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Just ordered a 9" 300blk upper

miller12

Joined: Jul 2014

Posts: 150

EE: 0% (0)

WV, USA

Posted: 7/8/2026 1:57:23 PM EDT

This will be my first 300 blk
Plan on running suppressed mainly. What buffer is suggested?

tact521

Joined: Jun 2015

Posts: 76

EE: 0% (0)

USA

Posted: 8/6/2026 1:58:52 AM EDT

[Last Edit: tact521][Edited] [#1]

BCM's current webpage for their complete weapon systems has this listed for their sbr 300 blk as "USGI H Buffer (1 USGI Tungsten, 2 Steel)".

https://bravocompanymfg.com/cqb-300blk-recce-9-kmra.html

https://youtu.be/OyW0xBf4wx8?si=QpOHeHAkF_nymjxv
Jump to the 3:13sec mark

KRAV13alex

Joined: Oct 2021

Posts: 57

EE: 0% (0)

FRA

Posted: 8/6/2026 2:33:07 AM EDT

[#2]

Perhaps it would be better to try it out first and then make adjustments,
as it may depend on the type of signature moderator you use.

GimmeLibertee

Joined: Aug 2020

Posts: 665

EE: 100% (2)

VA, USA

Posted: 8/18/2026 8:23:38 PM EDT

[Last Edit: GimmeLibertee][Edited] [#3]

My 9” BCM 300 BLK runs supers and subs, suppressed and unsuppressed, 100% with an H2 and Springco blue spring.

For your first 300 BLK, you’re getting the best one.

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Just ordered a 9" 300blk upper

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Just ordered a 9" 300blk upper

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Just ordered a 9" 300blk upper