PRO2A 16" 9mm 1/10 Pistol Caliber Melonite M-LOK Upper Kit

Bring the low-recoil, budget-friendly performance of the 9mm Luger cartridge to a full-sized rifle configuration with the PRO2A 16" 9mm Pistol Caliber Melonite M-LOK Upper Kit. This 100% American-made master build bundle contains every critical component required to transform a standard stripped lower receiver into a highly accurate, reliable Pistol Caliber Carbine (PCC). Built around a premium 16-inch 4150 CMV steel barrel, this kit utilizes a highly reliable direct blowback system engineered to interface seamlessly with 9mm dedicated lowers or conversion blocks. Complete with a pre-headspaced ramped M16-profile blowback bolt carrier group, standard charging handle, complete lower parts kit (LPK), and a matching 6-position adjustable carbine stock assembly, this all-inclusive package takes the technical guesswork out of building your next carbine.

Key Features

All-In-One Master Rifle Package: Eliminates component tracking and compatibility headaches by packaging the fully assembled 9mm upper, a ramped blowback BCG, a full lower parts kit, and a matching buffer stock extension group together.
Advanced Melonite Barrel Protection: The heavy-duty 4150 Chrome Moly Vanadium steel barrel is fully treated with an advanced Salt Bath Melonite finish inside the bore and across the exterior to maximize corrosion resistance and extend service life.
Optimal 1:10 Twist Rate: Precision button-rifled barrel geometry optimized to effortlessly stabilize popular 115gr and 124gr target ammunition, as well as heavier subsonic 147gr loads with consistent accuracy.
Ramped Direct Blowback BCG: Features a premium, high-strength 9mm bolt assembly designed with a ramped profile to work smoothly with standard hammer setups and feed reliably from Glock or Colt-style magazines.
Slim Profile Free-Float M-LOK Rail: Machined from high-strength aluminum, the lightweight free-float handguard isolates barrel vibrations to preserve uniform mechanical accuracy while providing a continuous top rail and modular M-LOK spacing.
Complete Stock & LPK Hardware: Comes paired with a full Mil-Spec lower parts kit and an adjustable 6-position carbine stock assembly paired with a specialized heavy buffer to handle PCC blowback pressures.

Technical Specifications

Upper Receiver Assembly	Mil-Spec Billet Aluminum, Slick-Side Caliber-Specific Layout (No Forward Assist), PCC Ejection Port, Type III Hardcoat Anodized Black Finish
Bolt Carrier Group (BCG)	Premium 9mm Direct Blowback BCG, High-Strength Steel Bolt Face, Ramped Profile, Nitride/Melonite Finish, Glock & Colt Magazine Compatible
Charging Handle	Standard Mil-Spec Aluminum Charging Handle Assembly
Barrel Component	16 Inch Profile, 4150 Chrome Moly Vanadium (CMV) Steel, Melonite Treated Interior & Exterior Bore
Caliber	9mm Luger (9x19mm)
Twist Rate	1:10 Twist
Operating System	Direct Blowback (Gas-less operation, no gas block or tube required)
Muzzle Device Component	Standard 1/2x28 Thread Pitch, Enlarged to 9mm, A2 Birdcage Flash Hider with Crush Washer Pre-Installed
Handguard Rail	12 Inch Slim Profile Free-Float Aluminum Handguard, Continuous Top Picatinny Alignment, Modular M-LOK Attachment Points
Lower Receiver Parts Kit (LPK)	Complete Mil-Spec Spring and Pin Kit, Polished Single-Stage Hammer and Trigger Assembly, Standard A2 Pistol Grip
Carbine Buffer Stock Extension	Adjustable 6-Position M4 Stock, Mil-Spec Diameter Buffer Tube, Specialized Heavy 8oz PCC Buffer, and High-Tensile Carbine Buffer Spring
Manufacturing Origin	100% Assembled and Quality Checked in the USA with Pro2A Tactical Lifetime Factory Warranty

Why Buy This Product?

Piecing together a 9mm AR-15 from separate parts often exposes builders to frustrating cycling, extraction, or trigger resetting issues due to incorrect buffer weights and mismatched bolt geometry. The PRO2A 16" 9mm Upper Kit eliminates these hurdles out of the box. Every component in this master conversion package—from the pre-headspaced ramped blowback bolt group to the lower receiver internal hardware and specialized heavy PCC buffer—is meticulously curated by expert armorers to cycle reliably as a unified system. It offers competitive steel-challenge shooters, plinkers, and home-defense advocates a soft-shooting, full-sized carbine build that utilizes affordable handgun ammunition without charging custom hardware premiums.