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12/13/2013 6:05:00 PM EDT
I am thinking of upgrading the BCG in my CMMG 308 and I have found two that are comparable in price but are different manufactures which one would you go with?
Shadow Ops BCG
Rainer Arms BCG
12/13/2013 7:19:43 PM EDT
[#1]
Quoted:
I am thinking of upgrading the BCG in my CMMG 308 and I have found two that are comparable in price but are different manufactures which one would you go with?
Shadow Ops BCG
Rainer Arms BCG
View Quote



I know the search sucks....

The Rainier was (for a time) a poorly machined bolt that several here were pretty unhappy with.  The Shadow Ops is very, very nice.
12/13/2013 7:38:26 PM EDT
[#2]
What would my CMMG 308 BCG be worth it only has 20 rounds on it I googled it and they sell new for 279-299$
12/13/2013 8:01:28 PM EDT
[#3]
I like the Shadow Ops.  

Keep your CMMG BCG as a back-up.  Two is one.  One is none.
12/13/2013 8:07:48 PM EDT
[#4]
I usually just keep 1 spare bolt for each caliber of AR variant I have. Seems to me the carrier should never wear out so maybe just keep the CMMG bolt and sell the carrier? ETA I usually keep extra extractors for each one too
12/13/2013 8:51:25 PM EDT
[#5]
Quote History
Quoted:
What would my CMMG 308 BCG be worth it only has 20 rounds on it I googled it and they sell new for 279-299$
View Quote


Seeing as the Shadow Ops bolt is $236 and is very nice, I'd say about $210 shipped.  Otherwise just get a new Shadow Ops bolt.
12/14/2013 10:49:16 AM EDT
[#6]
Been trying to find out if I should go with the si defense nib bcg or the shadow ops. Anyone have any input on the si defense?
12/15/2013 7:02:21 AM EDT
[#7]
Why are you upgrading your BCG to one that is basically the same thing? Is there an issue with functionality?

Quoted:
I am thinking of upgrading the BCG in my CMMG 308 and I have found two that are comparable in price but are different manufactures which one would you go with?
Shadow Ops BCG
Rainer Arms BCG
View Quote

12/15/2013 10:38:53 AM EDT
[#8]
I have NIB BCG's in every other rifle but this one and I like how easy they are to clean but other than that you are correct my current BCG works fine
12/15/2013 12:54:58 PM EDT
[#9]
Well my suggestion is to not bother. For the most part NIB is a BS coating in most cased it is poorly applied and wears off. It also gets gummy when you get the bolts and carriers super hot.  On the lower end BCG's they don't head space correctly because the coating is too thick. My suggestion is get a JP bolt and carrier if you an upgrade. JP doesn't sell anything with NIB, KAC and LMT use hard chrome and NP3 coated parts.

Quote History
Quoted:
I have NIB BCG's in every other rifle but this one and I like how easy they are to clean but other than that you are correct my current BCG works fine
View Quote

12/16/2013 7:31:28 PM EDT
[#10]
I went ahead and ordered the NIB 308 BCG from shadow ops looks like I will have a nice CMMG up for sale! Just hope my accuracy does not change as the rifle is a tack driver right now!
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