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View Full Version : Educate me on AR bolts "BCG" please


Daytripper63
05-15-2012, 7:55 PM
Just like the title says, please educate me on AR bolts BCG I see threads on lowers and barrels etc but what about Bolt Carrier Groups, whats the differences etc.
Thanks

five.five-six
05-15-2012, 8:08 PM
picture is worth 1,000 words. 1-10 is the BCG, 5-10 is the bolt

http://www.bevfitchett.com/ar15-to-m16-conversion/images/2703_6_4-m16-assembly.jpg

mhael
05-15-2012, 8:12 PM
Any suggestions for the best brands of BCG?

ChaneRZ
05-15-2012, 8:13 PM
BCM, LMT, DD,

Press Check
05-15-2012, 8:15 PM
Any suggestions for the best brands of BCG?

Colt; hands down, bar none.

FourLoko
05-15-2012, 9:41 PM
Colt; hands down, bar none.

nope

Ron-Solo
05-15-2012, 10:33 PM
Stag and DS Arms also make excellent BCG parts.

MrPlink
05-15-2012, 11:04 PM
get a FA one, Mp/Hp tested. After that they are all the same more or less so just get what is available/affordable. unless you get into the fancy coated ones or chrome carriers...

Dreaded Claymore
05-15-2012, 11:42 PM
Colt, Bravo Company Manufacturing (BCM), Lewis Machine & Tool (LMT), and Daniel Defense (DD) make the best bolt carrier groups. If you're looking for quality, make sure your bolt is magnetic particle inspected (MPI), and "full auto" or "M16" bolt carriers are generally the best. (They are heavier and more reliable.)

jdberger
05-15-2012, 11:48 PM
KAC has their own proprietary bolt design. Fail Zero has a coated carrier that's pretty slick, too.

FeuerFrei
05-16-2012, 9:33 AM
google;
ar15 gas key staking
ar15 bolt
ar15 extractors
ar15 bolt gas rings
ar15 firing pins
....

RDT
05-16-2012, 11:02 AM
KAC or BCM. Both awesome, and both are MPI.

L4D
05-16-2012, 11:17 AM
Any Should be just fine.
But if you are looking for one that has been MP/HPI tested the spikes tactical BCG is the cheapest I have ever come across. $114 shipped when it's in stock.

S470FM
05-16-2012, 4:46 PM
LWRCi bolts are second to none.

Cactus_Tim
05-16-2012, 8:20 PM
I bought the BCM Bolt Carrier Group (MPI) - Auto (http://www.bravocompanyusa.com/BCM-Bolt-Carrier-Group-MPI-Auto-M16-p/bcm%20bolt%20carrier%20group%20auto%20mp.htm).
It cycles real smooth with a Spikes T2 heavy buffer (http://www.joeboboutfitters.com/Spikes_Tactical_T2_Heavy_Buffer_p/sp-sla00t2.htm).

Here's the Spike's M16 BCG (http://www.joeboboutfitters.com/Spike_s_Tactical_M16_BCG_p/sp-st5bg01.htm) for a good price.

WilliamAnderson
05-17-2012, 3:16 AM
Spike's tactical nickle boron. It's very expensive, but it's really awesome.. I love mine. HP/MP too.

5.56in6.61
05-17-2012, 3:21 AM
BCM. You will not go wrong with Bravo company manufacturing. Just absolutely the highest of quality.

Sent from my LG-P999 using Tapatalk 2

Wildhawk66
05-17-2012, 5:16 AM
Young Manufacturing also makes some really nice specialty bolt groups depending on what you are looking for:

http://www.youngmanufacturing.net/store.php?Bolt_Carriers-pg1-cid38.html

Some will try to steer you away from chrome carriers as there is a belief that they wear out the inside of the upper faster. Others say the chrome creates less wear. Either way, the Young quality is excellent.