Builder Tools
Interactive calculators and decision engines to help you tune, zero, and optimize your rifle without the guesswork.
Buffer Weight Calculator
Input your barrel length, gas system, and ammo type to get the exact buffer weight recommendation for reliable cycling.
Gas System Troubleshooter
Step-by-step diagnostic wizard to identify and fix cycling issues, failures to eject, double feeds, and other gas-related problems.
Ejection Pattern Analyzer
Diagnose overgassing or undergassing issues by matching your brass ejection angle to the clock-face chart.
Barrel Range Visualizer
Compare effective ranges and velocity drops for different barrel lengths (10.3" to 20") across multiple ammo types to match your mission.
Ballistics Calculator
Calculate bullet drop, wind drift, and trajectory from 0-1000 yards. Supports preset ammo profiles and custom BC/velocity entry with environmental corrections.
Zero Distance Visualizer
Compare trajectory curves for 36/300, 50/200, and 100-yard zeros to understand point-of-impact at any distance up to 400 yards.
Offset Zero Calculator
Calculate required point-of-impact offset for different zero distances (36/50/100/200 yards) at your chosen range distance.
Zeroing Click Calculator
Convert your point-of-impact deviation (inches) into exact turret clicks (MOA/MRAD) for any target distance.
Optic Selection Wizard
Answer questions about your engagement range, astigmatism, and night vision needs to get a personalized optic recommendation.
Rate of Fire (ROF) Calculator
Analyze burst RPM, shot spacing, and timing from audio or video clips. Great for measuring your rifle's performance or comparing buffer setups.
Lower Receiver Compatibility Checker
Search 45+ manufacturers to see if your lower receiver's fire control pocket is compatible with Super Safeties (M16 vs Low Shelf vs High Shelf).
Need a full build plan?
Start a new build in the Configurator to get a complete compatibility check and parts list for your mission.
Launch Configurator