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1/31/2014 8:14:11 AM EDT
Guys I just built a 9inch aac 300bo AR pistol.  Im trying to find out which buffer spring and buffer I need to run.  According to AAC website it says to use a standard GI buffer spring and a H2 buffer.  Im finding out though that the H2 buffers have a weight range to them....which would I need for mine?  Im primarliy going to run subsonic and suppressed but I want it to be able to run super sonic and unsupressed.
1/31/2014 8:31:29 AM EDT
[#1]
Do yourself a favor and purchase the KAK Sig Brace compatible buffer tube and buffer kit, because at some point you'll decide that you need the Sig Brace. If you want to be fancy like me you can use a Spikes H2 buffer instead of the standard buffer (either works fine with the Blackout).

KAK tube kit
1/31/2014 8:32:08 AM EDT
[#2]
I don't believe there is supposed to be variation with H2s, H3, etc. Some companies like Spikes has unique weights that place them in-between H2, or H3.

But really, a standard H2 from any quality shop will work.
1/31/2014 8:35:21 AM EDT
[#3]
Quote History
Quoted:
Do yourself a favor and purchase the KAK Sig Brace compatible buffer tube and buffer kit, because at some point you'll decide that you need the Sig Brace. If you want to be fancy like me you can use a Spikes H2 buffer instead of the standard buffer (either works fine with the Blackout).

KAK tube kit
View Quote


I already installed the KAK tube....but I didnt get the spring or buffer from them as they were out of stock.

2/1/2014 4:12:51 AM EDT
[#4]
Standard H2 or Spikes ST2...both work just fine.
2/1/2014 4:45:57 AM EDT
[#5]
Quote History
Quoted:
Standard H2 or Spikes ST2...both work just fine.
View Quote


this.  Many run the Spikes T2 because it is slightly lighter.  I have heard that subs and supers can run with both suppressed/unsuppressed.  Depends on the build and the ammo though.
2/4/2014 11:32:48 AM EDT
[#6]
I have a Spikes ST2 with a 9inch AAC 300 BO AR upper in a standard mil-spec buffer tube and spring.  I have shot 500 rds with no issues.
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