Articles / Blog
Explore the latest news, detailed guides and comparisons on Airsoft, HPA and technology.
Recent articles
Adjustable Hop-Up: the Problem US 11,859,940 Tried to Solve
The adjustable tension sleeve hop-up patent (Lort, 2024) explained simply: tolerances, double feed and midcap syndrome, with the official link.
GATE Pulsar Patents: What They Do and Don't Say About Your Kits
GATE patent families (PL 449544 A1 and EP 4 696 975 A1) explained for makers: pneumatic shot separation, territories, and what they mean for your builds.
How to Read an HPA Patent: A Practical Guide for Makers
A step-by-step method for reading HPA airsoft patent drawings and claims, with real examples and links to official registers.
What an HPA Nozzle Patent Actually Protects
Polarstar's US 10,401,121 patent and the nozzle-BB sealing problem in HPA explained in plain words, without claiming our kits implement the invention.
The Evolution of the ICS Upper: From the Classic Version to the MXP System
Discover how the ICS upper has evolved from the classic version to the new MXP, featuring blowback, a sliding window, and a real AR15-style opening.
Silent Industries Alpha Hop-Up: Differences Between Versions and Compatible Kits
Discover the differences between the previous Silent Industries Alpha and the 2026 version, how its design has changed, and why the compatible kit is not the same.
First M4 lower made of pressed carbon fiber: experiment, weight, and lessons learned
First experiment with an M4 lower made of pressed carbon fiber: 3D design, epoxy resin, grip inserts, and a weight comparison with the original part.
Retro Arms: Differences Between Versions and How to Identify Yours
Discover the differences between the Basic, CNC Ultra, and V2 versions: color, physical features, price, and which HPA kit you need for each one.
Difference between kit versions
Detailed comparison of the three versions of HPA kits for airsoft: V1, V2, and V2.1. Discover the differences in design, installation, stability, and more.
Polarstar F2 Nozzle: Length Guide, Compatibility by Model, and How to Order a Custom Fit
Complete Guide to Nozzles for the Polarstar F2: Length Chart by Model, Calculation Formula, and How to Order a Custom Nozzle if Your Size Is Not in Production.
MAXX Model Hop-Up: Differences Between Models, Versions, and Compatibility with HPA Kits
Complete Guide to MAXX Model Guns: Differences from Clones, Compatibility Chart by Replica, and Why You No Longer Need Springs or O-Rings with an HPA Kit.