Re: AR10 300 SAUM Deer
if you want a magnum caliber, you will need a complete upper and lower. You can watch the gun adds and occasionally find a DPMS 300 saum for sale. Otherwise, you will need to ask the smith to build a complete rifle. I already had the complete rifle from DPMS, so I just got the upper. The DPMS complete rifle shot well with the 20" barrel, but I wanted the 24" barrel, plus the brake. The rifle in the picture kicks like a 223 Rem.