Major Options - Cast, Forged, Polymer (Forged
are best, cast are not high quality) Various styles, Most are about the
same quality
Things to consider about the AR15 Lower
Receiver
Complete Lower
Serialized
lower receiver built up with Trigger Parts, stock
assembly, pistol grips, lower parts kit. Sometimes
assembled, sometimes purchased as a kit. This is
the only part regulated by the BATFE. No barrel
or top end of the AR15 rifle
Stripped Lower
Serialized lower
receiver made from one solid piece of material
(aluminum). No internal parts. This is the only
part regulated by the BATFE
Lower
Parts Kit
Sold as a kit, with all the parts to
assemble a stripped lower. Also makes a good spare
parts kit for a complete rifle. Includes; trigger,
pins, springs, standard pistol grip
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