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Standard pins can migrate sideways - called pin walk - under sustained firing, especially in higher-cyclic-rate applications like FRT and active reset trigger builds. Anti-walk pins eliminate that movement entirely." } }, { "@type": "Question", "name": "Why do these include 2 Allen wrenches?", "acceptedAnswer": { "@type": "Answer", "text": "Each anti-walk pin has a set screw on both ends - left and right - that must be tightened to lock the pin. Having two Allen wrenches means you can tighten from both ends simultaneously without needing a second tool or having to reposition. It is the correct way to install anti-walk pins and ensures even clamping pressure on both sides of the lower." } }, { "@type": "Question", "name": "Are these compatible with my AR-15 lower?", "acceptedAnswer": { "@type": "Answer", "text": "Yes. These anti-walk pins are compatible with all mil-spec AR-15 lower receivers. They replace standard trigger and hammer pins - no modification to the lower required." } }, { "@type": "Question", "name": "Are anti-walk pins required for FRT and active reset trigger builds?", "acceptedAnswer": { "@type": "Answer", "text": "Anti-walk pins are strongly recommended for FRT and active reset trigger builds. Higher cyclic rate fire puts more lateral stress on trigger and hammer pins than standard semi-auto fire. Anti-walk pins prevent pin migration that can cause malfunctions or damage your lower over time." } }, { "@type": "Question", "name": "What is the difference between anti-walk and anti-rotation pins?", "acceptedAnswer": { "@type": "Answer", "text": "Anti-rotation pins use a tab or notch to prevent the pin from spinning inside the receiver. Anti-walk pins use set screws to prevent the pin from sliding laterally out of the receiver. 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padding: 0 !important; margin: 12px 0 0 !important; } #pw .awp-links li { padding: 7px 0 !important; border-bottom: 1px solid #eeeeee !important; font-size: 14px !important; } #pw .awp-links li:last-child { border-bottom: none !important; } #pw .awp-disclaimer { margin-top: 28px !important; padding-top: 16px !important; border-top: 1px solid #dddddd !important; font-size: 12.5px !important; color: #888888 !important; line-height: 1.6 !important; } Trigger Supply A AR-15 Anti-Walk Pins A Steel A Includes 2 Allen Wrenches Standard mil-spec trigger and hammer pins walk. Under sustained firing - especially in FRT builds, active reset setups, or any high-cyclic-rate application - those pins migrate sideways and cause malfunctions. The Trigger Supply AR-15 Anti-Walk Pins lock your trigger and hammer pins in place with a set screw on each end, eliminating pin walk entirely. And unlike most anti-walk pin sets, these come with two Allen wrenches included - one for each end - so you can tighten both set screws simultaneously without hunting for a second tool. The correct installation method, included in the box. What&';s Included Anti-Walk Pin Set Trigger pin and hammer pin - power coated steel, set screw on each end for dual-side locking. 2 Allen Wrenches One wrench per pin end. Tighten both set screws simultaneously - the right way to install anti-walk pins. No extra tools needed. Why Anti-Walk Pins Eliminates trigger and hammer pin migration - set screws on both ends lock the pin laterally inside the lower, preventing any sideways movement under firing Required for FRT and active reset builds - higher cyclic rate fire puts significantly more lateral stress on pins than standard semi-auto. Anti-walk pins are not optional on these builds Power coated steel - durable finish resists corrosion and wear through thousands of rounds Drop-in replacement - replaces standard mil-spec trigger and hammer pins with no lower modification required Two Allen wrenches included - tighten both ends simultaneously for even clamping pressure. Most sets make you find your own tools Compatible with all mil-spec AR-15 lowers - fits any standard lower receiver The Two-Wrench Difference Every anti-walk pin has a set screw on the left side and another on the right side. To lock the pin correctly you need to tighten both simultaneously - otherwise you risk uneven pressure that can cause the pin to bind or allow micro-movement on the loose side. Most anti-walk pin sets ship without any tools and leave you to figure that out yourself. These ship with two Allen wrenches - one for each end. Put one wrench on each side and tighten together. Proper installation, no improvisation required. Compatibility All Mil-Spec AR-15 Lowers FRT Builds Super Safety Builds ARC-Fire Builds Standard Semi-Auto Geissele Triggers LaRue Triggers Mil-Spec FCG Specs Material Steel - Power Coated Finish Power Coat / Anodized - Black Pin Type Anti-walk - set screw both ends Compatibility All mil-spec AR-15 lower receivers Includes Trigger pin, hammer pin, 2 Allen wrenches Lower Modification None - drop-in replacement Brand Trigger Supply Heads Up - FRT & Active Reset Builders If you are running an FRT, Super Safety, ARC-Fire, or any active reset trigger system in your AR-15, anti-walk pins are not optional - they are a required component. The AS Designs MP5 lowers also require anti-walk pins. Make sure these are in your build before you run it. Frequently Asked Questions What are anti-walk pins and why do I need them? Anti-walk pins replace your standard mil-spec trigger and hammer pins and use a set screw on each end to lock the pin in place inside the lower receiver. Standard pins can migrate sideways - called pin walk - under sustained firing, especially in higher-cyclic-rate builds. Anti-walk pins eliminate that movement entirely, preventing malfunctions and lower damage. Why do these include 2 Allen wrenches? Each anti-walk pin has a set screw on both the left and right end. To lock the pin correctly you tighten both set screws simultaneously - one wrench on each side. This ensures even clamping pressure across the full width of the lower. Two wrenches are included so you can do this correctly without sourcing your own tools. Are these compatible with my AR-15 lower? Yes. These anti-walk pins are compatible with all mil-spec AR-15 lower receivers. They replace standard trigger and hammer pins with no modification to the lower required. Are anti-walk pins required for FRT and active reset trigger builds? Strongly recommended and effectively required. Higher cyclic rate fire puts significantly more lateral stress on trigger and hammer pins than standard semi-auto fire. Anti-walk pins prevent pin migration that can cause malfunctions or damage your lower receiver over time. If you are running an FRT, Super Safety, ARC-Fire, or similar system - use anti-walk pins. What is the difference between anti-walk and anti-rotation pins? Anti-rotation pins use a tab or notch to prevent the pin from spinning inside the receiver. Anti-walk pins use set screws to prevent the pin from sliding laterally out of the receiver. Anti-walk pins address the more common failure mode - lateral migration - and are the correct choice for FRT and active reset builds. Note: the AS Designs MP5 lower specifically requires anti-walk pins and is not compatible with anti-rotation pins. Pairs Well With Trigger Supply M16 Full Auto Cut BCG - USA Made ($149.99) Super Safety AR-15 Active Reset Selector AR-15 Buffers - H2, H2.5, H3 for FRT Builds Kabuto FRT - Metal Ambi Selector ($129.99) Best FRT Triggers for AR-15 - 2026 Buyer&';s Guide Are FRT Triggers Legal? - State-by-State Guide It is the buyer&';s responsibility to understand and comply with all applicable local, state, and federal laws regarding firearm parts and accessories. Install by a qualified individual familiar with AR-15 platforms. Trigger Supply is a brand of TTT Innovations.