thenorsepole Posted December 12, 2014 Report Share Posted December 12, 2014 (edited) Just started the process of assembling an AR in 308. As for why? The Readers Digest version is because I "need" one of course. I have lots of AR's in 5.56, 300Blk and even .50Beo, but am looking to stretch my shooting legs a bit. Truth be told, I bought a Burris Eliminator III for a 20" BCM and realized it's too much scope for 5.56 so let's build a rifle around the scope hence the .308 project. Starting with a CMMG MK3 18" upper assembly and am eyeing an Aero complete lower. I will replace the trigger with an SSA I have laying around, the pistol grip with a BCM MOD 1, the charging handle with a BCM Mod 4. The question I have centers around the buffer tube. I would like to go with either a UBR or PRS. Springs and buffers are specific to .308 but what about the tube itself? Can I use a rifle length (or carbine length for that matter) buffer tube from a 5.56? I have googled and searched several sites but never found a definitive yay or nay on this. Edited December 12, 2014 by thenorsepole Quote Link to comment Share on other sites More sharing options...
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