Daniel Defense DDM4 300 S, URG, 10.3in, 300 AAC Blackout Complete Upper Receiver w/ Flash Hider 23-088-19020-047 Caliber: .300 AAC Blackout, Finish: Matte, $101.00 Off w/ Free S&H

The Daniel Defense M4 300S Upper Receiver Group w/ Flash Hider comes equipped with a rugged, cold-hammer-forged 10.3-inch barrel with a Strength-to-Weight profile. Daniel Defense produces these AR15 Upper Receivers for those who crave a high-performance, short-barrel rifle in 300BLK caliber. Each Daniel Defense M4 300S Upper Receiver Group comes with a flash suppressor and a low-profile pistol length gas system that provides smooth operation and reduces felt recoil. A DDM4 Rail 9.0 handguard allows room for accessories and has 3 comfortable Santoprene panels that are heat resistant up to 300 degrees to protect you from the hot barrel and gasses. Treat yourself and your platform to the Daniel Defense M4 300S Complete Upper Receiver Group w/10.3in 300BLK Barrel.

Specifications for Daniel Defense DDM4 300 S, URG, 10.3in, 300 AAC Blackout Complete Upper Receiver w/ Flash Hider:

Features of Daniel Defense M4 300S, Upper Receiver Group, 10.3in, 300 AAC Blackout Barrel, Flash Hider 23-088-19020-047:

• Mil-Spec upper receiver with indexing marks and M4 feed ramps. CNC machined of 7075-T6 Aluminum with Type III hard-coat anodized finish.
• Chrome Moly Vanadium Steel 10.3-inch barrel is cold hammer forged with 1:8 twist, S2W (Strength-to-Weight) profile, pistol length gas system, chrome lined, MP tested, and Mil-Spec heavy phosphate coated.
• Gas system is pinned low profile gas block CNC machined of 4140 hardened steel with Mil-Spec heavy phosphate coating. Pistol length. Direct impingement.
• Daniel Defense Flash Suppressor of 17-4 PH stainless steel with salt bath nitride finish.
• Bolt Carrier Group: M16 Profile, Mil-Spec MP tested, chrome lined, properly staked gas key.
• Daniel Defense DDM4 Rail 9.0, CNC machined from 6061-T6 aluminum with Type III hard-coat anodized finish.
• Daniel Defense Vertical Grip made of glass-filled polymer with soft-touch overmolding.

Package Contents:

• Daniel Defense M4 300S, Upper Receiver Group, Flash Hider, 10.3in 300BLK Barrel 23-088-19020-047

GunTuber Holiday Picks 2025

Handpicked products from your favorite content creators.

Click Here to Explore the Picks.

Daniel Defense Warranty: Guaranteed Satisfaction

All Daniel Defense products carry a 100% satisfaction guarantee against defects in original materials and workmanship. If your Daniel Defense product shows evidence of such defects, Daniel Defense will make every accommodation to fix, repair, or replace your product in the most expeditious manner possible. Daniel Defense does not warranty products or damage caused to our products by the correct or incorrect installation of other manufacturer's products.

Warranty information and warranties are supplied solely by the manufacturer, and not this retailer. This retailer publishes information from the manufacturer for information purposes only, and the manufacturer is solely responsible and liable for any warranty information and warranties published by this retailer. Please reference the appropriate manufacturer documents or reach out to the manufacturer directly for full warranty terms and effective dates.

What firearm models does the manufacturer say Daniel Defense DDM4 300 S, URG, 10.3in, 300 AAC Blackout Complete Upper Receiver w/ Flash Hider is compatible with?