20" build

[9mmD]

Considering a new build with 20" upper. I am looking at RRA coyote/ or varmit A4/ or a predator pursuit. http://www.rockriverarms.com/index.cfm?fuseaction=category.display&category_ID=200
Can someone tell me the difference between these. They look the same.
Any thoughts?
Also is 556 a waste w/ this? Should i think about going larger cal?
Mainly small game/paper puncher out to 300-500 yrds

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[Dan-Dee Sales Inc]

varmint has a heavy bull barrel.
I have a predator and love it. 20" NM barrel that is not as heavy as the varmint.

 

[krawl]

Looks like Dan-Dee covered it. If you haven't handled one do so though. I personally liked my heavy barrel upper when I had it, but makes for a completely different gun then an m4gery. Much heavier, but still fun to shoot!

 

[bmgm37]

Just researched the same thing and went with the Varmint upper as there is only a 1 lb difference between the two uppers.

 

[9mmD]

Saw the other thread about this. seem others have the same ???. Kinda leaning towards the RRA predator but from that other site. Was like 75.00 cheaper than rra factory. Now just have to figure out what ammo to use, but that can wait til it get the upper.

 

[RockKrawler]

Just finished up a 20" Bushy V Match HB SS upper on a Spikes lower w/Ace stock,hope to get the scope dialed in this weekend.
Also have a Wilson 1-8 20" HB i am assembling on another rifle,waiting on a few small parts to come in.
Both of these are being built as Varmint rifles.