A SIMPLE KEY FOR COLT 16 INCH UPPER UNVEILED

LE6940P works by using Colt’s Articulating Link Piston (ALP). Rather than striking the bolt copyright immediately with no play, ALP makes it possible for operating rod to move a bit, correcting for downward strain on bolt and helping to eliminate copyright tilt.I wasn't able to find something concerning this, can you backlink a supply? I did find