The KNS Non-Rotating Pin Kit (brand part no. NRTHPMOD21555BLACK) replaces the factory trigger and hammer pins on an AR-15/M16 lower with a non-rotating design that reduces receiver wear over time. This Gen 2 Mod 2 kit uses oversize .1555-inch diameter stainless steel pins built for special applications where the standard .154-inch pin size doesn’t provide a tight enough fit, and black nitride-treated sideplates lock the pins in place so they can’t spin and gradually enlarge the pin holes. It’s a precision upgrade for shooters who want to protect their receiver and tighten up trigger pull consistency, especially on lowers needing the slightly larger pin diameter.

Key Specifications

• The pins measure an oversize .1555-inch diameter for special-fit applications.
• Pins are made from stainless steel.
• The sideplates are black nitride treated for durability.
• It uses a non-rotating design to reduce receiver wear over time.
• It’s the Gen 2 Mod 2 version of KNS’s pin kit line.

Frequently Asked Questions

Why choose the .1555 size over the standard .154? The .1555 pins are oversize, built for special applications needing a slightly larger diameter fit.

What does a non-rotating pin do differently? It locks in place instead of spinning, which helps prevent the pin holes in the receiver from gradually wearing larger.

Buy the KNS Non-Rotating Pin Kit, .1555

Get a precise, oversize-fit pin kit with the KNS Non-Rotating Pin Kit, Gen 2 Mod 2, .1555. Shop more KNS Precision gun accessories and parts and get fast shipping from our Lubbock, Texas gun shop.