What brand bolt carrier group would you recceomend??

[vintagearms]

Headspace is a non issue with AR's for starters. As long as its made from a reputable vendor, it will be fine.

[L4D]

As long as its made from a reputable vendor, it will be fine.

let me guess

BCM
DD
LMT


lol
there is just too much play with brand names in this thread.

[JJ1911]

I own full auto BCM BCGs and a Fail Zero BCG. I honestly feel like the BCM is a great quality product, I have had zero problems with em. I bought a fail zero just to try it out and so far it has performed admirably, but no better than the BCM did. I still lube the Fail Zero which I know is "not necessary" but its just too hard to give up old habits.

Long story short: BCM Bolt Carrier Group is great. I got the full auto because it was the same price as the SA. It is a bit heavier but not by much.

[Fiiyablade]

I had no problems with my bcm bcg. I actually bought another one for my 2nd build

[feeesh]

I went BCM and after 700 rounds, haven't had a problem yet.
then again i've only shot 700 rounds.
and probably overcleaned it twice in that time.
and it's my first AR.

so what do i know?

[bohoki]

i got one from rock river arms a full chromed and it works fine

only $130 delivered

it is of the hybrid type carrier the rear is cut away but the firing pin is fully shrouded(unlike my bushmaster bolt)

[dieselpower]

I am buying a new bolt carrier group for my first build and need advice, and any and all help is appreciated. I currently have a spike lower, DD upper, RRA lower parts kit, magpul ubr stock.

Sounds like a solid build. You can toss in a little BCM semi-auto or FA BCG, the Spikes logo on a Spikes lower looks hot too. Stag semi-auto, Stage FA, Armalite Semi-auto Armalite FA. They are mostly all the same when you know what to look for.

100-150 maybe 200 if it is needed to get something special. I see them for around 79.00 to over 250.00 and I dont really know what is the major difference. Should I match the brand to the upper like also getting a daniel defense bolt carrier group since my upper is daniel defense. Or should I get a Noveske bolt carrier group since I am probably getting a noveske barrel.

You dont have to match, but since you are buying the BCG and Upper separate, I would NEVER EVER buy a off brand without a headspace Go-NoGo gage. So sticking with a major retailer gives you a bit of protection from a mis-assembled BCG. $79 = a non-tested semi-auto, $150ish = a MPI tested FA, $250 = a custom coated uber tactical cool tested, retested, blessed by God FA BCG....and I am not flaming them one bit..you get what you pay for.

I've read that Spikes and BCM are from the same place, they just have a different logo etched. Pick the one that is in-stock or the logo you like best.

80% of the BCGs come from the same place. Its how they are assembled, tested and coated afterward that is where you see the differences. I know a large amount of BCGs in civilian hands are CMT. (and No that doesnt mean Stag)

don't mean to thread jack, this ^^ x3.

Also, I want to say yes, but also want to make sure, when buying a new BCG for an Upper, we need to check headspacing with a go/no-go gauge, right?

You should when you buy separate like the OP did, but its not a MUST. If you buy a higher end BCG there is only like a small chance it will be off. Never assemble your own unless you are very familiar with what you are doing.

fail zero

+1 Agree

K, I gave a shallow effort to look this up on my own, but, what is the difference between an auto bolt and standard. The BCM auto is 2x as much. Does it seem to matter for the average user? Oh and why?

Semi-autos for the most part are just not tested to the standard FA are.

1) The tail end isnt long enough to trip an autosear, so its a semi-auto BCG. Sometimes as another poster said the entire tail is missing.

2) Semiautos are sometimes not tested to the degree FA BCG are. This doesnt mean they are made different. The chance of a bad BCG are small due to manufacturing advances in the last 10 years. But on a FA BCG that chance is still outside of the Military requirements. Every FA BCG is tested one at a time. Semi-autos are tested in batches. 100 produced, 10 tested. If the 10 pass the other 90 are accepted as good. It is very rare to have 10 randomly picked test good and one or more in the remaining 90 to be bad...in fact its nearly impossible...but near and almost doesnt cut it with some folks. For me...I dont care, I dont fire full auto and I dont bumpfire.

3)High end coated can be on either SA or FA BCG. Chrome was once the rage with everyone, but when you use a chrome BCG you wear out the upper faster. You will only find Chrome BCG in Training Commands, Display and Show Commands. In the civilian world they are for match grade use, where 1000 shots a year is all the BCG is going to see or for that special cool look.
I would avoid Chrome if you plan on putting a few thousand down the pipe every month or so.

4)Most FA BCG are tested. BCM, Stag, Armalite, and Colt all sell both SA and FA BCGs. I dont know if the others sell both, most only sell one or the other.

[garuda7]

+1 for BCM
They're as high quality as they come and alot less than their competitors.

[odysseus]

If I would get anything chrome, just get the bolt, not the carrier where the hardness wear factor is the issue. Really like most everyone here is saying, go with a known brand that is solid and tested MPI. Make sure the extractor springs are spec and etc. Most of the top brands noted here will do you very well.

AR15 rifle is not $$$ to shoot and maintain.

[car15]

What length of gas system ? I would spend more on a carbine length.

[Ub3rDorK]

forgive my ignorance but will this work?

http://www.bravocompanyusa.com/BCM-Bolt-Carrier-Group-MPI-Auto-M16-p/bcm%20bolt%20carrier%20group%20auto%20mp.htm

[dieselpower]

What length of gas system ? I would spend more on a carbine length.

If you are saying to spend more money on a BCG for a carbine, there is something positive there. A carbine does slam that BCG around, so an FA is best, but I use SA in carbine gas system without issue. A 14.5" barrel now you are seeing some serious timing issues, so a FA is better then a SA, slightly more weight and tested.

[dieselpower]

forgive my ignorance but will this work?

http://www.bravocompanyusa.com/BCM-B...0auto%20mp.htm

yup, good to go

[SDgarrick]

Semi-autos for the most part are just not tested to the standard FA are.

1) The tail end isnt long enough to trip an autosear, so its a semi-auto BCG. Sometimes as another poster said the entire tail is missing.

2) Semiautos are sometimes not tested to the degree FA BCG are. This doesnt mean they are made different. The chance of a bad BCG are small due to manufacturing advances in the last 10 years. But on a FA BCG that chance is still outside of the Military requirements. Every FA BCG is tested one at a time. Semi-autos are tested in batches. 100 produced, 10 tested. If the 10 pass the other 90 are accepted as good. It is very rare to have 10 randomly picked test good and one or more in the remaining 90 to be bad...in fact its nearly impossible...but near and almost doesnt cut it with some folks. For me...I dont care, I dont fire full auto and I dont bumpfire.

3)High end coated can be on either SA or FA BCG. Chrome was once the rage with everyone, but when you use a chrome BCG you wear out the upper faster. You will only find Chrome BCG in Training Commands, Display and Show Commands. In the civilian world they are for match grade use, where 1000 shots a year is all the BCG is going to see or for that special cool look.
I would avoid Chrome if you plan on putting a few thousand down the pipe every month or so.

4)Most FA BCG are tested. BCM, Stag, Armalite, and Colt all sell both SA and FA BCGs. I dont know if the others sell both, most only sell one or the other.

Thanks for the info Sir.

[Ub3rDorK]

yup, good to go

thank you!