SP90 AEG Tune Up SpringDetails Spring force: 5. 77 kg Weight: 14 g Shipping weight: 17 g Guarder Guarder is one of the most proven spare parts company in the airsoft community. Their famous, high quality products, such as springs, hop up rubbers, barrels, motors, gears and cylinder sets are the choice of many airsofters. Guarder wide product line contains even conversion setups for your plastic airsoft pistol to change it into a metal one.

TPA: 11 Weight: 150 g Shipping weight: 170 g

and a total length of 222mm

Weight: 50 g Shipping weight: 90 g

the valve maintenance capsules are filled with 0

This thumb break model provides full gun length protection

Caliber: 6mm Weight: 360 g Shipping weight: 420 g

Weight: 40 g Shipping weight: 70 g

Weight: 260 g Shipping weight: 290 g

Weight: 90 g Shipping weight: 140 g

8 mm Weight: 25 g Shipping weight: 36 g

Magazine capacity: 440 rds Weight: 220 g Shipping weight: 250 g

It has also been optimized for use with the "thumb break method" of shooting as taught by Magpul DynamicsSM