H&K HK417 is the Larger caliber variant of the HK416 rifle developed by Heckler & Koch which charmbered 7.62 x 51mm NATO rounds. It is intended for use as a marksman rifle and avaliable in 3 different lengths as follow,

Assaulter: comes with a 12 inch standard barrel
Recce / Recon: comes with a 16 inch standard barrel or accurated barrels.
Sniper: comes with a 20 inch accurated barrel.

Same as HK416, 417 also have 2 variants for civilian market only in semi-auto: MR308 (only avaliable in Germany) and MR762 (only for US market).

HK417 has been adopted for service by a number of armed force, special forces and law enforcement, also, the MR308, the civilian model of the 417, has been adopted as the marksman rifle of the German Army and renamed as G28 and used in the battle field.

Features:
14mm CCW Metal Flash Hider.
Metal Rail Handguard with H&K type gas block.
12 inch outer barrel with realiest gas piston.
Removable metal made H&K style front and rear iron sight.
Metal Body Frame with clear “H&K” logo, marking and serial number.
Standard 20mm rail on the upper frame for rail attachments.
Adjustable Hop up system.
Constructed of VFC GBB system with bolt locked after the last shot.
Comes with metal GBB Bolt Carrier with H&K Logo.
Comes with new H&K Style ambi selector lever (if the rifle is not cocked, please don't push the selector lever to “Safe”).
New Nylon Fiber H&K style handgrip.
New Nylon Fiber H&K 417 style Retratable Stock with 6 Positions Collapsible.
Ready to go for 380 – 400 FPS (green gas, 0.2g BB) without modification.
Included 20 rounds 417 gas magazine.

Specifications:
Length: 805 mm, 885 mm (Stock extended)
Barrel Length: ~ 340 mm
Shooting Mode: Safety, Semi-Auto & Full-Auto
Weight (g): 3750(gun with magazine), 5420 (with box)
Color: Black
Power Source: 12KG (Green gas)
Magazine Capacity: 20 + 1 Rounds
Material: Metal & Nylon Fiber
Bullet type: 6mm BB
Power (Muzzle Velocity): 380 – 400 FPS (green gas, 0.2g BB)
Manufacturer: UMAREX