Supressed SBR BCG options, looking for what works

[kimberseries1]

Been doing research on a few options, but none are specific to MY application. While I'm waiting on a stamp to come back, I've got time to figure this out.....

I've got:

11.5" BCM BFH upper that will be run supressed and run hard. Want to build this into battlefield reliability or as close to it as possible. I would also like to have some of these coatings if at all possible, especially since I'm running supressed.

-<span style="font-weight: bold">LMT enhanced BCG</span>, specifically the carrier:

I've read that the enhanced carrier is ONLY recommended for 14.5" or 16" barrels in Carbine gas systems. Now from what I gather, it's supposed to be for overgassed systems, and vents more gas away from the face(a big plus for this situation). Granted, I've got an 11.5" bbl so unsupressed it is definately not recommended, but I'm running supressed, so I'll be overgassed.....

Has anyone ran this with a similar setup?



-<span style="font-weight: bold">ST NiB BCG</span>:

I'm leaning in this direction for the coatings, but don't have any first hand knowledge. I think I've read that the coating adds a miniscule amount of thickness to the lugs, and can make lockup a little too tight....whcih would make extraction less reliable? Anyone running one of these?



-<span style="font-weight: bold">Young mfg. NM BCG</span>:

These say they are built to tighter tolerances.....well I'm a 1911 guy, so I know that tighter tolerances can reduce reliability substantially. Colt wartime 1911's never jam, but when the slide to frame fit and bbl to bushing fit and everything was tightened up, reliability suffered and accuracy increased.

Am I wrong to draw the same conclusions with a tighter toleranced BCG in the AR-15 platform?

Plus I think I'd rather have NiB than Chrome anyway.




Thanks in advance for any help or insight anyone has to offer. Hopefully this will help more people than just myself.









.....And NO, I will NOT switch to a piston setup.......not flaming the piston, just want to be stubborn.....

 

[Rancid Coolaid]

Re: Supressed SBR BCG options, looking for what works

First and foremost, suppressed is dirty, really dirty!

I run an 11" upper with either a can or a Noveske flaming pig. Both increase back pressure. You needn't worry about your 11.5" gun with can being overgassed, dwell time in a short barrel fights overgassing rather than contributing to.

My bolt is chromed NM and I have had no problems. No experience with the coating specified.

I would disagree somewhat on drawing parallels between tight 1911 and tight AR BCG, the physics of each is very different.

(Without the can, add a noveske pig to keep the thing dependable.)

 

[Rancid Coolaid]

Re: Supressed SBR BCG options, looking for what works

And did I mention suppressed was dirty?

 

[Twisted .308]

Re: Supressed SBR BCG options, looking for what works

You got the BCM Upper , why not run one of theirs ??

 

[Bacarrat]

Re: Supressed SBR BCG options, looking for what works

Never seen a test where one was better then another in any particular application. All 3 you listed will work.

 

[kimberseries1]

Re: Supressed SBR BCG options, looking for what works

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Rancid Coolaid</div><div class="ubbcode-body">First and foremost, suppressed is dirty, really dirty!

I run an 11" upper with either a can or a Noveske flaming pig. Both increase back pressure. You needn't worry about your 11.5" gun with can being overgassed, dwell time in a short barrel fights overgassing rather than contributing to.

My bolt is chromed NM and I have had no problems. No experience with the coating specified.

I would disagree somewhat on drawing parallels between tight 1911 and tight AR BCG, the physics of each is very different.

(Without the can, add a noveske pig to keep the thing dependable.) </div></div>

Thanks for the insight, I'm a lot more learned on the 1911 platform. Yeah, supressors are REAL dirty on DI, that's why I was hoping these coated Bolts/Carriers were counted on as GTG reliable.

I Like the Noveske pig, but I'll have an AAC QD and the can will probably always be attached. I'm planning on keeping this can dedicated so the OAL will be roughly the same as my 16" BCM M4


Yes, the chromed NM from Young was one of 'em I was looking at. How does the chrome hold up over thousands of rounds? I've seen NiB coated BCG's and they're nice, but I've not seen chromed examples after prolonged use.




Thanks for your help, me thinks I've got a better grasp of dwell time now. So a short bbl is like an exhaust system on a car that's too big, loses too much pressure, and hurts torque. A gritty similie, but works for me....

 

[kimberseries1]

Re: Supressed SBR BCG options, looking for what works

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Twisted .308</div><div class="ubbcode-body">You got the BCM Upper , why not run one of theirs ?? </div></div>


I'd like to, but I'm keeping this one supressed......so I'd rather have a NiB or chrome coating to extend periods between needed cleanings, in case I'm in a situation where I don't have access to PowderBlast & CLP.








<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Bacarrat</div><div class="ubbcode-body">Never seen a test where one was better then another in any particular application. All 3 you listed will work. </div></div>

Awesome! Thank you, that gives me some <span style="font-style: italic">peace </span>of mind......for that little <span style="font-style: italic">piece</span> of mind I've got left....

 

[Rancid Coolaid]

Re: Supressed SBR BCG options, looking for what works

Chrome holds up well.

I have no experience with titanium.

I hear the Robar NP3 is very tough, never used it on a BCG though.

If the can stays on, all is well. Without the can, it probably won't cycle reliably.

Lastly, shorter barrel means much louder, just FYI. Even with a can, it'll be louder than you think it will be.

