Centennial Defense Systems Discount Codes – Verified Deals & Offers | September 2026

Consistent quality, returning customer

This was my third order from Centennial Defense Systems. I previously bought a Glock Slide Parts Kit and a Magwell. This time, I grabbed a Glock Connector and a Pin Punch Set. Just like before, everything was exactly as described and worked perfectly. Their parts have always been reliable for my builds, which is why I keep coming back. Shipping was also consistent with previous experiences, arriving in about a week.

Decent value on parts

I was looking for a good deal on a Glock Frame Parts Kit and saw Centennial Defense Systems had one at a competitive price. I kept an eye out for any sales and managed to snag it during a small holiday promotion, saving me a bit. Shipping cost wasn't outrageous, which I appreciate since some places really stick it to you. The kit arrived as expected. All the parts seemed fine and fit well in my build. For the price I paid, it felt like a solid purchase.

Got my new sights, all good

Needed some new Fiber Optic Sights for my Glock. Found them here, price seemed fine. Ordering was pretty easy, just a few clicks. They showed up in the mail quick enough. Put 'em on and they look good, bright enough. Happy with how it turned out.

Absolutely awesome upgrade!

I just got the Glock Threaded Barrel and a Compensator, and wow, what a difference! The fit and finish are top-notch. My range sessions are so much more enjoyable now, recoil is noticeably reduced. I can't wait to try more of their stuff. I'm telling everyone I shoot with about Centennial Defense Systems!

Smooth order, good quality parts

I ordered a Glock Stainless Steel Guide Rod Assembly and a Glock Extended Slide Release. The website was easy to navigate, and the checkout process was quick. Shipping took about 5 days to reach Denver, which was reasonable. The parts arrived well-packaged. Installation was straightforward for both. The guide rod felt solid, and the slide release has a positive feel, a definite upgrade from stock. I had a question about compatibility with my specific Glock model before buying, and their customer service responded within a few hours with helpful info.