Novritsch 13mm FPS Adjuster Rings AEG / HPA Inner Barrels This LiPo-guard is a fireproof

This LiPo-guard is a fireproof bag

Use for disassembling magazine valves of gas blowback GBB

Industry standard Low mount and 1/3 Co-witness mount included

Parallax-free with unlimited eye relief

Novritsch 13mm FPS Adjuster Rings AEG / HPA Inner Barrels This LiPo-guard is a fireproofIncrease the fps power of your rifle exactly to the legal limit of your field with the fps adjuster rings. You can put them on the spring guide to adjust the muzzle velocity of your sniper rifle. The rings are machined by CNC and the material used is a hardened stainless steel. Compatible with all 13mm spring sniper rifles (Novritsch SSG24, Silverback SRS etc.) One set includes: 2mm long ring + 4mm long ring + 6mm long ring Outer diameter: 13mm Inner