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Talk to me about lowers
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<blockquote data-quote="lasher" data-source="post: 2946811" data-attributes="member: 40522"><p>I don't know who machines PSA's lowers now. the foundry mark is the Square now, used to be the A . sorry about the typo, Mega is the 7075, many of the billet lowers are the 6061 aluminum which gets the bad rap for being weaker, i think juggernaut tactical uses 6061 as do some other shops </p><p></p><p>wonder if the old A foundry mark on the PSA is for Aero. here's an incomplete list of foundry marks, the square isn't included. i had some new armalite carry handles that had the square foundry mark like i found on the new PSA upper, i have one PSA upper in 6.8 that is the A mark. all the usgi take off handles i've had recently have been the cardinal mark</p><p></p><p>A (splintered) = Anchor Harvey Aluminum</p><p>AF = Alcoa Forge</p><p>C AF = Colt Alco Forge</p><p>C MB = Colt / Mueller Brass</p><p>Cardinal (stylized) = Cardinal Forge</p><p>CH = Colt Harvey Aluminum</p><p>CK = Colt / Kaiser Aluminum</p><p>Circle/Crooshairs w/"AR" = ArmaLite</p><p>CM = Colt / Martin Marietta</p><p>D (stylized) = Diemaco</p><p>DK = Diemaco / Kaiser Aluminum</p><p>E = Emco</p><p>EK = EMCO/Kaiser</p><p>E MB = EMCO/Mueller Brass</p><p>F keyhole = FNMI / Cerro Forge</p><p>FA = FNMI / Anchor Harvey</p><p>FK = FNMI / Kaiser Aluminum</p><p>FM = FN/Martin Marietta</p><p>FMB = FNMI / Mueller Brass</p><p>Keyhole = Cerro Forge</p><p>L = Lewis Machine & Tool</p><p>LK = LAR / Kaiser Aluminum</p><p>LM = LAR / Martin Marietta</p><p>M (under diamond) = Mueller Industries</p><p>PA = Capco / Anchor Harvey</p><p>PM = Capco / Martin Marietta</p></blockquote><p></p>
[QUOTE="lasher, post: 2946811, member: 40522"] I don't know who machines PSA's lowers now. the foundry mark is the Square now, used to be the A . sorry about the typo, Mega is the 7075, many of the billet lowers are the 6061 aluminum which gets the bad rap for being weaker, i think juggernaut tactical uses 6061 as do some other shops wonder if the old A foundry mark on the PSA is for Aero. here's an incomplete list of foundry marks, the square isn't included. i had some new armalite carry handles that had the square foundry mark like i found on the new PSA upper, i have one PSA upper in 6.8 that is the A mark. all the usgi take off handles i've had recently have been the cardinal mark A (splintered) = Anchor Harvey Aluminum AF = Alcoa Forge C AF = Colt Alco Forge C MB = Colt / Mueller Brass Cardinal (stylized) = Cardinal Forge CH = Colt Harvey Aluminum CK = Colt / Kaiser Aluminum Circle/Crooshairs w/"AR" = ArmaLite CM = Colt / Martin Marietta D (stylized) = Diemaco DK = Diemaco / Kaiser Aluminum E = Emco EK = EMCO/Kaiser E MB = EMCO/Mueller Brass F keyhole = FNMI / Cerro Forge FA = FNMI / Anchor Harvey FK = FNMI / Kaiser Aluminum FM = FN/Martin Marietta FMB = FNMI / Mueller Brass Keyhole = Cerro Forge L = Lewis Machine & Tool LK = LAR / Kaiser Aluminum LM = LAR / Martin Marietta M (under diamond) = Mueller Industries PA = Capco / Anchor Harvey PM = Capco / Martin Marietta [/QUOTE]
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