Wanting to start a Build ar 15

[horsemen61]

Ok guys I am wanting to build an ar 15 in 6.8 spc 2 and I have a question here it is don't they just use a standard lower for 223 or do you have to have a different lower

 

[kyhunter]

Same lower is used. Lower simply needs to be marked multi-caliber. Hope this helped

 

[briansmithwins]

Technically speaking, the lower dosen't _have_ to be marked 'multi'.

I agree it's a good idea to use a lower marked 6.8 or multi to prevent confusion, but it isn't like you'd be breaking a law or something.

BSW

 

[Krusty783]

Ok guys I am wanting to build an ar 15 in 6.8 spc 2 and I have a question here it is don't they just use a standard lower for 223 or do you have to have a different lower

Same lower.

5.56, 6.8, .300 Blackout & .300 Whisper all use "standard"/multi-cal 5.56 lowers. You just need a different upper and magazines.

 

[adelbridge]

I dont want to rain on your parade but check price and availability on 6.8 ammo. I built a 6.8 gun and got sick of paying $1 per round pre panic and sold it to build a 7.62X39 also off the standard AR-15 lower. 7.62X39 is about .30 a round, available everywhere (world wide) and superior balistics vs 6.8.

 

[gotigers]

Yeah check 6.8 cost. If it will be your only ar, it will be expensive to plink with. You could always have another upper, like a 22, 223, etc to save money plinking and use the 6.8 for hunting or whatever.

AR 15 lowers take many calibers. Many are mentioned above and the 6.5 grendel.