6.8 question

[nstuyt]

Im slowly building up a lower for a 6.8. I've always had good luck with riflegear and thats usually who I order my parts from. My question is do I need to do anything different such as a heavier buffer or spring?

[Geo]

No.

[THT]

Barrel, bolt and magazine are the only differences. Heck, I've been told by a customer that a 5.56 mag can be modified to work with 6.8

[nstuyt]

Ya ive heard that the mags will work also just as long a their not loaded real tight. Not a risk that im willing to take though.

[nicoroshi]

Barrel, bolt and magazine are the only differences. Heck, I've been told by a customer that a 5.56 mag can be modified to work with 6.8

For about 3-4 rounds yes but for a full mag No.
The 6.8SPC has a larger diameter cartridge so will not work reliably in a 5.56 magazine (i.e. interior width of the magazines is different).
I once had a dream of converting Pmags for use with my 6.8 SPC rifle. Sorry, not gonna happen. Feed lips,and interior width are different.

[sholling]

Nothing different for the lower except the mags. I built mine using a DoubleStar stripped lower, G&R LPK, Geissele DMR Trigger group, Vltor EMOD, and an AR15 Performance MK68 Recon upper. I'm using CProducts 10rd 6.8 SPC mags.

[joelogic]

I talk a lot of crap about the 6.8 being too expensive and even reloading being too expensive but today I shot 3, 5 shoot, 1" groups at 100 yds today. It is a great round.

[sholling]

I talk a lot of crap about the 6.8 being too expensive and even reloading being too expensive but today I shot 3, 5 shoot, 1" groups at 100 yds today. It is a great round.

My feeling is that I can do 90% of my AR15 practice with a 5.56 that's nearly identical (BCM middy) to my 6.8 SPC. That leaves the high buck rounds for self defense and hunting.