[url]http://www.ar15.com/forums/topic.html?b=3&f=14&t=164977[/url]
[url]http://www.ar15.com/forums/topic.html?b=3&f=12&t=164990[/url]
No matter whose equipment you buy, their carrier bottom will either be std M16,, or AR-15, but cut on bottom for AR semi bolt will have varying amounts of material by different manufacturer---Old Colt used to be even with lug, I have a DPMS that goes forward of the lug, and a gunshow carrier that has slight more material.... No matter whose part you use, you will be bound to machine slightly to get your clearance.
The pic here is a 9mm bolt--"Colt" pattern.
The area inside the green lines would need to be removed, so the bolts' underside would look like the SP-1 Colt semi carriers' bottom to operate the LL.
Pic not legible like it was in "paint"....
[img]http://www.imagestation.com/picture/sraid69/pa81fb565814805dbc811816315e3d295/fbb5c54a.jpg[/img]