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Posted: 10/15/2004 4:36:46 PM EST
Looking for a standard 20 inch A4 upper from RB Precision, M&A Parts and Model 1 parts. Prices are about the same. Rb says they use a wilson chrome moly 1:9 or wilson air gauge stainless 1:8. barrel. M & A Parts says they use a wilson chrome moly heavy match grade barrel 1:9 or 1:7. Model 1 Parts says they use a heavy chrome moly or stainless steel in 1:9 or 1:8. Ok guys if i want to shoot a variety of ammo which one of these uppers would you choose for accuracy and reliability. THis is driving me crazy.I cant make up my mind and i cant buy all three. I have a complete Rock River lower waiting for an upper....
Link Posted: 10/15/2004 4:55:20 PM EST
I'll give the standard ARFCOM response, buy both and post pics.
Link Posted: 10/16/2004 11:05:38 AM EST
RB sells RRA , so keep it all Rock River. I think the bolt and carrier will be better quality
Link Posted: 10/16/2004 2:40:40 PM EST
The 1:7 barrel from M&A Parts is chrome lined and purportedly USGI spec. I've been thinking about one of the kits and would sure like to hear from anyone who's tried one.
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