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Optimize your short-barreled rifle or AR pistol build with the low-concussion PRO2A 10.5" 5.56 NATO Carbine Length Melonite Upper Kit with Flash Can. This 100% American-made master build bundle contains every critical component required to transform a standard stripped lower receiver into a reliable close-quarters asset. Engineered for peak functionality, the package pairs a rugged 4150 CMV steel barrel and an integrated linear flash can with a pre-headspaced M16 bolt carrier group, a full lower parts kit (LPK), and a matching pistol buffer tube extension assembly to provide immediate mechanical synergy.
| Upper Receiver Assembly | Mil-Spec Forged 7075-T6 Aluminum, M4 Feed Ramps, Forward Assist & Port Cover, Type III Hardcoat Anodized Black Finish |
|---|---|
| Bolt Carrier Group | Full M16 Profile, Heavy-Duty Steel Bolt Face, Nitride/Melonite Treatment, Properly Staked Gas Key, MPI Tested |
| Charging Handle | Standard Milspec Charging Handle |
| Barrel | 10.5 Inch Profile, 4150 Chrome Moly Vanadium Steel, Medium Contour, Melonite Treated Interior & Exterior Bore |
| Caliber | 5.56x45mm NATO (Fully accepts and cycles .223 Remington ammunition safely) |
| Twist Rate | 1:7 Twist |
| Gas Operating System | Carbine-Length Gas Network, Low-Profile 4140 Steel Gas Block, Seamless Stainless Steel Gas Tube |
| Muzzle Device Component | Slimline Linear Flash Can Blast Shield, 1/2x28 Thread Pitch Arrangement |
| Handguard Rail | 12 Inch Slim Profile Free-Float Aluminum Handguard, Continuous Top Picatinny Alignment, Modular M-LOK Attachment Points |
| Lower Receiver Parts Kit | Complete Mil-Spec Spring and Pin Kit, Polished Single-Stage Hammer and Trigger Assembly, Standard A2 Pistol Grip |
| Pistol Brace | Standard Blade, AR-15 Pistol Buffer Tube, Standard 3oz Carbine Buffer, and High-Tensile Buffer Spring |
| Manufacturing Origin | 100% Assembled and Quality Checked in the USA with Pro2A Tactical Lifetime Factory Warranty |
The PRO2A 10.5" 5.56 NATO Carbine Length Upper Kit with Flash Can addresses the two largest pain points associated with short-barreled setups: severe side concussion and erratic timing. Firing 5.56 NATO rounds from short barrels yields an aggressive, loud blast that can disorient shooters at close range or in indoor training lanes. By embedding a linear flash can at the muzzle, Pro2A Tactical drives concussive energy directly away from the operator. Furthermore, selecting a carbine-length gas profile over shorter pistol networks offers a smoother cycling window with less wear on internal mechanisms.
Sourcing components from disparate manufacturers often risks tolerance stacking, which can cause feeding failures or weak extractions. This master package resolves compatibility challenges out of the box by headspacing the M16 bolt carrier group natively to the 10.5-inch Melonite barrel, aligning it precisely with the matching lower components and buffer group. Engineered with 100% American craftsmanship and protected by a full factory lifetime warranty, this comprehensive build bundle transforms your stripped receiver into a highly controllable close-quarters tool.
| SKU | P2A556GFS12CAR105CAN-TK-KIT |
|---|---|
| Barrel Length | 10.5 inch |
| Rifle Caliber | 5.56 NATO |
| Manufacturer | Pro2A Tactical |
