oh and I just remembered, even though it's been discontinued, smith and wesson used to make upper halves in 5.45. CDNN had them for a long time fore a fairly decent price but I didn't jump on the 5.45 train until S&W gave up on them, you may find them around gunchoker or armslist if you look hard enough.
all guns lost in a tragic smelting accident.
I never said half the crap people said I did-Albert Einstein
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Bean counters told me I couldn't fire a man for being in a wheelchair, did it anyway. Ramps are expensive.-Cave Johnson.