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BCM Uppers w/ Low profile Gas Block
I was just looking very hard as a BCM 12.5 w/ VTAC TRX 11"
Obviously the block is low profile … but I'd like to know how it is mounted on models with FF guards? Are they dimpled/screwed or pinned like a FSB?
Asking here for the knowledge base.
Appreciate any info. Thanks in advance.
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