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Based on the MP5K submachine gun forward grip, this design has been widely imitated and copied. The HK Vertical Foregrip is now the industry standard for mounting an accessory grip.

Gas Block, Bleed Off Valve for MR556

Fits: MR556A1, MR762A1, HK416 (10,14.5, 16.5, 20 inch barrel lengths), HK417 (12, 16 inch barrel lengths). Use with rear drum sight 227635, 233197.

Based on the MP5K submachine gun forward grip, this design has been widely imitated and copied. The HK Vertical Foregrip is now the industry standard for mounting an accessory grip.

30rd magazine for MR556 rifle.

Lightweight, anti-pill polar fleece jacket features a chin saver and brushed tricot zippered pockets for added comfort. With contrast cover stitching for added styling, the Reactor Fleece Shell is available in a wide variety of vibrant colors.

Gas block pin for MR556 rifle

MR556 A4 1.8MM GAS VENT SCREW. RIFLE AND PISTOL SHIP WITH 1.3MM INSTALLED.