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Posted: 11/19/2003 9:05:39 PM EDT
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I have a few questions about a rifle I am about to take in trade. The rifle has a RRA lower with a Bushmaster A2 upper, 20-inch A2 profile chrome lined barrel 1/7 twist with a KKF fake muzzle brake. 1. I'd like to change out the A2 upper for a Bushmaster flat top with a Bushmaster carry handle- will there be any problems with sight alignment? 2. I usually shoot 55 grain ammo with a 1/9 barrel, will I have any problems with the different barrel twist rate? Thanks in advance for any help ya’ll can provide. |
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There is no evidence that spinning M193 Ball (55gr) in a 1/7 twist barrel does anything harmful to the bullet or its accuracy. If you're going to shoot iron sights stick with what you have. Only reason to fit a flat top receiver is to put a telescope on it. KISS. -- Chuck |
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