GDI operators in overwatch position with precision rifles
EST. 2002 — Combat Proven

Marksman
Grade
Engineered Mounts™

Aerospace-Grade Stainless Steel / Aluminum optic mounts and modular interfaces—engineered for the duty rifle and battle rifle—refined for the precision platform. Every Shot · Every Time™

G1-OSM™ GEN 4/M14 / M1A® OPTIC MOUNT/17-4PH STAINLESS / 4140 CrMo/MATCH-GRADE/BATTLEFIELD HERITAGE/MICRO-T2 FOOTPRINT/ALQD™ AUTO-LOCKING QUICK-DETACH/RTZ .01 MOA/ACOG® FOOTPRINT/EYE-RELIEF ENHANCEMENT/G1-OSM™ GEN 4/M14 / M1A® OPTIC MOUNT/17-4PH STAINLESS / 4140 CrMo/MATCH-GRADE/BATTLEFIELD HERITAGE/MICRO-T2 FOOTPRINT/ALQD™ AUTO-LOCKING QUICK-DETACH/RTZ .01 MOA/ACOG® FOOTPRINT/EYE-RELIEF ENHANCEMENT/G1-OSM™ GEN 4/M14 / M1A® OPTIC MOUNT/17-4PH STAINLESS / 4140 CrMo/MATCH-GRADE/BATTLEFIELD HERITAGE/MICRO-T2 FOOTPRINT/ALQD™ AUTO-LOCKING QUICK-DETACH/RTZ .01 MOA/ACOG® FOOTPRINT/EYE-RELIEF ENHANCEMENT/
// G1-OSM™ Gen 4 — M14 / M1A® Optic Mount

G1-OSM™ Gen 4 — First Production 2027

First production expected 2027. Join the release list — no payment required. We'll notify you when ordering opens.

Reserve My Spot
// 03 — Heritage

From the GWOT theatre
to the modern firing line.

Since 2002, GDI has operated as a Tier 1 Supplier to Prime Contractors on domestic and international defense and federal law enforcement contracts. Our mounting platforms have been fielded, carried, and validated by professionals operating at the edge. We carry that institutional discipline into every unit we ship — across defense, law enforcement, and shooting sports markets.

20+
YEARS OF FIELD SERVICE
100%
USA DESIGN & MANUFACTURE
∞
LIFETIME WARRANTY
T1
TIER 1 SUPPLIER
// 04 — Frequently Asked

FAQ, answered.

Last Updated — May 2026
Product & Technical

Ordering & Shipping

Returns & Warranty

Military, Law Enforcement & Dealer Inquiries

Still have questions?
info@gdiusa.co

Spec your platform.

Procurement officers, unit armorers, and OEM engineering partners — request a capability brief or contact our team directly.