LARGE PIN (.172 Ø) – Colt is the only AR brand to produce both small and large diameter pins in their triggers. Colt AR-15 rifles produced between 1991 and late 2009 commonly take a LARGE PIN.
SMALL PIN (.154 Ø) – If your AR rifle is NOT a Colt or your Colt was produced before 1991 or after 2009 it will take a SMALL PIN.
M&P 15-22 COMPOSITE PIN – The Smith & Wesson® M&P® 15-22 or any wider than standard receiver will use a SMALL PIN diameter but requires a longer pin length and will take an M&P 15-22 COMPOSITE PIN.
CMC Triggers offer all versions of their Drop-in AR Trigger in SMALL PIN, LARGE PIN, and M&P 15-22 COMPOSITE PIN. If you are still unsure of the pin diameter needed for your rifle you can take a measurement by pressing a pin far enough out of the receiver to measure its diameter, .172 Ø for LARGE and 154 Ø for SMALL.
CMC’s innovative, self-contained and easy-to-install AR-15 trigger groups, have been completely re-tooled to maximize production capacities, incorporate new design enhancements and reduce cost. CMC’s AR-15 trigger groups have always yielded exceptional trigger pull dynamics for our tens of thousands of satisfied customers. However, keeping up with high demand has been difficult since the introduction. CMC is confident the new production tooling and setup, incorporating the most advanced methods available, will not only yield the highest quality but will also keep the supply lines full so every AR-15 shooter who places the highest demands on quality, function, and reliability, will no longer have extensive lead times for obtaining these innovative trigger groups. And thanks to our multi-patented designs, a fine match grade trigger pull is now an extremely simple upgrade to implement. Install the fully self-contained, ready-to-go trigger group, safety check, and it’s done.
*DO NOT OVER TIGHTEN!!
FEATURES
- 2 posts, 4 Screws, 2 wrenches
- Positive retention of trigger assembly
- Assembly tools provided with kit
- Easy to install or remove
- Improved reliability of trigger assembly
- No sharp protrusions to interfere with hand or glove
WARNING: WARNING: Cancer and Reproductive Harm - 
