Step back in time and elevate your retro AR-15 build with the Linemount Retro M16A1 Rear Sight Aperture Kit. Designed for enthusiasts who crave the authentic look and feel of vintage firearms without the premium price tag, this kit delivers period-correct precision for M16A1-style uppers. Whether you're restoring a Colt SP1 or crafting a custom retro rifle, this aperture kit ensures reliable sighting that honors the classic design while enhancing your shooting experience. Key Features Authentic Reproduction Design: Faithfully replicates the original M16A1 rear sight aperture, featuring dual apertures for versatile targeting- a smaller peep for long-range accuracy and a larger one for close-quarters speed. High-Quality Construction: Crafted from durable steel with a manganese phosphate finish for corrosion resistance and that unmistakable vintage patina, ensuring longevity in your tactical setup. Complete Kit Inclusion: Comes with the aperture, detent, spring, and necessary components for straightforward assembly, saving you time and hassle during installation. Retro Build Compatibility: Perfectly fits A1-style rear sight assemblies on early AR-15s, M16s, and SP1 models, allowing seamless integration into your historical firearm project. Specifications Model: M16A1 Rear Sight Aperture Material: Steel with phosphate coating Weight: 1 oz Compatibility: A1-style rear sights only (not compatible with A2) Aperture Sizes: Standard dual configuration for 0-300m and long-range adjustments Why Choose This Product Building a retro AR-15 can be challenging when sourcing authentic parts that don't break the bank. The Linemount kit addresses this by providing affordable authenticity that outperforms generic knock-offs in fit and finish. Users often struggle with imprecise apertures that throw off zeroing or loose components that affect reliability-these issues vanish with Linemount's precise engineering. Benefit from enhanced accuracy on the range, a historically accurate profile for collectors, and the confidence of a sight system built to withstand rigorous use. Ideal for hobbyists and tactical shooters alike, this kit transforms your rifle into a functional piece of history. Ready to complete your retro masterpiece? Add the Linemount Retro M16A1 Rear Sight Aperture Kit to your build today and experience the precision of yesteryear with modern reliability. Frequently Asked Questions Q: Is this kit compatible with A2-style rear sights? A: No, this kit is specifically designed for A1-style rear sights. For A2 compatibility, consider alternative products. Q: What tools are needed for installation? A: Installation typically requires a rear sight installation tool, punch set, and hammer. Follow standard AR-15 sight procedures to ensure proper alignment and secure fit. Q: Does the kit include the windage drum? A: This aperture kit focuses on the peep and related components. The windage drum is sold separately for full customization.