Free Shipping & Free Returns*

FREE SHIPPING on Over 250,000 Products

Shop now and get Free Value Shipping on most orders over $49 to the contiguous 48 states, DC, and to all U.S. Military APO/FPO/DPO addresses.

Enjoy our FREE RETURNS

We want to ensure that making a return is as easy and hassle-free as possible! If for any reason you are not satisfied with your purchase, simply return the item within 30 days of receipt, and we'll cover the cost of return shipping. Learn more about our Return Policy.

Shopping Cart
Government Export Restriction Government Export Restriction
Questions & Answers
Does the MST-100 come with the mount that is pictured with the product?

Nope. In reading the product description there is a heading "Package Contents" that tells you what is included.

by Chilipecker, Verified Owner, March 19, 2026

Product Discontinued by Manufacturer

U.S. Optics MST-100 10x42mm 1inch Tube Rifle Scope, First Focal Plane has been discontinued by U.S. Optics and is no longer available. Our product experts have helped us select these available replacements below.You can also explore other items in the Rifle Scopes & Accessories, Rifle Scopes yourself to try and find the perfect replacement for you!

Product Info for U.S. Optics MST-100 10x42mm 1inch Tube Rifle Scope, First Focal Plane

Originally developed in the 1970s by John Unertl for the USMC, the MST-100 was purpose-built for the M40A1 .308 rifle and later adapted for the .50BMG. Designed for uncompromising durability, its housing and turrets are precision-machined from 1018 steel, ensuring reliability in the harshest conditions. The elevation turret features an integral BDC calibrated for M118LR ammunition, with a veneer ring for fine-tuned ? MOA adjustments.image

In 2000, U.S. Optics took on the refurbishment contract, rebuilding these legendary optics to an even higher standard. To accommodate the M40A3s 30 MOA base, we replaced the original leaf springs with a tapered coil spring, delivering flawless tracking. The scopes were further enhanced with a rugged coating for superior corrosion resistance. The original wire MIL-Dot reticle was upgraded to a recoil-resistant design, engineered to withstand the punishing forces of the .50 caliber platform.

Due to overwhelming demand, U.S. Optics is releasing an exclusive production run of just 100 MST-100 scopes. With modern materials and CNC precision, this limited-edition optic delivers legendary performance with contemporary advancements, standing among the finest precision scopes available today.

Package Contents:

  • U.S. Optics MST-100 10x42mm 1inch Tube Rifle Scope, First Focal Plane

Riflescope Accessories

1–60 / 60
Previous
Next

Firearm Case

1–22 / 22
Previous
Next

Related Products to U.S. Optics MST-100 10x42mm 1inch Tube Rifle Scope, First Focal Plane

U.S. Optics MST-100 10x42mm 1inch Tube Rifle Scope, First Focal Plane Unavailable & Discontinued Models

List of Unorderable Models

  • U.S. Optics MST-100 10x42mm 1inch Tube Rifle Scope, First Focal Plane, Mil-Dot, Matte Black, MST-100 , MPN: MST-100 , UPC: 811069022380 , Code: XP-RS-OS01RS-MST-100
Compare (0)