$80 Phosphate BCG with Carpenter 158 Steel

[calicojack]

At PSA. Phosphate is the way to go!

https://palmettostatearmory.com/psa-custom-full-auto-phosphate-bolt-carrier-group-by-microbest.html

 

[SkiPatrolDude]

Very very good deal. If I am not mistaken these also have Sprinco ejector /extractor springs. I bought one to replace an out of spec BCM bolt that was creating accuracy issues and it’s been stellar.

I believe these are rebranded Microbest carriers just as SOLGW is.

 

[outrider58]

Very very good deal. If I am not mistaken these also have Sprinco ejector /extractor springs. I bought one to replace an out of spec BCM bolt that was creating accuracy issues and it’s been stellar.

I believe these are rebranded Microbest carriers just as SOLGW is.

I know they were doing the same thing with Toolcraft, but they usually put that somewhere in the advert, IIRC.

 

[calicojack]

I know they were doing the same thing with Toolcraft, but they usually put that somewhere in the advert, IIRC.

Looks like they did ...

"The PSA Custom Series has teamed up with Microbest to produce the PSA Custom Fathers of Freedom 5.56 Full Auto Profile Phosphate Coated Bolt Carrier Group."

 

[Growler215]

At PSA. Phosphate is the way to go!

https://palmettostatearmory.com/psa-custom-full-auto-phosphate-bolt-carrier-group-by-microbest.html

Why phosphate over nickel boron or nitrided?

 

[clandestine]

Why phosphate over nickel boron or nitrided?

NiB is an absolutely terrible BCG finish and Nitride often leads to gas system inefficiency and often leads to a bolt more likely to break at the lugs or cam pin.

 

[El_flasko]

NiB is an absolutely terrible BCG finish and Nitride often leads to gas system inefficiency and often leads to a bolt more likely to break at the lugs or cam pin.

Good morning Kind Sir. Hope you and yours are well. Not trying to hijack the OP, but your comment got me thinking. I grabbed a toolcraft NiB from PSA on a sale for my Jailed SBR. Haven’t been able to shoot it yet obviously, but I assume it’s good to go for now at least. Found a couple “Gunlab” BCGs I picked up during the great shortage in the recent past. Got them from MWG I believe. They look decent to me at a glance, but pickings were slim back then. Are they decent or trashy in your professional opinion. They’re spares so not hugely concerned, more concerned I can’t find too much info on them aside from being out of stock for a while now on MGW.

Appreciate your input, and apologies to the OP for the sidetrack

 

[outrider58]

Good morning Kind Sir. Hope you and yours are well. Not trying to hijack the OP, but your comment got me thinking. I grabbed a toolcraft NiB from PSA on a sale for my Jailed SBR. Haven’t been able to shoot it yet obviously, but I assume it’s good to go for now at least. Found a couple “Gunlab” BCGs I picked up during the great shortage in the recent past. Got them from MWG I believe. They look decent to me at a glance, but pickings were slim back then. Are they decent or trashy in your professional opinion. They’re spares so not hugely concerned, more concerned I can’t find too much info on them aside from being out of stock for a while now on MGW.

Appreciate your input, and apologies to the OP for the sidetrack

If those are phosphate finished, make sure the bolt receiver and gas key are chrome lined. That's a place to start. It appears the gas key it mounted with type 8 screws, which is proper. Check for proper torquing of same by applying 30 in/lbs left pressure(loosening). If they don't come loose, they are more than likely properly torqued on.

 

[El_flasko]

I went back and found my old order from MWG and here’s what I found (Attached)

 

[outrider58]

Nitride finish, so no chrome lining required.

 

[El_flasko]

Nitride finish, so no chrome lining required.

Nice. Back in 2021 I seem to remember a shortage of BCGs and like a lot of other folks I grabbed a couple when they popped up as spares. MGW had been good to me before but never did find anything on Gunlabs directly. Figured they might be rebranded. Thx for the info and I’ll check the torque on them this evening. For some reason I thought Toolcraft NiB were gtg, I suppose I was mistaken. I’d imagine it’s fine for range duty.

