Guarder SR-16 BoreUp Full Gearbox Set (Fit SP130-170) GBB Rifle The Mega Fins features a

The Mega Fins features a full 7 sided (heptagonal) Keymod system

1:1 Scale Airsoft Replica of S&W M&P15 MOE  Fully S&W Licensed Engrave Logos / Laser Markings  S&W M&P15 Receiver (Easy Disassembly)  Bolt Locking & Functional Bolt Catch  Magpul PTS MOE Retractable Stock w/ Rubber Buttpad  Magpul PTS MOE Pistol Grip  Magpul PTS Flip-Up MBUS Rear Sight  Magpul PTS MOE Handguard  Magpul PTS 360 Rounds PMAG (Hi-Capacity)  16inch One-Piece Outer Barrel  High Quality 7mm Bearing Metal Gearbox  Aluminum & High Grade Polymer Made

but due to its popularity among users

Pistol with 14mm Threaded Barrel (Clockwise / Counter-Clockwise)  Super rigid construction for high end upgrade user  Very authentic look  Length: 150mm  Diameter: 32mm

Guarder SR-16 BoreUp Full Gearbox Set (Fit SP130-170) GBB Rifle The Mega Fins features aA complete Gearbox Upgrade kit includes ALL parts for upgrading your Airsoft Electric Gun AEG Infinite Torque Up Version Guarder made this kit with all suitable parts to super tune up your AEG Rifle The combination of difference parts allow an optimal result & performance Hard and rigid material used, including S304 Stainless Steel, Brass, Polycarbonate, Aluminum, Acetal and Steel As always, upgrading AEG require necessary skill & technique to