Best for: Players wanting compact, Tournament, PE fans
Setup & First-Day Tuning Guide
Charge Batteries 24 Hours Before — Charge the Planet Eclipse CS1.5's battery fully before your first session. Bring a spare — a low battery causes dump-fire and board errors that mimic broken gun symptoms.
Lube Bolt & Carrier Before Air — Slide the bolt back by hand — it should move freely. Apply Dow 33 to all bolt and carrier O-rings. Never lube the solenoid.
Set Operating Pressure to Spec — The Planet Eclipse CS1.5 runs at ~135 psi. Set your HPR per the manual — never exceed rated pressure.
Chronograph via HPR, Then Dwell — With eyes ON, fire 5 shots and read the chrono. Adjust HPR to approach your target velocity (usually 280 fps). Change dwell (1ms at a time) only after HPR is dialed.
Keep Anti-Chop Eyes ON — Turn eyes ON for your first outing. A slight hesitation is normal — a force-feed loader (Dye Rotor, Virtue Spire) eliminates it entirely.
Set Firing Mode Before the Field — Set the gun to semi-auto mode. Most recreational fields enforce semi-auto — confirm mode is correct before your first game.
Maintenance Schedule
Interval
Task
Detail
After every outing
Barrel, bolt & exterior clean
Squeegee twice, bolt wipe, screws snug. Clean eye ports with a dry cotton swab.
Every 5 sessions
Bolt O-ring lube & cup seal check
Clean with isopropyl, dry, apply Dow 33. Inspect cup seal — replace if deformed.
Every 6 months
Valve & fitting service
Re-lube all O-rings. Check all fittings and inline regulator if present.
Annually
Full teardown & O-ring replacement
Complete disassembly, full O-ring kit replacement, inspect springs.
Tool-less Gamma Core service.
Common Problems & Troubleshooting
Wide velocity spread
Cause: Worn bolt O-rings (most common); LPR drift
Fix: Bolt carrier O-ring wear is the #1 cause of inconsistency in guns like the Planet Eclipse CS1.5. Remove bolt, inspect O-rings, re-lube or replace as a set.
Gun won't power on
Cause: Low battery voltage; terminal corrosion
Fix: Test battery — should read 9V+ (alkaline) or 7.4V+ (LiPo). Clean terminals with isopropyl. Check the manual for the factory reset sequence.
Air dumps continuously
Cause: Solenoid failure; low battery
Fix: De-gas immediately. Check battery first — low voltage causes dump-fire. If battery is good, inspect solenoid for debris or O-ring failure.
Double-firing / bounce
Cause: Dwell too high; debounce too sensitive
Fix: Reduce dwell 1ms at a time until resolved. Never go below 4ms on spool guns.
Eyes not working with eyes on
Cause: Paint residue blocking eye ports
Fix: Clean eye ports with a dry cotton swab — this fixes 95% of apparent eye failures.
Firing mode won't change
Cause: Board lock mode
Fix: Download the board manual PDF — the unlock sequence is a button-hold pattern during power-on.
Upgrade Path
Barrel
Trigger
Regulator
Frequently Asked Questions
Is the Planet Eclipse CS1.5 good for beginners?
The Planet Eclipse CS1.5 has complex internals and is best for players who've already completed at least one season.
Does the Planet Eclipse CS1.5 run on CO2 or HPA?
Compatible with HPA. HPA is required — CO2 can damage solenoid O-rings on electropneumatic guns.
What is the operating pressure of the Planet Eclipse CS1.5?
The Planet Eclipse CS1.5 operates at ~135 psi. Match your regulator output to this spec.
How hard is the Planet Eclipse CS1.5 to maintain?
Easy — basic bolt cleaning every few sessions. Tool-less Gamma Core service.
What loader does the Planet Eclipse CS1.5 need?
A force-feed loader (Dye Rotor, Virtue Spire) is needed for the Planet Eclipse CS1.5's fire rate. A gravity hopper limits you to ~6 BPS.
How much does the Planet Eclipse CS1.5 cost?
New: $N/A MSRP, typically $500-700 (used) on the street. Used prices vary — check BST forums and eBay for current asking prices.
What barrel thread does the Planet Eclipse CS1.5 use?
The Planet Eclipse CS1.5 shoots .68 caliber. Confirm the specific thread pattern for your variant before ordering a barrel.
What firing modes does the Planet Eclipse CS1.5 support?
2 lbs unloaded. With a full hopper and HPA tank, expect roughly 4.5–5.5 lbs total.
Is the Planet Eclipse CS1.5 worth buying?
A compact Gamma Core gun bridging the Geo and CS lines, beloved for its small profile and reliability. Strengths: Small, light flagship, Very reliable. Trade-offs: Superseded by CS2/CS3, Used only.