Description
Ares CO2 Bolt Action Conversion Kit (TX System – TX-CO2-001)
The Ares TX-CO2-001 is a CO2 conversion bolt for Ares TX System bolt-action sniper rifles, such as the MS338 and MS700. It replaces the spring-cocking set-up so the rifle is powered by a 12g CO2 caplet held in the bolt.
Ares is a Hong Kong maker known for innovative designs, and the TX System is its modular sniper rifle platform. This kit gives TX owners another way to run their rifle, with a gas-powered bolt that does not need a heavy spring to be compressed on each shot.
How it works
The 12g CO2 caplet loads into the bolt, which is then reinstalled in the rifle. Retailer listings rate it at over 100 shots per caplet. Working the bolt is lighter than cocking a strong spring, which some players find helps them stay steady on target between shots.
The kit is supplied with an M130 spring, and the bolt is made from stainless steel parts.
Installation
Fitting the bolt requires some basic gunsmithing knowledge. If you have not upgraded a rifle before, it is sensible to have an experienced technician fit it. Always chronograph the rifle after any change to its power system and before playing.
On the field
As with any gas system, CO2 performance changes with temperature. Carry spare caplets, keep them out of direct sunlight, and check your rifle’s behaviour at the start of each game day.
Key features
- CO2 conversion for Ares TX System rifles
- Code TX-CO2-001
- 12g CO2 caplet held in the bolt
- Over 100 shots per caplet (retailer rating)
- Stainless steel construction
- Supplied with an M130 spring
- Black finish
What’s in the box
- CO2 conversion bolt
- M130 spring
Compatibility
Designed for Ares TX System bolt-action rifles such as the MS338 and MS700. Please confirm your rifle is a TX System model before ordering.
Care and maintenance
Remove the caplet after each game, keep the bolt clean and lightly lubricated with silicone oil on the seals, and store the rifle in a dry case. Never expose CO2 caplets to heat.
Who is it for?
For Ares TX System owners who want to try CO2 power in their bolt-action rifle and are comfortable fitting the kit or having it fitted.
Please note: 12g CO2 caplets and the rifle are not included. Always wear suitable eye protection when shooting.









