I'm pretty sure if it's a registered LL it's the lightning link that is the registered machine gun making it legal. RLL and RDIAS are different from HK9X registered packs. the RDIAS and RLL have the manufacturer and serial numbers registered to ATF and drop into the lower of the host weapon. only problem with a RLL is that he'll need to install M16 FCG into the MR556 and modify the FCG to get selective fire otherwise the fire modes will go from safe to full... no semi. remove the LL and the gun is now has m16 FCG illegally in them so if he wanted to remove the LL he needs to remove the fcg too. like UMP said the Bolt carrier need to be milled to SP1 specs. more info can be found below
LOL, that was some funny ****.
Its not that easy, simply installing a 3 position or 4 position selector will still make the weapon full auto only with a LL, its the way the LL pulls the disconnector. The m16 selector has to be modified to have a notch cut in it to prevent the LL from engaging in the semi position. Because of the design i dont think burst works for the LL
M60 Joe now has a selector setup (safe, semi, full), that uses Ar15 trigger parts so once LL is removed no auto parts left. And it still works just fires semi in full position with link removed. he set up my Rock River gun that way and it works perfect.
It's only illegal to modify the receiver to function with factory original f/a parts. Machine gun BAN applies to the serial numbered receiver - in the case of AR's that's the lower, and using factory parts would require drilling a hole in the receiver. "Conversion" sears are just that, a conversion. While they function the same way, they need neither that hole drilled nor require you to modify the receiver itself in any way.
Yea, I probably won't like that look. I need to look into flash hiders more. I mainly just want my barrel cut and rethread at 14.5".
if you have your heart set on an A2 birdcage you could always go with an extended birdcage that is made to be permanently attached to a 14.5 to be 16 inches to be legal.
Another option would be to have your barrel cut to 14.7 then using a standard crush washer and the A2 flash hider, you should be just above 16 inches. Make sure the barel is measured prior to drilling, pinning and welding just to make sure. Looks real close to the 14.5 barrel look, so close that most people can't tell, but it's legal.
