Classic Army Cylinder Head for M4A1 and all M15 series AEG's. Compatible with other brands as well.

MODIFY AUG CYLINDER SET W/ BRASS CYLINDER, SS CYLINDER, ASN, POLY PISTON AND HEAD

This bore-up cylinder set will allow an increase of airflow inside your gearbox, which results in a higher velocity with NO extra stress on your gearbox.

This bore-up cylinder set will allow an increase of airflow inside your gearbox, which results in a higher velocity with NO extra stress on your gearbox.

M110 Spring Cylinder upgrade for the Sytema M4 series PTW or Codename: MAX type airsoft rifles. Recommended for use with Systema's 7.2V 2400mAh PTW battery.

M130 Spring Cylinder upgrade for the Sytema M4 series PTW or Codename: MAX type airsoft rifles. Recommended for use with Systema's 9.6V 1700mAh PTW battery.

The ICS Olympic Arms M120 Power Up Kit is a bore-up kit for your ICS M4 and M16 style airsoft rifles.  This kit includes everything you need to built an upgraded upper for your ICS rifle.  It contains the upper gearbox (MA34), an M120 spring (MC39), metal spring guide (MA46), tappet plate & spring (MA50), bolt (MP23), oversized piston head (MC56), aluminum piston (MC05), oversize 4-port cylinder (MC58).

Systema Area 1000 Version 2 cylinder head replacement.

Systema Area 1000 Version 3 cylinder head replacement.

Systema Area 1000 Teflon Cylinder for M16/M4 series guns.  (no air holes)