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: Manufacturer: Daniel Defense Cartridge: .300 AAC Blackout Finish: Matte Color: Black Gun Model: M4 Condition: New Magazine Included: No 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 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. @media screen and (max-width: 400px) { #w-block-one { display:table-row !important; } }
Daniel Defense DDM4 300 S, URG, 10.3in, 300 AAC Blackout Complete Upper Receiver w/ Flash Hider
$1,307.00
Category: Daniel Defense
6 reviews for Daniel Defense DDM4 300 S, URG, 10.3in, 300 AAC Blackout Complete Upper Receiver w/ Flash Hider
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Rickshaw –
I love Daniel Defense products and customer service. Would recommend to anyone looking for a quality AR-15, and parts. There a quality product produced in the good ole USA. Now they want this review to 200 words so this sentence should be sufficient.
Rob –
It's a MK18 in .300BLK, product was obviously perfect because Daniel Defense QC is among the best in the business. If you want a very reliable and durable shorty upper in .300BLK, there are not many options better than this.
clickhouse –
This is a great deal. This is a very high-quality DD SOCOM-MK18 upper chambered in 300 Blackout. A MK 18 retails from DD for $2,200. The math is simple: pair this with a very high quality lower and use the savings to buy ammo.It is heavy because of the pic rails on top, bottom, left and right, but that doesn't bother me. The bird cage flash hider works well, but let's be honest you're going to be shooting this suppressed. And the really good news is that, in my experience, range and match supers and subs cycle fine with a suppressor. I haven't had to make a change to the buffer assembly and haven't had to consider an adjustable gas block. It just works.
Stewart –
Replaced the flash hider with a SilencerCo ASR muzzle brake, then installed the upper onto a registered SBR lower. I ran several different types of 300 Blackout ammo through it including Winchester, Sig Sauer, Fiocchi, and PPU, and several different bullet weights from 110 grain supers to 220 grain subs. All cycled flawlessly, all locked back on the last shot, no matter whether I was shooting supers or subs, suppressed or unsuppressed. FWIW I was using a carbine spring and carbine buffer. Simply put, I could not be happier with this Daniel Defense 300 Blackout upper. Paired with a SilencerCo Omega 9K suppressor, I think I just found my new favorite firearm.
J –
Quality Quality Quality. Thank you Palmetto State Armory for another sweet deal!
king –
Amazing price. Can’t beat a DD upper for the name and quality for the price. Will be buying from here in the future.