I have a Colt Sporter 20" with a 1-7 twist barrel and a XM177 with a 1-9 twist.  I have an extra Bushmaster lower and bolt (both complete) that I want to use to build a third rifle.  I have been looking at maybe a Varmint kit.  Don't know much about their accuracy and/or their advantages but they have a different profile from myj other rifles.  Any suggestions or info and what to do with the extra lower?  I am wide open to ideas but don't want to break the bank.  I did that today buying ammo!hinking.gifTHANX!