 

[kimberseries1]

Re: Supressed SBR BCG options, looking for what works

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Rancid Coolaid</div><div class="ubbcode-body">Chrome holds up well.

I have no experience with titanium.

I hear the Robar NP3 is very tough, never used it on a BCG though.

If the can stays on, all is well. Without the can, it probably won't cycle reliably.

Lastly, shorter barrel means much louder, just FYI. Even with a can, it'll be louder than you think it will be.

</div></div>

Thanks, I got more to look at, the NM BCG did look real nice, I just wasn't sure about the chrome vs NiB. I know this will be a barker, but I'm building this for OAL 1st and sound supression 2nd. From what I can gather, the 11.5" bbl is the sweet spot for shortness & reliability. But the 5.56 isn't the greatest round to supress anyway, and I have no intention of shooting subsonic 5.56 loads.

However, my NEXT SBR, or at least upper, will be a .300 BLK. Now THAT one will be for 1st - sound supression, but 2nd - OAL looks great too! I'm just not setup for reloading yet......gotta save up spent brass from the other 2 bad boys....

 

[Rancid Coolaid]

Re: Supressed SBR BCG options, looking for what works

Actually, SW Ammo sells 300BLK at a very reasonable price. And it is good stuff, better than the remington factory stuff.

I recommend you rethink the whole thing, skip the 5.56, go stright to 300BLK. A 300BLK upper, shooting supersonics, will hit much harder than a 5.56 of the same barrel length. And subs from a 300BLK can be very quiet.

If you want a blackout eventually, I'd skip the 11.5" 5.56 and go straight to an SBR 3000blk. With a can, it will cycle subs, without (or with), it will cycle supers. You can build or you can buy. Get a pistol length gas setup and you will be good to go. Noveske makes nice stuff, or build your own.

Everything said previously about BCGs and dirtiness of suppressed shooting holds true of a 300BLK too.

 

[M82Assault]

Re: Supressed SBR BCG options, looking for what works

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: kimberseries1</div><div class="ubbcode-body">Been doing research on a few options, but none are specific to MY application. While I'm waiting on a stamp to come back, I've got time to figure this out.....

I've got:

11.5" BCM BFH upper that will be run supressed and run hard. Want to build this into battlefield reliability or as close to it as possible. I would also like to have some of these coatings if at all possible, especially since I'm running supressed.

-<span style="font-weight: bold">LMT enhanced BCG</span>, specifically the carrier:

I've read that the enhanced carrier is ONLY recommended for 14.5" or 16" barrels in Carbine gas systems. Now from what I gather, it's supposed to be for overgassed systems, and vents more gas away from the face(a big plus for this situation). Granted, I've got an 11.5" bbl so unsupressed it is definately not recommended, but I'm running supressed, so I'll be overgassed.....

Has anyone ran this with a similar setup?



-<span style="font-weight: bold">ST NiB BCG</span>:

I'm leaning in this direction for the coatings, but don't have any first hand knowledge. I think I've read that the coating adds a miniscule amount of thickness to the lugs, and can make lockup a little too tight....whcih would make extraction less reliable? Anyone running one of these?



-<span style="font-weight: bold">Young mfg. NM BCG</span>:

These say they are built to tighter tolerances.....well I'm a 1911 guy, so I know that tighter tolerances can reduce reliability substantially. Colt wartime 1911's never jam, but when the slide to frame fit and bbl to bushing fit and everything was tightened up, reliability suffered and accuracy increased.

Am I wrong to draw the same conclusions with a tighter toleranced BCG in the AR-15 platform?

Plus I think I'd rather have NiB than Chrome anyway.




Thanks in advance for any help or insight anyone has to offer. Hopefully this will help more people than just myself.









.....And NO, I will NOT switch to a piston setup.......not flaming the piston, just want to be stubborn.....

</div></div>

I have the Spike's NiB BCG in my AR... never had it fail, and clean up is pretty painless (though you still have to scrape some carbon if you want it super clean) and it has yet to fail me (~500rds down range in that rifle)

 

[kimberseries1]

Re: Supressed SBR BCG options, looking for what works

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Rancid Coolaid</div><div class="ubbcode-body">Actually, SW Ammo sells 300BLK at a very reasonable price. And it is good stuff, better than the remington factory stuff.

I recommend you rethink the whole thing, skip the 5.56, go stright to 300BLK. A 300BLK upper, shooting supersonics, will hit much harder than a 5.56 of the same barrel length. And subs from a 300BLK can be very quiet.

If you want a blackout eventually, I'd skip the 11.5" 5.56 and go straight to an SBR 3000blk. With a can, it will cycle subs, without (or with), it will cycle supers. You can build or you can buy. Get a pistol length gas setup and you will be good to go. Noveske makes nice stuff, or build your own.

Everything said previously about BCGs and dirtiness of suppressed shooting holds true of a 300BLK too. </div></div>


All true, but this is only my 2nd ar, and this is for sd/hd/fun under 150 yards. 300 blk will take that roll later, and this will be guinnea pig for different parts combinations at that time. 1st ar I keep bone stock accept for stock & grip.

 

[kimberseries1]

Re: Supressed SBR BCG options, looking for what works

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: M82Assault</div><div class="ubbcode-body">
I have the Spike's NiB BCG in my AR... never had it fail, and clean up is pretty painless (though you still have to scrape some carbon if you want it super clean) and it has yet to fail me (~500rds down range in that rifle)</div></div>

Very good to know, thank you!