CYA Supply Co. Base IWB Concealed Carry Holster - Slim, Adjustable Fit

In this review the CYA Supply Co. Base IWB Concealed Carry Holster is evaluated for everyday concealed carry with a Mossberg MC1sc. The bottom line: this is a practical, American-made inside-the-waistband holster for right-hand draw users who want secure retention, a low-profile carbon fiber style look and precise fit without optic or light/laser attachments. It stands out because of its CNC-milled, CAD-derived mold and audible Posi-Click retention that together deliver consistent draw and secure carry for daily use.

Key Features

• Made in USA: Built domestically to ensure consistent quality and backed by a lifetime warranty and a straightforward return policy.
• Precision fit: Molded from CAD designs milled in-house on a CNC for a tight, repeatable fit tailored to the Mossberg MC1sc.
• Boltaron construction:.08' thickness Boltaron material provides a rigid shell that retains shape while resisting sweat and wear.
• Adjustable carry: Retention pressure and carry angle are adjustable from 0-15 degrees, allowing users to fine-tune draw feel and concealment posture.
• Posi-Click retention: Audible lock system secures the pistol in place while the full-length sweat guard protects the slide from moisture.
• Durable hardware: Stainless steel black powder coat hardware and a 1.5' wide belt clip promise a secure attachment to typical belts.

Who It's For

This holster is best for Mossberg MC1sc owners who carry inside the waistband and prioritize a precise OEM-like fit, durable construction and adjustable retention. Right-hand appendix or strong-side IWB carriers who do not use weapon-mounted optics, lights or lasers will gain the most from this design.

Those who need compatibility with optics, lights, lasers, or left-hand draw should look elsewhere. Also, users seeking a soft or fully padded concealment option may prefer leather or kydex hybrids, since this is a rigid Boltaron shell focused on secure retention and a slim profile.

Pros & Cons

Pros

• Excellent retention with the Posi-Click audible lock and adjustable tension for personalized draw pressure.
• CNC precision molding yields a consistent, snug fit that customers report feels comparable to higher-priced holsters.
• Durable.08' Boltaron build, full-length sweat guard and stainless hardware reinforce long-term use and protection against moisture.
• Slim, carbon fiber style appearance that customers like for a clean, low-profile carry look.

Cons

• Not compatible with optics or light/laser attachments, limiting use to unmodified pistols.
• Right-hand draw only, so left-handed users cannot use this model.

Specifications

Material	.08' Boltaron plastic
Fit	Mossberg MC1sc (optic not compatible)
Carry Style	IWB - Inside the Waistband (right hand draw only)
Adjustability	Retention pressure and cant adjustable 0-15 degrees
Belt Clip	1.5' wide clip
Hardware	All stainless steel with black powder coat
Special Features	Posi-Click audible retention lock, full-length sweat guard

Our Verdict

The CYA Supply Co. Base IWB holster is a solid value for Mossberg MC1sc owners who want a tight, American-made IWB option with adjustable retention and a slim appearance. It is especially worthwhile for right-hand carriers who do not run optics or weapon lights, offering durable materials, precise fitment and a reliable audible lock system backed by a lifetime warranty.

Frequently Asked Questions

Is this holster compatible with optics or weapon lights?
No. The holster fits the Mossberg MC1sc without optics and does not support lights or laser attachments.

Can retention and cant be adjusted?
Yes. Retention pressure and carry angle are adjustable between 0 and 15 degrees to customize draw feel and concealment.

What hand orientation is this model?
This model is manufactured for right-hand draw only.