Business Details

Full description and what we offer

ADCO Firearms LLC operates out of Portage, Ohio as both a barrel manufacturer and full-service gunsmith shop. Founded on the principle of selling only products that have proven themselves as performers, ADCO builds relationships with industry experts to ensure quality across the board—whether you're sourcing parts for a PSD build overseas, law enforcement duty weapon, or competitive/recreational shooting.

The core business is manufacturing AR barrels in multiple calibers and configurations:

Barrel Lengths & Specs: - 5.56mm: 7.5", 10.3", 11.5", 12.5", 14.5", 16", 18", 20" - 300 Blackout: 10.3" pistol (1:8 twist) - 9mm barrels - Multiple profiles: Gov Contour, LPGB, FSB, M4, Mid-length - Pricing from $310–$389 depending on configuration

Gunsmithing Services: - Barrel threading (5.56, 9mm, 300BLK, and other calibers) - Barrel modification and repair - Contouring and custom finishes - AR15 lower receiver mods (AWB compliance, semi-auto conversions) - AR57 full-auto bolt mods - FSB install and modification - Gas block pinning - NFA engraving for suppressors and short-barreled rifles - Permanent muzzle device attachment - Muzzle device removal - Assembly and disassembly services - Testing and evaluation work

"We thread more than just AR barrels." ADCO's threading service extends to pistol calibers, larger bore sizes, and specialty applications. This is a differentiator—most shops stick to standard AR work.

ADCO stocks over 20 major manufacturers:

Category	Brands	Price Range
Optics/Sights	EoTech, Holosun, Geissele, Trijicon, Magpul BUIS	$38–$665
Weapon Lights	SureFire, Streamlight	$41–$379
Suppressors	Dead Air, SilencerCo, Rugged, Griffin Armament, HUXWRX	Call for pricing
Silencer Mounts	ASR, Bravo, Alpha, AEM, 3-lug adapters	$30–$119
Upper/Lower Parts	Bolt carrier groups, charging handles, triggers, stocks	$38–$212
Tactical Gear	B5 Systems, Blue Force Gear, Magpul, Daniel Defense	Varies

[email protected] - Direct contact for special requests, custom work, and transfers.

Physical Address: 108 Findlay Pike, Unit C Portage, OH 43451 Phone: 419-882-8079

Retail Hours: - Tuesday, Thursday, Friday: 10am–6pm - Wednesday, Saturday: 10am–2pm - Sunday & Monday: Closed

•All firearm sales are final—no returns on guns, parts, or accessories
•Non-firearm items in original, unopened packaging may be exchanged for store credit on special occasions
•ADCO does transfers for customers if they don't have something in stock
•California customers: As of December 2025, ADCO no longer accepts orders from California due to AB 1263

This isn't a retail-first operation. ADCO exists because Steve saw what works in the field—PSD work, law enforcement duty, and competitive shooting—and built a shop around those real-world demands. You get someone who understands why barrel quality matters, why thread runout matters, and why NFA engraving needs to be done right. The gunsmithing menu is extensive enough to handle serious builds, and the parts selection reflects actual shooter needs, not just fill-in-the-catalog thinking.