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12/6/2019 7:27:02 PM
Posted: 2/23/2007 2:22:29 PM EST
2 years ago I bought a RRA lower in the hopes of building my first ar15. Well, other things came up and that never happened. Anyway, I decided that it had been sitting on my shelf for long enough, and I’m finally going to build my gun. I’ve pretty much picked out all the parts I need, I think, but I’m stuck on what barrel and twist rate to get. 1:9 or 1:7

Also, will these parts work together ok, and am I missing anything really important? By the way, I have no clue on what I’m doing.


RRA Forged A4 Upper Receiver Assembly
LMT Bolt Carrier Group
7.0" LaRue Tactical Handguard
MagPul Gen 2 trigger guard
Phantom - 5C2 flash hider
Magpul Ranger floor plates
Magpul CTR Stock
Milspec Receiver Extension (Buffer Tube)
H Carbine Buffer
Carbine Action Spring
Magpul MIAD Grip – BASIC
TangoDown Vertical Grip - Black
Magpul CTR Rubber Buttpad BLACK
Link Posted: 2/23/2007 3:09:46 PM EST
A gas tube and block will help keep it from being a One-Shooter As for barrel twist, you will probably not tell the difference unless you go real light on the bullet. Think 1:7 50 to 75 grain and 1:9 as 40 to 70 grain. So, more than likely, you will be shooting stuff in the range that either work well. Have fun.
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