My Toy
Ultimate Member
My question is in the title. Are there any concerns with respect to ATF or other law enforcement entities by replacing a bolt carrier group in an AR-15 with an M-16 bolt carrier group?
In order to avoid violations of the NFA, M16 hammers, triggers, disconnectors, selectors and bolt carriers should not be used in assembly of AR–15 type semiautomatic rifles, unless the M16 parts have been modified to AR–15 Model SP1 configuration. Any AR–15 type rifles which have been assembled with M16 internal components should have those parts removed and replaced with AR–15 Model SP1 type parts which are available commercially.
The Commercial Bolt Carrier is machined away so that it cannot contact the AUTO SEAR. You cannot install an Auto Sear in the lower without drilling a hole through both sides. By drilling the hole you just became a Felon.
There are RDIAS "Registered Drop In Auto Sear" available for purchase for ~$8 to 10K that were registered prior to 1985.
The Commercial Bolt Carrier is machined away so that it cannot contact the AUTO SEAR. You cannot install an Auto Sear in the lower without drilling a hole through both sides. By drilling the hole you just became a Felon.
There are RDIAS "Registered Drop In Auto Sear" available for purchase for ~$8 to 10K that were registered prior to 1985.
I'll take two.
Auto sears start at about twice those prices.
Lightning links are at about $12,000 now.
Short answer: everybody uses a "Full Auto" BCG because it's slightly heavier, or so we've been told. Don't worry about it.