Wilson Combat WC-15 6.5 Grendel AR Pistol with 12" Barrel & Geissele Mk14 10.5" Rail
This custom Wilson Combat WC-15 AR pistol pairs a forged Wilson Combat lower with a 12-inch 6.5 Grendel barrel and a Geissele Automatics Mk14 free-float handguard. Built on a direct-impingement system and finished in black hard-coat anodizing, it offers a compact, hard-hitting package backed by premium components, including a Sons of Liberty Gun Works NOX muzzle device and Magpul MBUS flip-up sights.
Condition
Overall Condition: Good – showing some signs of prior use and handling.
Bore Condition: Good – clean, well-maintained, minor wear marks.
Bore Rifling: Good Rifling – intact, well-defined lands and grooves.
Specific Condition Notes: The retaining clip on the dust-cover pin is missing, and there are mild scratches and scuffs on the receivers and handguard. No magazine is included.
What’s Included
- Magpul MBUS polymer flip-up front sight (FDE, installed)
- Magpul MBUS polymer flip-up rear sight (FDE, installed)
The foundation of this build is a Wilson Combat forged 7075-T6 lower receiver marked “WILSON COMBAT CAL. MULTI” and bearing the Wilson eagle crest. The matching upper keeps the profile sleek while hosting a 12-inch chrome-moly steel barrel chambered in 6.5 Grendel. The barrel is threaded 5/8-24 and sports 5R rifling with a fast 1:7 twist for reliable bullet stabilization.
A Geissele Automatics Mk14 10.5-inch free-float handguard, machined from 6061-T6 aluminum, provides M-LOK slots and a numbered top rail for secure accessory placement. The handguard’s slim profile complements the pistol-length receiver extension, making the firearm easy to maneuver in tight spaces.
Gas is regulated by a low-profile Yankee Hill Machine gas block, feeding the direct-impingement system. At the muzzle, a Sons of Liberty Gun Works NOX 7.62 device offers flash suppression and QD‐mount compatibility while matching the barrel’s thread pattern.
Controls include an aftermarket curved bright trigger shoe that adds visual contrast and a consistent pull. A Magpul MOE-type polymer grip rounds out the lower, giving the shooter a comfortable, textured hold.