POF-USA P415 Complete Upper (Piston) — 300 Blackout, 10.5" Black Nitride Barrel, 9" M-LOK Handguard, Black Anodized Receiver
Manufacturer: Patriot Ordnance Factory (POF-USA) • Model #: 01515 • UPC: 847313015150
Caliber: 300 AAC Blackout • Operating System: Regulated short-stroke gas piston (piston-driven)
Barrel: 10.50" Black Nitride (QPQ) • Receiver: Aluminum, Black Anodized • Handguard: 9" Free-Float M-LOK
Build a compact, suppressor-friendly powerhouse with the POF-USA P415 Piston Complete Upper in 300 Blackout. Anchored by a 10.5" black-nitride barrel and a rigid 9" free-float M-LOK handguard, this upper leverages POF’s regulated short-stroke gas piston system to deliver clean operation, reduced fouling in the receiver, and reliable cycling with a wide range of subsonic and supersonic loads. The black-anodized aluminum upper receiver mates precisely with Mil-Spec lowers, while the free-float rail gives you abundant M-LOK real estate for lights, lasers, and sling mounts.
Why Choose the P415 Piston Upper in 300 BLK
Cleaner, Cooler Running: The piston transfers heat and fouling forward, helping keep the bolt carrier and receiver cleaner—ideal for high round counts and suppressed use.
Tunable, Regulated Gas: Dial the system to your ammunition and environment to minimize blowback and optimize reliability with subsonic or supersonic 300 BLK.
Black Nitride Barrel Durability: QPQ treatment hardens the bore and exterior for corrosion resistance, easy cleaning, and consistent accuracy.
Compact, Purpose-Built Length: The 10.5" profile balances maneuverability with practical ballistic performance—perfect for vehicles, tight interiors, and can hosts.
Free-Float M-LOK Rail: The 9" rail isolates barrel harmonics for repeatable zero and offers flexible accessory placement without adding bulk.
POF-USA Quality: Precision machining, tight tolerances, and rugged finishes from a proven American manufacturer.
Key Features at a Glance
Caliber: 300 AAC Blackout (optimized for sub/supersonic loads; suppressor use where legal)
Barrel: 10.50", black nitride (QPQ), threaded 5/8×24 for common 30-cal muzzle devices*
Operating System: Regulated short-stroke gas piston, user-adjustable
Handguard: 9" free-float M-LOK with anti-rotation interface at the receiver
Upper Receiver: Aluminum, black anodized (low-glare, corrosion-resistant)
Finish: Black throughout for a sleek, durable, duty-ready look
Compatibility: Standard AR-15 pattern lowers (Mil-Spec geometry)
*Always verify the included muzzle device (if any) and thread spec with your retailer’s listing.
Real-World Performance Benefits
Suppressed Confidence: Piston regulation helps tune out excess gas and reduces carbon blowback—especially valuable on subsonic, can-equipped setups.
Reliable Cycling Range: From quiet, heavy-bullet subs to high-energy supers, the adjustable piston broadens functional ammo windows.
Consistent Zero, Easier Maintenance: Free-float rail preserves POI under sling/barricade pressure; piston system simplifies cleaning after long range days.
Ideal Use Cases
Home & Defensive Builds: Compact handling and tunable gas for smooth, controllable recoil management.
Suppressed SBR/PDW Configurations: Threaded muzzle and piston tuning play well with suppressors (observe all laws).
Training & Practical Competition: Fast transitions, reduced fouling, and robust rail space for modern accessories.
Technical Specifications
Manufacturer: Patriot Ordnance Factory (POF-USA)
Model #: 01515
UPC: 847313015150
Caliber: 300 AAC Blackout
Barrel Length: 10.50", black nitride (QPQ), threaded 5/8×24
Operating System: Piston-driven, regulated short-stroke, adjustable
Gas Block: Low-profile, piston regulator (adjustable)
Handguard: 9" M-LOK, free-float
Upper Receiver: Aluminum, black anodized
Twist Rate: Optimized for common 300 BLK loads (check current production spec)
Overall Length/Weight: Varies slightly by lot and included components
(Minor variations can occur between production runs; verify the specifics of your unit.)
What’s Included*
POF-USA P415 Piston Complete Upper (300 BLK)
9" Free-Float M-LOK Handguard installed
Adjustable Piston System with regulator
Barrel nut and rail hardware installed
*BCG, charging handle, and muzzle device may be included or optional depending on retailer—confirm package contents.
Setup & Tuning Tips
Mate to a Mil-Spec AR-15 lower with standard takedown/pivot pins.
Add a quality BCG and charging handle if not included; lubricate per manufacturer guidance.
Muzzle Device: Time/torque your brake, flash hider, or suppressor mount with proper shims/crush washer.
Adjust the Gas: Start more open for reliability, then close gradually to reduce recoil/blowback while maintaining last-round lock-back—with both sub and super loads (and with your suppressor, if used).
Document your settings for each ammo type and suppressed/unsuppressed configuration for quick repeatability.
Maintenance & Care
Clean & Lube: Piston systems run cleaner at the carrier, but carbon still builds at the gas block and piston—inspect and clean regularly.
Verify Fasteners: Re-check handguard screws, regulator set screws, and muzzle device torque after heat cycles.
Barrel Care: Nitride bores clean quickly—avoid over-aggressive abrasives; use quality solvent and patches.
Compliance & Legal Notes
Attaching a 10.5" upper to a rifle lower may create a Short-Barreled Rifle (SBR) under federal/state law.
Ensure compliance with NFA/ATF regulations and all local laws regarding barrel length, overall length, and brace/stock configurations before assembly.
Follow all safe handling and transport requirements for your jurisdiction.
SEO-Optimized Keywords & Phrases
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Short Meta Description
POF-USA P415 Piston Complete Upper (01515)—300 Blackout, 10.5" black-nitride barrel, 9" M-LOK handguard, and adjustable short-stroke gas piston on a black-anodized receiver. Compact, clean-running, and suppressor-friendly. UPC: 847313015150.
Buyer’s Quick Checklist
✅ Want a piston-driven 300 BLK upper for cleaner, tunable operation
✅ Prefer a 10.5" black-nitride barrel for durability and easy cleaning
✅ Need a 9" free-float M-LOK for lights, lasers, and sling points
✅ Have (or will add) a quality BCG/charging handle
✅ Understand SBR/NFA compliance before assembly
Run quieter, cleaner, and more reliably with the POF-USA P415 Piston Complete Upper—the compact 300 BLK solution that’s built to perform when it matters most.
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