11.5 SBR Buffer & Spring Combo

[Lamented]

I own a BCM 11.5” I plan on shooting this suppressed the majority of the time. I want the gun to function both suppressed and unsuppressed. I was looking for the best combo of spring and buffet. From what I read it seems the sprinco blue and H2 is what I’m looking for.

I also planned on using an LMT EBCG with standard bolt to help tame a little of the gas to the face. Has anyone tried this combo? Any suggestions are welcome.

Thanks

[Clint]

It is better to limit the gas drive first and then use a heavier buffer to compensate for the suppressor.

BRT recommended setup for 50/50 suppressed use:
EZTUNE gas tube below
Mil-spec CAR spring
H buffer for unsuppressed use
H2/H3 buffer for suppressed use

No other "upgrades" are required.
Save the fancy BCGs, super strong springs and adjustable things for another day.

https://www.m4carbine.net/showthread...TUNE-Gas-Tubes
https://blackrivertactical.com/WP/BR...CAR-p194049554

[jwhyte]

Some gas to the face is normal just be prepared for it. I will second everything @Clint said. I have a BRT 11.5" carbine length that is softer shooting and less gassy than my 16" BCM middy. Both are run with carbine springs and H2 buffers. I have a BRT midlength gas tube on the way for 50/50 suppressed to smooth it out. Proper gassing goes further by fixing the issue vs compensating for it like a buffer/spring would do.

Sent from my SM-G981U using Tapatalk

[Lamented]

It is better to limit the gas drive first and then use a heavier buffer to compensate for the suppressor.

BRT recommended setup for 50/50 suppressed use:
EZTUNE gas tube below
Mil-spec CAR spring
H buffer for unsuppressed use
H2/H3 buffer for suppressed use

No other "upgrades" are required.
Save the fancy BCGs, super strong springs and adjustable things for another day.

https://www.m4carbine.net/showthread...TUNE-Gas-Tubes
https://blackrivertactical.com/WP/BR...CAR-p194049554

I noticed you have suggested 2 different buffers depending if it is suppressed or unsuppressed.

I really didn’t want to worry about changing buffers if I choose to run unsuppressed. I understand there is no perfect one size fits all. What will run both suppressed and unsuppressed reliably?

[gaijin]

I suppressed an H2 should run fine.

[MegademiC]

I got a brt tube and run a sprinco blue and h2. (Bcm 11.5")

Runs with and without the can, no gas to face unless I shoot 5-6 rounds at once, then I get a little. It's smoother than my centurion 14.5" mid with h1 and Wolff xtrapower.

[17K]

I’d do what Clint recommended.

I think BCM’s 11.5s are way overgassed without a can.

[dan1612]

A5H2 Springco green runs everything. Can or not.

[Clint]

If you want to run just one buffer, go with the H buffer.

It will be reliable suppressed, but will cycle faster than normal.

Bumping up the buffer weight when suppressed is optional and will help slow down the cyclic rate.

I noticed you have suggested 2 different buffers depending if it is suppressed or unsuppressed.

I really didn’t want to worry about changing buffers if I choose to run unsuppressed. I understand there is no perfect one size fits all. What will run both suppressed and unsuppressed reliably?

[ggammell]

I would suggest shooting it under each condition then seeing what it’s like and what needs to be adjusted. A carbine spring and H2 buffer might be it. Or it might need some tweaking with a new tube, block, etc.