AR9

GA Firing Line

karlvv

The LEGEND
Kalash Klub
Lifetime Supporter
Apr 3, 2015
3,784
12,415
113
Harlem, GA
Zip code
30814
What's the best buffer and spring combo for AR9's? Asking for a friend. No reallly.
 

Laufen

Beloved flaming retard
Lifetime Supporter
Mar 23, 2015
7,927
6,129
113
I85
Zip code
30030
What's the best buffer and spring combo for AR9's? Asking for a friend. No reallly.
Did a build years ago and used a H Buffer 5.4oz I think. I think the spring was a flat .308 spring. This info might not be 100% reliable, my brain is tired.
 
  • Like
Reactions: chance

SouthernSlammed

Gingerbeard Operator
Lifetime Supporter
Aug 29, 2015
3,107
2,616
113
Fapville
Zip code
31061
going with 7.7oz buffer in mine. the spring is one that came with Kak Blade. will see how it runs and may go with a 308 spring.
 

Rwjeter

Space Force General Freeze.
Kalash Klub
Lifetime Supporter
Nov 16, 2016
5,354
10,815
113
Temple
Zip code
30179
I used an AR10 spring with the KAK extended 9mm buffer. It’s heavier, plus it being longer doesn’t allow it to go as far back which could build up too much momentum and damage your bolt catch on the return.
 
  • Like
Reactions: Laufen

Leshaire

Weekend Warrior
Mar 27, 2015
3,343
1,994
113
Acworth
Zip code
30102
Its weird that nobody has figured out the perfect setup.
There isnt a perfect setup since barrel lengths, gas systems, cans/no-can variables exist. This is the "best" that I know of, and notice its adjustable. Im running a 4", gas blowback, canned AR 9 with the buffer at 11.5oz and the extended wolf xp spring.

http://heavybuffers.com/9qt.html

Here it is next to the PSA 9mm specific setup.

43a8a4b974700b015f8ebf0589e38cda.jpg
9f3521ca8e63cec834a7e4a4f8bb113f.jpg
 
  • Like
Reactions: Laufen and karlvv

Allsmiles

Frontiersman
Site Supporter
Kalash Klub
Mar 15, 2017
335
517
93
Golfcart City, GA
Zip code
30269
8oz 9mm buffer and a 308 carbine spring in mine without any issues using a 16" barrel. Keeps recoil down and gas out of your face shooting suppressed. Runs like a top and love all ammo from 115 to 147subs.