Colt’s manufacturing has made several versions of their lower receivers and you must determine which one you have before purchasing/installing the JPFCP-EZ kit.
First, measure the pins in your Colt lower to determine if they are .154 or the .169 in diameter. Only .169 pins will be compatible with the JPFCP-2EZ kit. Use the JPFCP-1EZ kit for a receiver with .154 pins.
Second, verify that your lower receiver has the machined-in wall feature used in newer Colts and not the pinned-in full auto sear block common to older Colt models. If your receiver has the pinned-in block, the JP EZ Trigger will not be compatible (see below). You must use the original JP fire control package (JPFCP-2) and fit the trigger/safety relationship or send your lower to JP for our in-house installation. We offer the JPFCP kit installed and returned shipped for $220 with a one-week turn around.
We are constantly reevaluating our products from both the safety and reliability standpoint, and it has come to our attention that the thread locker product used to secure the button-head screws in the JP Anti-Walk Pins installed in JP assembled rifles and lowers may not be properly curing. This could allow the retaining screws to vibrate out of the pins during live fi...
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