AR15 Lightning Link
Material: Stainless steel
this only drops into a Colt SP-1 and a handful of other, early civilian-made AR-15s such as Bushmaster, Sendra, Essential Arms, and most PWA pre-ban lower receivers. After 1989, Colt added what’s known as a “High Shelf” in their lower receivers to prevent installation of this. These lowers can work if the shelf is milled away.
Many modern lowers have a “Low Shelf,” but they may not be rounded in the rear properly to accommodate this. Again, milling will be required to make it fit.
this only works with Colt SP-1 bolt carriers. If you have a commercial bolt carrier, or even an M-16 carrier, these will need to be milled to work with this.
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