The Mark IV 22/45 is available now. http://www.ruger.com/products/markIV...ets/43909.html It's not Mass approved yet.
the Mk4 looks nice. once they release the 22/45 version i will be in the market. my only concern at this time is whether the upper-lower lockup stays snug over time. also it's sort of easy to inadvertently hit the unlock button on the rear of the pistol. not sure if this could be issue while firing. both will have to see.
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agreed. the Mk3 in native form is simply unacceptable. the mags do not drop free. the LCI is retarded, etc. The tandemkross kit to replace both the mag disconnect and LCI really turns it into a much more enjoyable range gun. such upgrades really shouldn't be necessary, but at least they're relatively easy to install and well machine parts.