school me on BCG's please

[Quadforce]

can you guys school me on BCG's I see the prices from 79 all the way to 279+ . I am buying an upper that does not come with BCG so just wanted to know what pros and cons of the cheaper ones I am looking at. Thanks

[HarrisonTX]

In here for 'birth control glasses'

[KBScobravert]

can you guys school me on BCG's I see the prices from 79 all the way to 279+ . I am buying an upper that does not come with BCG so just wanted to know what pros and cons of the cheaper ones I am looking at. Thanks

Don't put a 79 bcg in a rifle you will end up with north of 800 in. And don't put a 279+ bolt in a sub 800 build.

I like my nicer builds to have either a coated or very smooth finish. Easier to clean and will function smoother.

Truck gun build, cheap, use cheaper parts. They don't cycle as smooth and have rougher finishes that traps crap.

I have a couple 150 Fail Zero BCGs and they work great. Smoothly coated finish means I can pull it out, hit it with a little solvent and wipe clean with a t-shirt rag. Lube it up and through it in.

I have a couple 79 PSA BCGs and they don't clean as easily or slide as smoothly.

Both will work in each other's uppers but you can feel the differences.

[Quadforce]

thanks for the info Kieth. I already had the lower it is a CMMG so it is not junk but not top of the line either. I decided to pick up the DOA arms upper it is for my daughter and really like the way it looks and the long rail. but do not think it has the best barrel but figured I could upgrade it down the road.

http://shop.doasales.net/Triton-16-Complete-TSR-Slimline-Upper-Receiver-TRI16TSR.htm

[YALE]

I generally shoot for a full auto bcg, at the lowest price available. If you can find vintage FA milsurp carriers, they'll be smooth as butter. CJ showed me the light there.

[Quadforce]

what is the difference between M16 and AR15 bcg's ?

[SBFORDTECH]

what is the difference between M16 and AR15 bcg's ?

Different profile on the rear of the carrier. The M16 has more material for added weight to help the cycling of full auto and burst fire. I believe the added material also trips the auto sear mechanism.

I'm sure someone else here can elaborate but that is how I understand it.

[CJ]

Different profile on the rear of the carrier. The M16 has more material for added weight to help the cycling of full auto and burst fire. I believe the added material also trips the auto sear mechanism.

I'm sure someone else here can elaborate but that is how I understand it.

The M16 carrer moves the shelf further forward so it can catch and trip the auto sear. Semi-auto bolts are cut further back so they cannot trip an auto sear.



The "half-circle" BCG's are during the ban era, and were M16 BCG's which had the bottom milled off (quite labor intensive I might add). The SP1 carrier is from Colt SP1's, they have the furthest cut back shelf, and because of their location, spawned the creation of lightning links (all lightning links use SP1 carriers).

[David]

Buy the cheapest one and put it in the gun and call it a day.

[LANTIRN]

In here for 'birth control glasses'

Haha me too. Happens every fucking time.

[black2002ls]

Digging this back up. I need a BCG for my SBR. I've seen the comments to pick up the cheapest one and go to town. I've seen comments suggesting that the BCG has an effect on accuracy. A lot of comments saying not to spend less than $100, etc.

I am hoping to find a good deal during the black Friday sales, but I also want to make an informed purchase and get the best bang for the buck.

The gun currently has a basic LPK, SS barrel, and a PSA upper. I plan to do a trigger upgrade at some point.

[SBFORDTECH]

Aim Surplus 3.0 NiB and Nitride BCGs are great and inexpensive. I have a couple of them and have had no issues whatsoever with them. My nitride BCG got 800 rds through it last weekend. Wipes clean and cycles smooth. AIM has good customer service as well.

[black2002ls]

Aim Surplus 3.0 NiB and Nitride BCGs are great and inexpensive. I have a couple of them and have had no issues whatsoever with them. My nitride BCG got 800 rds through it last weekend. Wipes clean and cycles smooth. AIM has good customer service as well.

http://www.aimsurplus.com/product.aspx?item=XAIMBCGN3BDG&name=AIM+AR%2fM16+.223%2f5.56+Nitride+9310+MPI+Bolt+Carrier+Group&groupid=723

This one? I've had great experiences ordering from AIM. I'm hoping they will discount it a bit next week

[SBFORDTECH]

This one....

http://www.aimsurplus.com/product.aspx?item=XAIMBCGN3E3&name=AIM+Evolution+3.0+AR%2fM16+.223%2f5.56+Nitride+9310+MPI+Bolt+Carrier+Group&search=bolt+carrier+group

And....

http://www.aimsurplus.com/product.aspx?item=XAIMBCGNIBE3&name=AIM+Evolution+3.0+AR%2fM16+.223%2f5.56+NiB+9310+MPI+Bolt+Carrier+Group&search=bolt+carrier+group

Both are currently sold out though..

I'm hoping to be able to stock up on a bunch of extra stuff on Black Friday. I haven't really bought too much in the last month or so hoping to get some deals.

[CJ]

No, they don't have an effect on accuracy. Your bolt head can, but it's entirely how the bolt face contacts the barrel extension. I've gone through 5 bolt heads testing accuracy and found one that worked the best. We did this with Keith's rifle once. The bolt itself doesn't matter, it's simply how one meets up with the other, entirely random.