Tromix 458 SOCOM Upper 16" Barrel Assembly and Tromix Matched 458 Socom Bolt w/ Rifle Length Rail
*Milspec forged aluminum upper receiver with forward assist and dust
assembly installed. Matte black hard coat anodized Mil 8625 Type 3 Class
2. One large single Feed Ramp for big bore cartridges. Forged from 7075 T6 aluminum. This receiver has been
correctly modified around the ejection port to allow for clearance and
proper ejection of the 458 SOCOM cartridge.
*12" Rifle Length Narrow Profile Free Float
Rail. Very comfortable and very light weight. Your choice of Keymod or M Lok slots. Slots run the entire length of our rail
at the 3, 6, and 9 o'clock postions. Picatiny rail sections NOT included
but are available for purchase on our website if needed. Rail
sections easily attach to our rails for adding accessories like bipods,
flash lights, grips, lasers, etc.
*Tromix brand 16.25″ Barrel profile is .900″ under the hand guards, .875″ at the gas
block, and .800″ at the muzzle. Carbine length gas system. Threaded
5/8-32 with a 1:14 twist. Machined for use with hand guards that don’t
use a hand guard cap. Barrel weight: 1.92 lbs. 4150 Carbon Steel.*Complete 458 Socom BCG Bolt Carrier Group built with a factory Tromix Matched bolt assembly.
*.875 low profile gas block.
*Carbine Gas Tube.
*It is HIGHLY recommended to run this upper with a D&H Tactical 458 Socom Magazine for zero feed issues. We have them available for purchase on our website.