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Posted: 9/15/2021 7:36:56 PM EDT
Building a 11.5" barrel AR & not sure what buffer & spring to go with in your standard adj 6 pos buffer tube.

Also, plan to build a 7.5" barrel AR as well. Anyone have suggestions on what to go with there?
Link Posted: 9/16/2021 8:08:01 AM EDT
If you already have a standard carbine buffer tube run a H2 buffer and a sprinco spring. sprinco has a guide on choosing.

https://www.sprinco.com/ar-buffer.html

I ran an H2 and a white Sprinco in my 10.5 carbine before I changed over to Vltor parts.

go with Vltor if you don't yet have a buffer tube. Sprinco green rifle length spring and H2 Vltor buffer.
Link Posted: 9/16/2021 2:28:30 PM EDT
I run an H3 with a standard spring. Ballistic Advantage 11.5" gov profile barrel.

Attachment Attached File

Link Posted: 9/16/2021 4:07:50 PM EDT
I run a red Sprinco with a H2 in a 4.5" and 6.5" 556 and both run great with that combo.  I think having barrel/gas-block from the same mfg that are meant to be run together makes a big difference.  I've run both of these uppers with std spring and buffer, and all kinds of combinations of weights (spring and buffer) and they have always run fine.  I just like the recoil impulse and the ejection pattern with the heavier weights better.

ymmv

Link Posted: 9/19/2021 6:30:06 PM EDT
[Last Edit: 9/19/2021 6:32:38 PM EDT by Swordfish92]
The standard milspec spring BCM sells, all mine run the same with an H / H2 / H3 buffer… but I haven’t fucked with the gas at all.

Gassy? Definitely. Reliable? Completely.
Link Posted: 9/19/2021 8:12:19 PM EDT
I run a Sprinco Blue and an H2 in my Colt 6933
Link Posted: 9/23/2021 6:11:06 AM EDT
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By ELPerdido:
I run a Sprinco Blue and an H2 in my Colt 6933
View Quote


I too am a fan of the SpringCo Blue and H2 buffer setup.  I also use SpringCo Red and White with Carbine, H, and H1 buffers depending on how gassy the rifle is.  

Link Posted: 9/23/2021 12:23:01 PM EDT
u run an h3 with a chrome silicon spring from damage industries
Link Posted: 9/24/2021 2:31:44 AM EDT
H2 and Sprinco White.  Tamed my seriously overgassed 10.5 down nicely.
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