BCM VS Colt BCG

[markm]

For L.E. use which finish is preferred Phosphate or Nitrate finish for an M-16 BCG? Thank You.

Phosphate every day of the week. That's the TDP specification. That's the Colt gun BCG finish, etc.

[lysander]

Even without glasses I can clearly see the difference in machining marks when comparing the single PSA carrier I have with everything else... Toolcraft, Colt, AO are not anywhere near finished the same.

The surface finish on the bolt carrier is specified as 125 microinch, except where noted. The noted areas being the chromed areas, the cam track, the wear rails, the 0.251 diameter inside where you can't see it, and one or two other places. There are a few places, like the top and bottom cuts that are a 250 finish.

This is a 125 surface finish (the area with the engraving is about a 32 microinch finish:

[StreetSurvival]

Many Thanks, Gentlemen.

[veeklog]

Like mentioned they were down to $79 during the BF weekend. $89.95 is the normal price I believe.
https://ar15discounts.com/products/m...-chrome-lined/

Thank you! Been wanting a Microbest for a long time even though they are MILSPEC for Colt

[BufordTJustice]

For a Colt rifle yes. For anything else, nope.

This.


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[RHINOWSO]

Whats the purpose for “a few” spare BCGs?

When something is broken, worn, or a part lost during cleaning... you aren't beholden to a company and shipping to get your rifle working again.

[1168]

When something is broken, worn, or a part lost during cleaning... you aren't beholden to a company and shipping to get your rifle working again.

One spare BCG gets you there.

[JediGuy]

I’m hoping some of the concerned nabbed a couple Expo Arms BCG’s from Primary Arms today. $80 is hard to beat.

[markm]

It's nitrided. Can't do it.

[titsonritz]

It's nitrided. Can't do it.

Same goes for me. A SIONICS Np3 is the only non-phosphate BGC I own or ever will spend my money on.