% with every combination from subsonic unsuppressed to supersonic suppressed.
 
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#9
don’t cheap out and buy a good quality adjustable gas block. Then you won’t have to worry about a point of failure. I’ve run thousands of rounds through my Superlative Arms and Riflespeed gas blocks and have not one had an issue.
 
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#13
I don't know the barrel maker and port size. A buddy gave this too me with a bunch of Black Rain parts/receiver and asked if I could put it together. He was then killed in a M/C crash. I can measure the port, but that is as far as I can go.
I just ordered a Banish 30 for this and other guns.
 
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