電子トリガー(EFCS)搭載、シングルセレクターM4 AEG向け。ガス/CO2/圧縮エア対応、推奨圧4-12BAR。比較的安価で組み込みやすい。他社製への組み込みには調整が必要な場合も。

A little disappointed that mine came with a normal trigger and not the one in the picture, also it's only for single selector con versions. I cant seem to find a dual selector gearbox shell to swap it out.
Put it in an Ares mutant, very easy to do.
Worth the money but its not perfect compared to an engine that costs 4x as much.

For the installation, I would say it is quite easy, 9/10
For the usage, using 11.1V battery, under 90PSI 0.8 J power, the performance goes satisfactory, 7/10 presure goes down quickly while using fullauto
For the QC of the gearbox, 7/10, one small defect is the air inlet between the tank connection is a bit week, need exyra tape to fix the inlet

The dropin is easy to install, cheap and works without issue. Battery ain't a issue cause I used a adapter for one of my aeg deans batteries. This drop in helped me create one of my cheapest ( and most fun) hPa Projects yet

This HPA Kit works and fits perfectly into the Ares Am 013 and AR 308. The Installation ist pretty easy so everyone could get IT into the Airsoft Gun. ITS a cheap and IT works perfectly.