TruGlo Picatinny Rail TG8940A – Brilliant Red Dot Mount

Description

The TruGlo Picatinny Rail TG8940A is a red dot mount from TruGlo (model Picatinny Rail), listed for Ruger 10 / 22 with a Picatinny / Weaver interface.

TruGlo Picatinny Rail TG8940A Overview

A red dot mount raises and secures a reflex or micro red dot on a rail, setting the dot at the height that matches your stock and shooting style. The right height is what makes the dot appear naturally when you shoulder the rifle.

Absolute and lower-third heights are the two common choices: absolute puts the dot level with iron sights, while lower third places the irons in the bottom of the window for a cleaner view.

Fit and Compatibility

The distributor lists fit as Ruger 10 / 22. Mount type: Picatinny / Weaver. Confirm the exact firearm model, receiver or slide cut, and the optic you plan to run before ordering, because mounting parts are made to precise dimensions and a near miss does not fit.

Installation Tips

Degrease the screws and mating surfaces, then snug the fasteners in an even, alternating pattern. Use a torque wrench and follow the maker’s inch-pound values; overtightening can crush a scope tube or strip threads, while undertightening lets the optic walk under recoil. A drop of thread locker on base screws, but not ring cap screws unless the maker says so, keeps everything in place.

Build and Materials

It is made from aluminum and finished in matte black anodized. Machined aluminum and steel parts hold tolerances well, while polymer parts save weight and resist corrosion.

Holding Zero

The real test of any mount is return to zero: the optic should come off and go back on, or ride through hundreds of rounds, without the point of impact wandering. Rigid materials, precise machining and correct torque all contribute. Witness marks with a paint pen make it easy to spot movement at a glance.

Honest Limitations

No single mounting part fits every firearm and optic. Height, eye relief, footprint and rail spacing all vary, and a part that is perfect for one setup can be wrong for another. Budget mounts can work well on rimfires and light recoiling rifles, but heavy recoil and duty use reward premium machining.

Care and Storage

Wipe off dirt and moisture after a wet hunt with a microfiber cloth, keep a small set of the correct bits or wrenches in your range bag, and check fasteners at the start of each season. A light coat of oil on steel parts prevents rust, while anodized aluminum only needs to be kept clean. Protect the optic from dust and rain when the rifle is stored or cased.

Before You Buy

Match the part to your exact firearm and optic, check the height and size listed above, and contact us with the model of your rifle, pistol or scope if you are unsure. Mounting parts and optic accessories are not firearms and ship without an FFL transfer.

Common Setup Mistakes

The most common problems we see at the counter are simple ones: rings or mounts that are too tall or too short for the shooter, scopes mounted too far back so the eyepiece hits the brow under recoil, reticles that are not level with the rifle, and screws that were tightened by feel instead of to spec. Another frequent issue is mixing parts made for different rail standards, such as Weaver and Picatinny, which can let a mount shift. Take a few extra minutes during setup and the optic will reward you with consistent groups for years.

Specifications

• Brand: TruGlo
• Model: Picatinny Rail
• Manufacturer number: TG8940A
• Type: red dot mount
• Fits: Ruger 10 / 22
• Mount type: Picatinny / Weaver
• Material: Aluminum
• Finish: Matte Black Anodized
• UPC: 788130025468

Who It Is For

The TruGlo Picatinny Rail TG8940A is a great fit for carbine and shotgun owners who want their red dot at the right height.

Buy the TruGlo Picatinny Rail TG8940A at MAG5 Firearms

MAG5 Firearms is a family-owned FFL in Collegeville, Pennsylvania. Order the TruGlo Picatinny Rail TG8940A online, or browse our scope mounting and optics categories for more. For factory details, visit TruGlo.