For my initial post, i bring you my JG BAR-10 upgrade kit.
POWER & DURABILITY PACKAGE

The package includes:
1 - metal piston with polyurethane piston seal, anodized alloy body, teflon ring insert and stainless steel base
1 - hardened steel trigger sear
1 - hardened steel piston sear
1 - metal spring guide rod
1 - SP01 525 fps spring or SP02 585 fps spring

ACCURACY PACKAGE (+20fps)

Tight Bull Barrel using HIGH SPEED Brass (used in air rifles/pistols), 6.01mm ID, 9.6mm OD, 435mm length with crater cut, crowned lip and the internal is polished to a mirror finish.

TRIGGER PARTS / SEAR SET
Piston & Trigger Sear. Machined to exact specifications and hardened for guaranteed durability.

The upgrade kits are also available for the following: UTG MK96 (Warrior 1 L96), MP001, UTG M324 (DE M50) and other Airsoft Sniper Rifles.
More pics are available here
Please send me an e-mail or hit the comments section for pricing and availability.
Happy shooting!!!