Gun shops around me still full of stuff.
I have used Anderson, spikes, aero precision, del ton, Barnes precision, PSA, even a billet one, etc. lowers in several builds.
Nothing has been a problem except a single shot lower from FL, with a poorly tapped pistol grip hole. (Used for a large caliber bolt fed upper build.)
The only problem lower I have, in terms of compatibility, is the Colt SP1.
I have used chrome lined, phosphate, SS, and nitride barrels.
The only problem barrel I have is the bore or twist rate is off in a 5.45 I built and it keyholes.
Edit
I even used one of those polymer lowers a while back for an experiment in a lightweight built. It was too front heavy. It ended up with a .22 upper.
Last edited by ramairthree; 03-29-18 at 00:08.
“Where weapons may not be carried, it is well to carry weapons.”
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