Griffin Armament 3-Lug — 9mm Luger, 1/2"-28 tpi — 17-4 Stainless Steel, Black Melonite / QPQ | 3L1228 (UPC 791154081983)
Upgrade the muzzle of your 9mm pistol or rimfire build with the Griffin Armament 3-Lug (3L1228) — a precision-machined, purpose-built 3-lug mount engineered for repeatable alignment, rugged service life, and secure lockup. Machined from 17-4 stainless steel and finished in durable Black Melonite / QPQ, this 3-lug adapter combines corrosion resistance, strength, and tight tolerances so your suppressor or muzzle device seats concentrically every time. Built for shooters who demand reliability and accuracy from the muzzle forward, the 3L1228 is a small part that makes a big difference.
Why the Griffin 3-Lug Mount Matters
When you run a suppressor or quick-attach device, concentricity and repeatable lockup are critical. Misalignment can cause baffle strikes, poor accuracy, and inconsistent point-of-impact. Griffin Armament’s 3-lug mount solves that by providing:
Precision concentric fit to minimize bore offset and risk of baffle strike.
Repeatable, rock-solid lockup for consistent point-of-impact from shot to shot.
Robust metallurgy that resists deformation under repeated use.
This part is ideal for competition, training, or any shooter who wants trusted performance when attaching muzzle devices or suppressors to 9mm platforms.
Key Features & Specifications
Model: Griffin Armament 3-Lug (3L1228)
Caliber: 9mm Luger (.380 / rimfire compatibility depends on specific host and suppressor)
Threads: 1/2"-28 tpi (standard 9mm thread pitch)
Material: 17-4 stainless steel (high strength, corrosion resistant)
Finish: Black Melonite / QPQ for increased surface hardness and wear resistance
Design: 3-lug quick-attach taper mount geometry for secure, repeatable engagement
Length / Profile: Compact, low-profile footprint (verify clearance for your suppressor/host)
UPC: 791154081983
Performance Benefits
Reduced muzzle rise & better control: When paired with matched muzzle devices, the mount helps maintain consistent point-of-impact and faster follow-ups.
Low visible signature: Black Melonite finish reduces glare and blends with most builds.
Durability: 17-4 stainless resists corrosion and wear from frequent attachment/removal cycles.
Engineered concentricity: Tight tolerances mean fewer alignment issues and longer suppressor life.
Compatible Uses
Quick-attach style suppressors and muzzle devices that accept a 3-lug taper mount.
9mm pistols and carbines with barrels threaded 1/2"-28 tpi.
Rimfire builds that use the 1/2"-28 standard (confirm compatibility with your specific suppressor).
Always verify your barrel threading, shoulder length, and suppressor clearance before purchasing or installing—fitment can vary by manufacturer and platform.
Installation & Best Practices
Confirm thread pitch: Ensure your barrel is threaded 1/2"-28 tpi and the mount’s shoulder geometry matches your suppressor or device.
Hand-start threads: Cross-threading is the most common installation mistake—thread the mount by hand before using tools.
Torque to spec: Use the manufacturer-recommended torque value or a properly sized wrench on the flats; avoid over-torquing.
Use proper retention method: If your suppressor system calls for a locking collar, crush washer, or thread locker, follow the suppressor manufacturer’s guidance.
Check bore clearance: After installation, check for baffle contact using a bore sight or dry-fire inspection at a safe range before live fire.
Run a proof series: Start with a short string of shots, then re-inspect for proper alignment and tightness.
Care & Maintenance
Wipe clean after use with a cloth; remove carbon and debris from threads with a soft brush.
Avoid corrosive cleaners—mild solvent and light lubrication on mating threads is sufficient.
Periodically inspect for thread wear, burrs, or deformation; replace if any damage is found.
Store in a dry environment when not in use.
Safety & Legal Notes
Muzzle devices and suppressor mounts are subject to federal, state, and local laws. Before purchasing or using the Griffin 3-Lug mount, ensure compliance with all applicable regulations in your jurisdiction. Only install and use muzzle devices in accordance with manufacturer instructions and safe firearm handling practices.
Why Choose Griffin Armament
Griffin Armament is known for exacting tolerances and suppressed-firearm engineering. The 3L1228 3-Lug Mount carries that reputation into a compact, high-quality component designed to protect your suppressor investment and improve on-gun performance. If you want reliable lockup, precision concentricity, and a finish that endures the elements, this Griffin 3-lug mount is built to deliver.
Summary — At a Glance
OEM-grade 3-lug taper mount for 9mm platforms.
1/2"-28 tpi for wide compatibility with 9mm silencers and devices.
17-4 stainless + Black Melonite/QPQ finish for strength and corrosion resistance.
Precision machining for repeatable, concentric lockup and longer suppressor life.
Model: 3L1228 — UPC 791154081983.
Equip your 9mm build with a mount that protects your can, preserves accuracy, and stands up to hard use — the Griffin Armament 3-Lug 3L1228.
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