BCM Bolt Carrier Group vs. CMMG BCG
jwise et al:
Making the final decisions before ordering from CMMG in the recommended manner. Given the probable backlog, there's no need to rush the order and end up not having made the best choices. To that end, I have a couple of questions. Here's the first one, which is pretty straight forward:
Earlier in the thread ( http://forums.officer.com/forums/sho...=81462&page=10 ), the merits of the Bravo Company bolt carrier group were discussed and it was suggested as a economical and effective way to fix many of the perceived shortcomings found in some of the AR-15 style weapons from less recommended manufacturers. Of course, CMMG is reported to not have these problems, so the Bravo Company bolt carrier group might be a solution in search of a problem in this case.
The Bravo Company bolt carrier group is $160 when it's in stock. Leaving out the CMMG bolt carrier group when you order gets you a $85 credit and the savings from not paying for the EGRESS upgrade (if you were going to, and you've expressed your opinion that adding an o-ring is a more economical route) is another $30 savings - so the net difference is $45 plus the shipping from Bravo Company. In other words, enough to be worth spending for a clear upgrade and enough to be worth saving if there's no benefits. So what do you get for the money?
Both the CMMG and Bravo offer the full auto carrier that seems to be recommended.
The Bravo Company bolt carrier group has:
MPI Bolt (Magnetic Particle Inspected)
Shot Peened Bolt
Chrome Lined Carrier
Chrome Lined Gas Key
Gas Key Hardened to USGI Specifications
Grade 8 Hardened Fasteners
Key Staked Per Mil-Spec
BCMâ„¢ Extractor Spring
Black Extractor Insert
Mil-Spec Crane O-Ring
CMMG's bolt carrier group has:
MPI Bolt (Magnetic Particle Inspected)
Shot Peened Bolt
Key Staked Per Mil-Spec
I can only imagine that CMMG could also claim:
Gas Key Hardened to USGI Specifications
Grade 8 Hardened Fasteners
The EGRESS upgarde would have added the:
Black Extractor Insert
Mil-Spec Crane O-Ring
Better extractor and ejector spring
as well as one piece gas ring
I don't see anything about chrome on the CMMG parts
So it looks to me that your $45 plus shipping gets you chrome lining on the carrier and key and costs you the better ejector spring (of possible worth) and the one piece gas ring (of little to no worth).
So what does the chrome in the carrier and in the gas key that you're paying for do for you? Easier cleaning? Less wear? Longer functioning between lubrication/cleanings? Enhanced corrosion resistance?
jwise et al:
Making the final decisions before ordering from CMMG in the recommended manner. Given the probable backlog, there's no need to rush the order and end up not having made the best choices. To that end, I have a couple of questions. Here's the first one, which is pretty straight forward:
Earlier in the thread ( http://forums.officer.com/forums/sho...=81462&page=10 ), the merits of the Bravo Company bolt carrier group were discussed and it was suggested as a economical and effective way to fix many of the perceived shortcomings found in some of the AR-15 style weapons from less recommended manufacturers. Of course, CMMG is reported to not have these problems, so the Bravo Company bolt carrier group might be a solution in search of a problem in this case.
The Bravo Company bolt carrier group is $160 when it's in stock. Leaving out the CMMG bolt carrier group when you order gets you a $85 credit and the savings from not paying for the EGRESS upgrade (if you were going to, and you've expressed your opinion that adding an o-ring is a more economical route) is another $30 savings - so the net difference is $45 plus the shipping from Bravo Company. In other words, enough to be worth spending for a clear upgrade and enough to be worth saving if there's no benefits. So what do you get for the money?
Both the CMMG and Bravo offer the full auto carrier that seems to be recommended.
The Bravo Company bolt carrier group has:
MPI Bolt (Magnetic Particle Inspected)
Shot Peened Bolt
Chrome Lined Carrier
Chrome Lined Gas Key
Gas Key Hardened to USGI Specifications
Grade 8 Hardened Fasteners
Key Staked Per Mil-Spec
BCMâ„¢ Extractor Spring
Black Extractor Insert
Mil-Spec Crane O-Ring
CMMG's bolt carrier group has:
MPI Bolt (Magnetic Particle Inspected)
Shot Peened Bolt
Key Staked Per Mil-Spec
I can only imagine that CMMG could also claim:
Gas Key Hardened to USGI Specifications
Grade 8 Hardened Fasteners
The EGRESS upgarde would have added the:
Black Extractor Insert
Mil-Spec Crane O-Ring
Better extractor and ejector spring
as well as one piece gas ring
I don't see anything about chrome on the CMMG parts
So it looks to me that your $45 plus shipping gets you chrome lining on the carrier and key and costs you the better ejector spring (of possible worth) and the one piece gas ring (of little to no worth).
So what does the chrome in the carrier and in the gas key that you're paying for do for you? Easier cleaning? Less wear? Longer functioning between lubrication/cleanings? Enhanced corrosion resistance?
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