by thatguy » Sat Nov 07, 2009 10:04 pm
You are correct 5.56 can shoot .223 but not the other way around..
I believe most major mfg's (bushmaster, rra, colt, dpms) only chamber for 5.56.. There are a few companies that chamber in other calibers though..
You may even want to consider a 7.62x39 (russian 308 - same as AK) - ammo is very cheap compared to 5.56 and it can be used for varminting I believe..
Even cheaper than 5.56/223/7.72x39 to shoot would be a .22 dedicated upper (since a conversion wont shoot very well out of a .45 barrel LOL)..
good luck
brian
If you are on Facebook, check out the 450 Bushmaster "Thumper" group I created.. We are always looking for new members and don't forget to share any pictures you have...