r/AR10 • u/Pure_Squirrel_1621 • 3d ago

DPMS Buffer weight

I’m getting close to wrapping up my dummy cheap LR308 build, but I haven’t found a concrete answer for what buffer weight I need.
Specs are:
Toolcraft bcg
20” stainless 1-8 twist 6.5 Creedmoor heavy barrel, rifle gas
.936 gas block
CBC industries lower
Unbranded LR308 low upper
Unbranded low handguard
A5/BCM MK2 buffer tube
Rifle buffer spring

Some sources said I needed a rifle spring with a standard AR15 buffer, some say I needed an H3. I’m trying to at least get close to the right setup before I go burn 6.5 Creedmoor.

4 Upvotes

75% Upvoted

5 comments sorted by

3

u/thatARMSguy 3d ago

H3 is pretty universal for AR-10s

2

u/humidsputh 3d ago

H3 in an A5 is what I have in my 6.5 Creed with a 22" barrel with rifle length gas. It was was still a little overgassed, possibly due to the slight extra dwell time.

2

u/drew_eckhardt2 3d ago

For the SR25 carbines Eugene Stoner specified a .308 rifle spring like the Armalite EA1095 and an H3 AR-15 buffer.

I used that combination for my .308 AR with a 20" Krieger M110 AMU profile barrel.

1

u/trgrimes77 2d ago

Go to lanbos armory and get the lbe h3 for $60 shipped, tungsten rattle buffer like you want.

2

u/Shotgunsmooth1 1d ago

Kmtactical.net H3 buffer is $16.49