Enhanced BCG"s for shorter barrels?

[Triton225]

I've read and searched a bit on this, some of it is a bit dated.
Specifically looking at the LMT Enhanced bcg or maybe the bootleg adjustable bcg.
Working with a 11.3 Carbine barrel, I think the gas port size is .70 will be shooting unsuppressed and suppressed.
Seems the lmt was designed around the 14.5 and some info about its not really suited for shorter barrels.
Anyway, looking if anyone can say either helps in the above scenario. Keeps gun any cleaner, help with gas in face, any other teal benefits?
Also, from a more in depth (engineering perspective) if anyone has the knowledge base. Probably more related to the lmt, does it improve longevity or durability?

 

[Clayman]

I've read and searched a bit on this, some of it is a bit dated.
Specifically looking at the LMT Enhanced bcg or maybe the bootleg adjustable bcg.
Working with a 11.3 Carbine barrel, I think the gas port size is .70 will be shooting unsuppressed and suppressed.
Seems the lmt was designed around the 14.5 and some info about its not really suited for shorter barrels.
Anyway, looking if anyone can say either helps in the above scenario. Keeps gun any cleaner, help with gas in face, any other teal benefits?
Also, from a more in depth (engineering perspective) if anyone has the knowledge base. Probably more related to the lmt, does it improve longevity or durability?

The LMT is one of the best carriers for suppressed short barrels available imo.

It has an altered cam path that delays unlocking and by doing so drops chamber pressure. Paired with an adjustable gas block and the Vltor A5 it's my personal favorite set up. Smoother operation, less gas in the face, lower carrier velocity, etc.

The LMT bolt is one of if not the most durable on the market. It is highly unlikely you would ever break it. Iirc there are examples well past 50,000 rounds.

Straight from LMT

"This carrier group was designed to function effectively in full-auto, suppressed, and short barrel weapon systems, and it is made of materials far more durable than your standard fare. Quite simply, it’s the best possible upgrade for your rifle to increase reliability and functionality.

Behold the laundry list of enhancements our design brings to the table:

Carrier:

• Altered cam path for longer dwell time and more robust extraction
• Modified gas hole improves gas flow across the bolt’s tail
• Additional gas ports on right side and modified orientation to improve gas flowing through the ejection port, and not into your face
• Relief grooves added to the top and bottom to channel debris and maintain fluid movement

Bolt:

• Built from a proprietary material that is not only stronger than the standard bolt but easier to clean as well
• Modified locking lugs provide flexibility and durability in dealing with high-pressure, overgassed loads
• “Lobster tail” extractor utilizes two springs to allow stronger and more consistent extraction with drastically improved spring life"

The other is the surefire obc. Similar things going on, altered cam path and other enhancements. Quite a few of the other enhancements seem tailored to full auto but will still carry over to suppressed semi autos.

 

[alamo5000]

I've read and searched a bit on this, some of it is a bit dated.
Specifically looking at the LMT Enhanced bcg or maybe the bootleg adjustable bcg.
Working with a 11.3 Carbine barrel, I think the gas port size is .70 will be shooting unsuppressed and suppressed.
Seems the lmt was designed around the 14.5 and some info about its not really suited for shorter barrels.
Anyway, looking if anyone can say either helps in the above scenario. Keeps gun any cleaner, help with gas in face, any other teal benefits?
Also, from a more in depth (engineering perspective) if anyone has the knowledge base. Probably more related to the lmt, does it improve longevity or durability?

The only one that I have heard of that gets great reviews is the one from Surefire.

The gun will not be kept any cleaner no matter what you use. The issue of gas in the face is a 'maybe' depending on a whole host of other factors.

 

[alamo5000]

This is the one I mentioned above just in case you were wondering. Watch the YouTube videos on it.

SF-OBC-556 | Optimized Bolt Carrier Group for M4/M16/AR-Variant Rifles & Carbines | SureFire

Invented by Jim Sullivan, one of the original designers of the M16, the SureFire Optimized Bolt Carrier (OBC) doubles the reliability of any M4/M16/AR variant weapon system during suppressed and suppressed firing.

www.surefire.com

 

[call_me_ski]

LMT started doing a one hour q&a on their you tube channel once a month earlier this year and one of them focused on the enhanced carrier. There are too many variables to be able to say weather or not it will work or be a benefit in your set up. I would start there.

 

[thehun]

Enhanced Carrier was designed for the military and they didn't see much improvement...that said...it is a good piece of kit.

Honestly, the best thing you can do is get an adjustable gas block like a Superlative that allows bleed-off at the gas block...on shorties running suppressed you might look into a nickel teflon coated BCG to help with cleaning and slight smoothest...

However I will also echo the VLTOR A5 buffer system...

 

[Triton225]

I do have the a5 system by the way.
This is kinda what I have read. Some say great, some say not much benefit, but no doubt a quality item.
Just may be a gun to gun setup that makes the differences in opinions.

 

[iktomi]

I've read and searched a bit on this, some of it is a bit dated.
Specifically looking at the LMT Enhanced bcg or maybe the bootleg adjustable bcg.
Working with a 11.3 Carbine barrel, I think the gas port size is .70 will be shooting unsuppressed and suppressed.
Seems the lmt was designed around the 14.5 and some info about its not really suited for shorter barrels.
Anyway, looking if anyone can say either helps in the above scenario. Keeps gun any cleaner, help with gas in face, any other teal benefits?
Also, from a more in depth (engineering perspective) if anyone has the knowledge base. Probably more related to the lmt, does it improve longevity or durability?

Bootleg BCG sample size of one. Experimented with carbine gas, 11.5" Rosco, Superlative adjustable gas block.

Tuned to a mid-high back pressure can, I couldn't run unsuppressed from the BCG adjustments alone.

Manufacturing details seemed very good (it's not in front of me, so I can't go into specifics.)

LMT and Surefire offering are both pretty awesome engineering (both use extended cam channels)... surefire incorporates deadblow and BCG overtravel to prolong cyclic rates.

Bootleg restricts gas from the key in to the gas rings. Very different component, but potentially very cool with the right length barrel.

 

[Jackalope]

I’m running a Bootleg carrier with a Wilson Combat 11.3” barrel and Surefire SOCOM RC2 suppressor. With an H2 buffer and Tubbs flat wire spring, it’s the softest shooting 5.56 rifle I’ve ever experienced. It cycles equally well suppressed and unsuppressed with the carrier set to the proper position.

Gas blowback isn’t too bad but it’s definitely not eliminated. Rifle still gets filthy instantly.

 

[thedude824]

I wont know for certain until this latest build is done and I can compare directly. All of my ARs have adjustable gas blocks and heavier buffers. Im beyond happy with them from a functionality and smoothing of recoil standpoint.
My 300 blk out has the Seekins select adjustable gas block so I can have it set to shoot suppressed supers all the way to unsupppressed subs (not that I would do that) with the throw of a lever. Unfortunately I have to take the handguard off as the Fortis Switch rail won't fit over the block.. That being said I wanted a rifle that was more duty capable and could shoot suppressed and unsuppressed 6.5 Grendel effectively without massive gas in the face and brutal recoil.
For that scenario I'm using the LMT enhanced carrier and a JP Enterprises enhanced bolt. Im also using a Vltor A5 system (A5H3) and a Radian SD charging handle and a fixed/pinned gas block. From my research it seems like that's where the LMT carrier will shine.