Click to see full view
CMMG
Overview
The CMMG AR-15 HD Pivot and Takedown Pin Parts Kit is designed to provide a reliable and sturdy solution for securing your AR-15 upper and lower receivers. Made from steel, this pin set is essential for maintaining the structural integrity of your firearm during assembly and disassembly. This kit is frequently found in builds utilizing a mid-length gas system chambered in 5.56 NATO, making it a solid choice for those configurations.
Prices checked
CMMG AR-15 HD Pivot and Takedown Pin Parts KIT - 55AFF3B is the most added takedown pin on GunPartPicker so far in October 2026, ahead of the Timber Creek Outdoors AR-15 Takedown Pin Set - Red, with about 32% of all takedown pins added to builds. That's its 6th straight month at #1. Builds with this takedown pin are mostly chambered in 5.56 NATO (72%, then .223 Wylde 9%), split between mid-length (54%) and carbine-length (27%) gas systems, and mostly AR-15 (94%).
Availability is good: it was in stock at one retailer or another nearly every day in September 2026, and today 9 of the 11 retailers we track have it in stock. The best price drifted down from $18.85 to $14.99 over September 2026 without a real sale. Buying today, the lowest price is $16.55 at KY Gun Company, above September's low of $14.99, so a better deal may come back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
We ranked every takedown pin by how often it shows up in real builds on GunPartPicker.
Read the guide: AR-15 Takedown Pin Guide →The part most often added in each category by thousands of builds that include this one
Wilson Combat AR-15 Lower Receiver Forged
Strike Industries Ambidextrous Magazine Release, Black - ARAMBIMRBK
Geissele Automatics AR-15 SSA-E X Lightning Bow Trigger
Timber Creek Outdoors Ambidextrous Safety Selector - Black
Wilson Combat AR-15 Starburst Gunfighter Pistol Grip Black
Strike Industries Extended Bolt Catch
Aggregated and anonymized data showing how builders use this product
Builds in the community that include the CMMG AR-15 HD Pivot and Takedown Pin Parts Kit - 55AFF3B
| Build | Parts | Total |
|---|---|---|
| Combat ar-15 | 16 | $441.27 |
| Ar-15 | 21 | $2253.35 |
 | 23 | $2833.90 |
 | 22 | $916.05 |
 | 22 | $1394.01 |
 | 21 | $831.88 |
 | 23 | $3989.84 |
 | 22 | $821.99 |
 | 18 | $1218.29 |
 | 17 | $2556.96 |
 | 17 | $784.93 |
 | 22 | $2246.83 |
1 global rating
Top reviews
CMMGs HD pin kit includes the pins, springs, detents, and the small parts needed for a complete lower build. The HD pins themselves have a slightly larger head profile which makes takedown easier. Phosphate finish across all the steel parts. Saves piecing things together.
