Inspired by US Military Carbines
For those looking to match the specs and performance on the M4A1 SOCOM Block II carbines used by troops during Operations Iraqi Freedom and Enduring Freedom, the Daniel Defense M4A1 SOCOM Block II Upper Receiver is a great starting point.
The Daniel Defense M4A1 SOCOM Block II Upper Receiver features a quad-rail handguard equipped with a Picatinny-compatible rail sections. The barrel is constructed from mil-spec chrome-moly vanadium steel and features a standard Government profile (current SOCOM issue) with a chrome-lined interior, matching military-style barrels with the same construction.
- Made from 7075-T6 aluminum
- Barrel length: 16 inches
- Twist rate: 1:7
- Does not include BCG, charging handle or flash hider
The Daniel Defense M4A1 SOCOM Block II Upper Receiver features a flat dark earth anodized finish. The rifle can be had with an F-marked front sight gas block or a low-profile gas block under a full-length forend.
Big Book Catalog, Issue:71, Page:003
Classic Retro Chrome M16 Bolt Carrier Groups match the finish of the bolt found on the earliest AR-15 & M16 rifles introduced.
The Brownells M16 Chrome 5.56 Complete Bolt Carrier Group included a bolt machined from 9310 steel, which is magnetic particle inspected & finished with a slick chrome finish. The carrier is fabricated from 8620 hardened steel and also receives the same, durable chrome application. In addition to the bolt and carrier, the extractor, gas key and cam pin also are chromed to ensure all moving parts are corrosion resistant and as slick as possible. The Brownells M16 5.56 Chrome Complete Bolt Carrier Group is designed to work easily and reliably in any AR-15 or M16 rifle chambered in 5.56x45mm, 300 AAC Blackout or .223 Remington.
The perfect complement to a retro build, these BCGs are available with or without forward assist serrations. The model without serrations is similar to the original BCG found on early AR-15s, such as the Air Force 601. The model with serrations could be found on early XM16E1 models in the mid-1960s.
- Durable, lubricious chrome finish
- Magnetic-particle inspected, 9310 bolt
- M16 8620 steel carrier (works with standard AR-15 rifles)
- Extractor includes spring and rubber insert
- Includes torqued and staked gas key
- Functions with any cartridge based on the 5.56 NATO cartridge case
The Brownells M16 Chrome 5.56 Complete Bolt Carrier Group comes with a bolt, bolt carrier, gas key, firing pin, cam pin and a firing pin retaining pin.
Big Book Catalog, Issue:71, Page:011