This .458 Socom Complete Upper Receiver MLOK is built by J-5 Tactical using only quality American made parts. This is a complete, AR-15 .458 Socom Complete Upper Receiver with a MLOK handguard that is fully assembled and will perform without hesitation, consistently placing rounds where you aim. All J-5 Tactical .458 Socom Complete Upper Receiversare tested prior to shipping.
1 – Complete BIG BORE upper receiver
* larger ejection port, with forward assist.
1 – 16″ parkerized .458 Socom barrel
1 – 15″ MLOK free floating hand guard and barrel nut
1 – Muzzle Brake
1 – Micro .936 gas block
1 – Stainless steel gas tube (carbine length)
1 – Mag Phos .458 specific bolt carrier group
1 – Mil-Spec Charging handle
*We do not recommend Hexmag for .458 Socom we test fire with the Lancer .458 and properly modified GI mags.