Davidson Defense Left-Handed Ronin Competition 16.5-inch Mid-Length-Gas 1:7 5.56 NATO AR-15 Freefloat M-Lok Handguard Rifle Full Build Kit

Left-Handed Ronin Competition 16.5-Inch Mid-Length-Gas 1-7 5.56 NATO AR-15 Freefloat M-LOK Handguard Rifle Full Build Kit

This is a left-handed AR-15 full build kit chambered in 5.56 NATO, centered on a 16.5-inch satellite medium profile barrel with a QPQ nitride finish, a 1-7 twist rate optimized for 5.56 NATO, and a mid-length gas system. The left-handed Black Diamond Series slick side billet aluminum upper receiver anchors the front end, a purpose-built left-hand ejection upper with a clean slick side exterior profile that omits the forward assist from the receiver body. The mid-length stainless steel gas tube and micro low-profile steel gas block at .750 complete the gas system, and the 15-inch freefloat M-LOK handguard in black with a partial Picatinny top rail covers the forend. An A2 GI Birdcage flash hider at 1-2x28 closes out the muzzle end. A Davidson Defense premium left-handed M16 nitride bolt carrier group and a Mil-Spec M4 charging handle complete the upper side. The lower completion package covers a complete Mil-Spec AR-15 lower parts kit, a Mil-Spec heavy-duty 6-position buffer tube, a standard AR-15 carbine buffer at 3 oz., a standard AR-15 carbine recoil spring made in the USA, a Mil-Spec AR-15 M16 receiver end plate, and a Mil-Spec AR-15 carbine castle nut. A Special Operations AR-15 stock closes out the rear end. Lower receiver not included.

Key Features

• 5.56 NATO chambering, 16.5-inch satellite medium profile barrel, QPQ nitride finish
• 1-7 twist rate optimized for 5.56 NATO, 1-2x28 thread pitch
• Mid-length gas system with mid-length stainless steel gas tube
• Micro low-profile steel gas block, .750
• Left-handed Black Diamond Series slick side billet aluminum upper receiver
• 15-inch freefloat M-LOK handguard, black, partial Picatinny top rail
• Davidson Defense premium left-handed M16 nitride bolt carrier group
• Mil-Spec AR-15 M4 charging handle
• A2 GI Birdcage flash hider, 1-2x28 thread pitch
• Black steel crush washer
• Complete Mil-Spec AR-15 lower parts kit
• Mil-Spec heavy-duty 6-position buffer tube
• Standard AR-15 carbine buffer, 3 oz.
• Standard AR-15 carbine recoil spring, made in the USA
• Mil-Spec AR-15 M16 receiver end plate
• Mil-Spec AR-15 carbine castle nut
• Special Operations AR-15 stock

Perfect For

• Left-handed AR-15 rifle builders who need everything above the lower receiver for a 5.56 NATO build
• Shooters pairing this kit with an existing stripped or complete AR-15 lower receiver configured for left-hand operation
• Left-handed builders who want a purpose-built left-hand ejection slick side billet upper and matching left-handed BCG with a complete rifle component set covered in one kit

Upper Assembly

The left-handed Black Diamond Series slick side billet aluminum upper receiver anchors the front end with a left-hand ejection port and a clean slick side exterior profile that omits the forward assist from the receiver body. The 16.5-inch satellite medium profile barrel brings a QPQ nitride finish and a 1-7 twist rate optimized for 5.56 NATO to the chamber, threaded at 1-2x28. The mid-length stainless steel gas tube and micro low-profile steel gas block at .750 run a mid-length gas system along the 16.5-inch barrel, a well-matched gas system length for this barrel profile and chambering. The 15-inch freefloat M-LOK handguard in black surrounds the barrel and gas system along the forend with a partial Picatinny top rail running along the top of the handguard and M-LOK slots along the remaining handguard body for accessory attachment.

Bolt Carrier Group and Charging Handle

The Davidson Defense premium left-handed M16 nitride bolt carrier group is a purpose-built left-hand BCG designed to function with the left-handed upper receiver and eject cases from the left side of the build. The nitride finish on the BCG covers the carrier and bolt in a durable surface treatment consistent with the QPQ nitride finish on the barrel. The Mil-Spec M4 charging handle pairs with the BCG inside the upper receiver to complete the upper interior and finish the front end of the build.

Muzzle Device

The A2 GI Birdcage flash hider threads onto the 1-2x28 muzzle end of the barrel. The included black steel crush washer seats at the barrel shoulder and completes the muzzle hardware for this kit.

Lower Completion Components

The complete Mil-Spec AR-15 lower parts kit covers the full internal lower component group, including the fire control group, magazine catch, bolt catch, and all associated pins and springs. The Mil-Spec heavy-duty 6-position buffer tube, standard AR-15 carbine buffer at 3 oz., and standard AR-15 carbine recoil spring made in the USA form the buffer system at the rear of the lower. The Mil-Spec AR-15 M16 receiver end plate and Mil-Spec AR-15 carbine castle nut lock the buffer tube down cleanly at the rear of the lower receiver. The Special Operations AR-15 stock closes out the rear end of the build on the Mil-Spec 6-position buffer tube.

Follow safe handling and manufacturer instructions. Ensure compliance with all applicable federal, state, and local laws. Lower receiver not included.