CRANE SPEC DT15 Upper is purpose-built for duty use with a dedicated suppressor. Tuned to shoot your defensive and duty ammo without the over-gassing found in many commercial guns. The .070 gas port allows suppressed use without changing springs, gas systems, or buffers. Still cycles most training ammo while suppressed. Paired with our 9.6" V1 M-LOK rail.

DUTY SPEC DT15 Upper is designed for professional use—suppressed or unsuppressed. With a .071 gas port, it cycles full-power 5.56 NATO and most .223 training ammo reliably without adjustment. Ideal for duty ammo, suppressors, and high-round-count performance. Comes with our 9.6" V1 M-LOK rail.

COM SPEC DT15 Upper is built to handle a wide range of 5.56 and .223 ammo. With a .073 gas port, it’s perfect for those who need flexibility—suppressed or not. Designed to run just about anything. Comes standard with our 9.6" V1 M-LOK rail.

DC SPEC DT15 Upper features our 11.5" barrel and sits between DUTY and COM specs. It eats most .223 and performs great with NATO-pressure 5.56. Built with our 10.6" V1 M-LOK rail for a compact, balanced profile.

All DT15 Uppers (Version 1) Feature:

• DT15 5.56 NATO 4150 CrMoV Barrel – hand-lapped, QPQ nitrided, 1:7 twist
• Purpose-tuned gas port: .070 (Crane), .071 (Duty), .073 (Com), DC tuned between
• Carbine-length gas system (10.5" / 11.5")
• 300BLK Uppers: Pistol-length gas system
• .750 gas block seat with DT anti-backout roll pin gas block
• DT15 9.6" MRS V1 Rail (10.6" on 11.5" barrel builds)
• DT15 Upper Receiver
• DT Nitride BCG – Chrome lined, Carpenter No. 158® bolt
• DT15 Charging Handle (Ambi on select models)
• DT Birdcage Muzzle Device (CRANE SPEC ships without a muzzle device)
• Sub-MOA Capable – achieved ¾" group with 75gr Black Hills

• 100% Made in the USA