Quote:
Originally Posted by hunting909
I was thinking that the fact that they are making their .22's with aluminum uppers and lowers may make them more accurate than the 15-22 ? Just wondering. Thanks!
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What makes the RRA item more accurate is the aluminium upper, not the lower. I've used polymer lowers on accurate AR15s. I like them.
That a S&W 15-22 has a polymer lower doesn't mean that it will be directly comparable to an actual AR in 22lr. Your S&W uses an excellent magazine system and has a working last round bolt hold open. The RRA has neither attribute unless you modify it.
Your S&W has a polymer upper receiver into which the barrel is fit. This means that the barrel and optic are connected by flexible polymer. That isn't a formula for very good accuracy. Shot from a rest, people can get good groups from the S&W. Sling up or put any sort of odd pressure into it and the POI necessarily wanders.
The dominant pattern for ARs in 22lr currently seems to be the CMMG pattern BCG and barrel. (This pattern also doesn't use S&W magazines or have a LRBHO unless modified for those, but the parts used for those modifications are available and well tested.) The advantage of using the dominant pattern is that it isn't only made by CMMG. RRA seems to be using something else, and I don't know if anyone else makes parts for it, or if it is compatible with anyone's bolt hold open systems.
RRA aren't the only non-CMMG pattern product. Nordic makes or made several different generations of 22lr upper receivers (for an AR, not for a 15-22), 2A Armament makes a BCG and Barrel, and Tactical Solutions makes complete uppers, and there is an air rifle outfit that makes its own 22lr rifle and magazines, Tippmann. RRA seems less expensive than those options, but has the disadvantage of apparently not existing in the retail market yet.