CYMA M24 / L96 AWF Sniper VMP Piston with Spring Guide - Red

EPeS VMP Piston with Spring Guide – Adjustable Performance for Bolt-Action Sniper Rifles

Looking for precision upgrade parts to boost the performance and accuracy of your bolt-action sniper rifle? Need quick and repeatable tuning of piston weight to optimize your rifle for specific BB weights? Then this EPeS Sniper upgrade set with VMP piston is exactly what you need. The set includes a CNC Variable Mass Piston, a CNC spring guide with bearing and spacer sleeve, precision piston guide rings, a CNC cylinder head with integrated Sorbopad, and a set of tuning weights (5 red, 5 silver). Thanks to the slip-on weights (not threaded), adjustments are faster and more user-friendly. Correct piston weight adjustment to match the cylinder volume and BB mass provides a quieter shot, longer range, and better consistency with heavier BBs (Joule creep effect). Note: this is not a plug-and-play upgrade – proper installation requires knowledge of bolt-action airsoft mechanics and careful tuning.

Recommended Piston Weight Tuning Process

1. Select the target BB weight you want to optimize for (e.g. 0.43 g, 0.49 g).
2. Test different weight combinations from lightest to heaviest and note total piston weight.
3. For each combination, fire 3–5 shots, record average energy (Joule), and note sound levels.
4. Choose the combination that delivers the highest energy with the lowest deviation and acceptable noise.
5. Verify results in the field with proper hop-up adjustment.