Sinner Mass Fabrications - San Antonio

Sinner Mass Fabrications is San Antonio's premier destination for custom firearms, expert gunsmithing, and specialized firearm finishes. As a proud veteran-owned and operated small business, we are dedicated to providing exceptional service and craftsmanship to both seasoned enthusiasts and first-time buyers. Our extensive services include professional Cerakote and Gun Candy applications, precision stippling and frame modifications, and luxurious PVD Gold TiNing/coating to personalize your firearms. Our skilled gunsmiths handle everything from barrel threading and trigger work to recoil padding installation, scope mounting, deep cleaning for all firearm types, and rifle bedding. We offer a curated selection of ready-to-ship custom firearms and a comprehensive inventory of parts and accessories, including magazines, slides, triggers, frames, sights, and barrels. Sinner Mass Fabrications is also a licensed 07 FFL/SOT dealer, facilitating all incoming and outgoing FFL transfers, including those for suppressors and Short-Barreled Rifles (SBRs). We proudly stock major gun brands, and all firearms purchased from us come with a lifetime replacement guarantee. Beyond sales and customization, we provide laser engraving services for firearms, tumblers, and other items, along with exclusive deals and clearance items. Our unique "Build-A-Glock" program allows customers to design their ideal custom Glock from the ground up, choosing every detail from slide enhancements and barrel modifications to triggers, sights, and grip textures. We are committed to upholding the highest standards of quality, compliance, and customer satisfaction, ensuring a professional and responsible approach to all firearm-related services. Visit us in San Antonio for a truly personalized firearms experience.