You have two option and pick one. One option is fixed magazine with you will then be allowed to have all the features you want. The other option, non-fix magazine, is also known as “featureless” rifles which means you cannot have any of the cool looking attachments.
For any rifles that are not semi-auto, you can add as many features as you want.
YOU HAVE 2 OPTIONS
OPTION 1: FIX MAGAZINE
OPTION 2: NOT FIX MAGAZINE
For purposes of this section, “fixed magazine” means an ammunition feeding device contained in, or permanently attached to, a firearm in such a manner that the device cannot be removed without disassembly of the firearm action.
OPTION ONE – FIXED MAGAZINE
OPTION TWO – NON-FIX MAGAZINE
OVERALL LENGTH MUST BE OVER 30 INCHES
You semi-auto rifle must be 30 inches or longer. Measured from the end of the buffer tube to the other end of the barrel.
It is considered an assault weapon is less than 30 inches.
Can you transfer online purchase of an AR 15 lower receiver. If you do, do you have certain online store you work with?
I think I’ve already responded to your question but YES, I do sell AERO Precision lowers. https://tacticcal.com/