ERA-TAC M4-Style Back-up sight (Kit) 1.35mm post

• Spring-loaded folding design: The sights fold down automatically and stay protected when not needed, reducing the chance of impact damage on rifles that are carried hard or used around vehicles, barricades, and field gear.
• Ultra-low 9 mm / 0.35” folded height: The slim profile keeps the sight set out of the way under optics and accessories, so it works as a true backup without adding unnecessary bulk to the rifle.
• 1.35 mm / 0.05“ front post: The finer post supports more precise alignment than a thicker front blade, which helps when confirming zero or taking careful shots at longer distances with iron sights.
• Dual ghost-ring rear sight: Two apertures, 5 mm and 1.7 mm, give the shooter a fast option for close work and a tighter option for more deliberate aiming without changing the sight plane.
• Tool-free height-adjustable, replaceable posts: Front-sight adjustment and post replacement are straightforward in the field, making it easier to adapt the sight to the rifle and maintain a usable backup aiming system.

About the ERA-TAC Accessories Series

ERA-TAC Accessories is the support line around the brand’s tactical mounting systems, built for shooters who need practical add-ons rather than cosmetic extras. Introduced as part of the ERATAC range launched in 2010 for civilian users and law enforcement, the series covers a broad mix of hardware including adapters, sling-related components, interface parts, and backup sights. The common theme is a focus on modularity, compact dimensions, and dependable function on rifles set up for hunting optics, tactical optics, or general-purpose field use.

Within this family, the backup-sight models stand out for their spring-loaded folding mechanism, their low-profile layout, and their ability to fit rifles equipped with a Picatinny rail. The series also includes different front-sight styles and post widths, allowing the shooter to choose between a more open or more precise sight picture. That makes the line especially relevant for rifles that normally carry a scope or red dot but still need a robust secondary aiming system. Across the series, the design philosophy stays consistent: compact metal construction, straightforward adjustment, and accessories that integrate cleanly with modern rifle platforms.

About the ERA-TAC M4-Style Back-up sight (Kit) 1.35mm post

The ERA-TAC M4-Style Back-up sight (Kit) 1.35mm post is a folding iron-sight set for rifles with a Picatinny rail, intended as a compact reserve aiming system behind a primary optic. Its layout follows the familiar AR-style sight concept, which makes it easy to understand and quick to deploy on rifles used for training, duty-style setups, or practical field shooting. Because the kit includes both the front and rear sight, it provides a complete backup solution rather than a single replacement component.

What distinguishes this version is the 1.35 mm / 0.05“ front post. Compared with a broader post, it gives a more refined aiming reference, which is useful when zeroing carefully or when iron sights are expected to do more than emergency close-range work. At the rear, the sight uses two ghost rings, 5 mm and 1.7 mm, positioned on the same plane. In practice, that gives the shooter a fast aperture for rapid target acquisition and a smaller aperture for more controlled, precise alignment.

The mechanical design is equally important. The spring-loaded folding mechanism helps protect the sights during hard use, while the 9 mm / 0.35” folded height keeps the set unobtrusive under a magnified optic or red dot. ERA-TAC also uses replaceable front posts that can be adjusted in height without tools, which simplifies setup and maintenance. Combined with the black anodized aluminium construction and corrosion-resistant finish, the result is a backup sight set built for regular field handling rather than occasional range use.

About ERA-TAC

ERA-TAC is a brand of Recknagel GmbH & Co. KG, based in Bergrheinfeld, Germany. Recknagel was founded in 1867 in Albrechts near Suhl, Thuringia, and built its reputation around firearm mounting solutions and related accessories. The company later relocated to Schweinfurt in 1948 and moved to Bergrheinfeld in 2006. For modern tactical applications, Recknagel began producing the ERATAC line in 2010, covering mounts, Picatinny rails, backup sights, and other weapon accessories for civilian and military use.

In this product category, the brand is known for machining components from solid aluminium and finishing them with a hard-anodized surface suited to demanding field conditions. The ERATAC range reflects Recknagel’s long experience with rifle interfaces and mounting geometry, with products aimed at hunting, sport shooting, and tactical rifle setups where repeatable fit and durable construction matter.

Main Features

• Manufacturer: ERA-TAC
• Series: ERA-TAC Accessories
• Type: Picatinny Rail
• Material: Aluminium
• Color: Black - Anodized
• Made in: Germany

Warranty

2 years. ERA-TAC states a 2-year warranty period for this product.

In the Box

• Folding front sight with 1.35 mm / 0.05“ wide post
• Folding rear sight