Thanks for the info

 

[clandestine]

Good morning Kind Sir. Hope you and yours are well. Not trying to hijack the OP, but your comment got me thinking. I grabbed a toolcraft NiB from PSA on a sale for my Jailed SBR. Haven’t been able to shoot it yet obviously, but I assume it’s good to go for now at least. Found a couple “Gunlab” BCGs I picked up during the great shortage in the recent past. Got them from MWG I believe. They look decent to me at a glance, but pickings were slim back then. Are they decent or trashy in your professional opinion. They’re spares so not hugely concerned, more concerned I can’t find too much info on them aside from being out of stock for a while now on MGW.

Appreciate your input, and apologies to the OP for the sidetrack

We are well. Thank you for asking. I hope you have been well.

That BCG is geared for a plinker in my opinion.

The screws used for the carrier key are not of the proper type for this application (the heads are a giveaway). The staking it quite good though.

I ones from this brand that I have inspected lacked sealant between the carrier key and carrier and tended to be in the middle of the road in regards to gas efficiency. If you have a gun that's overgassed, that usually overcomes the efficiency issue.

The bolts are 9310 but they list them improperly on the website. 9310 Bolts when nitrided can be less durable. DLC, Chrome, or NP3 cause less issues with life on 9310

 

[El_flasko]

We are well. Thank you for asking. I hope you have been well.

"That BCG is geared for a plinker in my opinion.

The screws used for the carrier key are not of the proper type for this application (the heads are a giveaway). The staking it quite good though.

I ones from this brand that I have inspected lacked sealant between the carrier key and carrier and tended to be in the middle of the road in regards to gas efficiency. If you have a gun that's overgassed, thas overcomes the efficiency issue.

The bolts are 9310 but they list them improperly on the website. 9310 Bolt when nitrided can be less durable. DLC, Chrome, or NP3 cause less issues with life.

Thanks for the reply my man.

 

[outrider58]

We are well. Thank you for asking. I hope you have been well.

That BCG is geared for a plinker in my opinion.

The screws used for the carrier key are not of the proper type for this application (the heads are a giveaway). The staking it quite good though.

I ones from this brand that I have inspected lacked sealant between the carrier key and carrier and tended to be in the middle of the road in regards to gas efficiency. If you have a gun that's overgassed, that usually overcomes the efficiency issue.

The bolts are 9310 but they list them improperly on the website. 9310 Bolts when nitrided can be less durable. DLC, Chrome, or NP3 cause less issues with life on 9310

Oops! Looked like the right screws from my cellie. MB

 

[calicojack]

Oops! Looked like the right screws from my cellie. MB

Thanks to you and @clandestine for the info on the screws in the carrier key. I did not realize manufacturers used different kinds of screws.

 

[clandestine]

Thanks to you and @clandestine for the info on the screws in the carrier key. I did not realize manufacturers used different kinds of screws.

You are welcome.

It's quite common for manufacturers to cut corners in that area. There are lots of screws the look right but are not. Unless you live and breathe this stuff, it's just about impossible to not be deceived by companies sales pitches.

 

[outrider58]

You are welcome.

It's quite common for manufacturers to cut corners in that area. There are lots of screws the look right but are not. Unless you live and breathe this stuff, it's just about impossible to not be deceived by companies sales pitches.

Too add on to this, usually, manufacturers will say "Grade 8 gas key screws" if they are, but not always.

 

[FZRracer400!]

Hmmm, anyone have one already? I’m starting a new build with another FN barrel, and going to use an H&R a1 receiver…….because I’m an 80’s action movie kid. Have my eye on an FN bcg, but not afraid to give these a go. Not to cut corners, but if it’s a good’n ………

 

[clandestine]

There is always a chance of issues. These BCG's in the O.P. are made by Microbest. I doubt PSA does secondary Q.C.

The companies that use Microbest and do additional Q.C. tend to reject about 5-20% depending on what they are looking for.

With PSA you get what you get.