ar15 vs ar10 platform

[deer hunter1110]

Have ar15 in 223 looking in to new cal. ar. From what I can find in ar15 the cal. are 458.socom 50 beowolf 300 wisper 243 wssm 358 wssm 450 bushmaster.And ar10 243 win 260 rem 7mm-08 284 win 35 rem 300 savage 257 roberts 358 win 270 wsm 300 wsm 325 wsm 450 marlin.Does any one know of others in either platform and who makes the uppers or a custom ar upper maker or supplier to order the parts to make my own.I am sure I missed some thought you guy could fill me in thanks

 

[figley]

I wish there was a website that was all about AR-15's

AR Variants - AR15.COM

 

[top hat 45]

go to 6mmar.com

they have the 6mmar which is a necked down 6.5 grendel

both are for an ar15 platform

 

[IndianaDave]

Just for the heck of it, check out 6.8 SPC II. A number of builders re-did the original anemic 6.8 SAAMI and ended up with some decent performance. AR-15 platform with 1700 ft/lbs ME out of a 16 inch barrel.

Home of the 6.8 SPC - 68forums.com