Carl Gustaf 4000 Picatinny Rail

MOA stands for Minute of Angle and indicates the rail's incline. An angled rail compensates for bullet drop over distance by tilting the scope slightly forward. This gives you more elevation adjustment in the scope's turret – if you need to shoot very far.

For most target and hunting scenarios, 0 MOA (flat rail) is more than sufficient. If you are shooting at longer distances or using a scope with limited elevation, 10 or 20 MOA can give you the extra margin you need.

Read more in our article:What is MOA, and when do you need it?

This rail is made of steel, which remains the classic choice for both mounts and Picatinny rails. Steel has high rigidity and is extremely durable. The material can withstand repeated mounting and unmounting without the contact surfaces deforming.

Steel is heavier than aluminum, but for a Picatinny rail, the weight difference is minimal in practice – typically less than 50 grams.

Read more:Steel vs. aluminum – which is best for your rifle?

This rail is QPQ-treated (Quench-Polish-Quench). QPQ is a salt bath nitriding process that creates an extremely hard and corrosion-resistant surface. The treatment penetrates the steel and is not merely a coating – even deep scratches will still reveal treated material.

QPQ provides a matte, black finish and is the most durable surface treatment for steel rails and steel mounts. A QPQ-treated rail requires minimal maintenance and can withstand heavy use in all weather conditions.

Read more:QPQ treatment – what is it, and why is it important?

Mounting this rail is quick and simple. The rail is attached directly to the receiver of the rifle with the included screws.

Manufacturer's recommendation:

• Torque: 3.5 Nm
• Use oil on the screws (NOT threadlocker)
• Tighten the screws in a cross pattern for even distribution

A torque wrench is necessary for proper installation. Overtightening can damage the threads in the receiver.

Read more:Mounting a Picatinny rail – complete guide

Rails and mounts from HG Firearms are designed and custom-made in Denmark. The primary material is steel, and no compromises are made. They are known for precision-manufactured steel rails with QPQ surface treatment, providing maximum durability and corrosion protection. HG Firearms covers a wide range of rifle platforms with a focus on quality and fit.

Read more about HG Firearms here:HG Firearms

See all products from HG Firearms:HG Firearms Collection

This rail is manufactured according to the NATO STANAG 2324 / MIL-STD-1913 standard (Picatinny). This means it is compatible with all standard Picatinny mounts, rings, and accessories – regardless of the manufacturer.

The Picatinny standard ensures that you can freely combine rails, mounts, and optics from different manufacturers. This gives you the flexibility to upgrade or change your scope without changing the rail.

See compatible mounts: Scope Mounts