Complete Uppers

The PWS MK1 MOD 2-M line, revamped for 2018, features the PWS long stroke piston system. While the internals remain the same as other PWS lines, the MK1 MOD 2-M offers a variety of features exclusive to this line. Starting with patent pending PicLok...

The PWS MK1 MOD 2-M line features the PWS long stroke piston system. While the internals remain the same as other PWS lines, the MK1 MOD 2-M offers a variety of features exclusive to this line. Starting with patent pending PicLok technology on the free...

Primary Weapons System MK116 Mod 1-M Upper Receiver 7.62x39mm- 16" Barrel The MK116 MOD 1-M Upper equipped with the renowned PWS long-stroke piston system, maintaining the reliability that PWS owners have come to trust. This line features a free-float...

This complete upper includes our new ATLAS R-ONE Handguard! The R-ONE line of handguards are designed with size and weight in mind, providing the perfect addition to your lightweight build. Our proprietary ATLAS attachment system is a durable and...

SIG SAUER MCX-SPEAR LT UPPER/CONVERSION. KIT 7.62 X 39MM Compatible w/any MIL-SPEC AR-15/M4 Compatible w/MCX, M400 & 516 Upgrade any M4/AR15 into an MCX-SPEAR LT. The MCX SPEAR LT developed for the SF community is the most advanced platform...

Geissele Automatics - URG-I - Near Clone Complete Upper Receiver - 14.5" P&W Surefire 4 Prong - 5.56 - 1:7 Twist - Desert Dirt Color SPECS: Mil-Spec M4 Upper Receiver Assembly Geissele Reliability Enhanced Bolt Carrier Group Geissele...

This Aero Precision M4E1 Threaded upper receiver group comes completely assembled with 16” 5.56 barrel and the ATLAS S-ONE M-LOK handguard. This barreled upper receiver group does not include BCG or charging handle allowing you to choose your...

Geissele Automatics, Super Duty MOD1, Complete Upper Receiver, 556NATO, 11.5" Cold Hammer Forged Barrel, 1:7 Twist, HuxWrx Flash Hider-QD Muzzle Device, M-LOK Free Float Handguard, Geissele Airborn Charging Handle, Nanowepon Reliability Enhanced Bolt...

This complete upper includes our ATLAS R-ONE Handguard. The R-ONE handguards are designed with size and weight in mind, while still providing plenty of real-estate to accommodate any attachment needs the end user may have. Our proprietary ATLAS...

The R-ONE handguards are designed with size and weight in mind, while still providing plenty of real-estate to accommodate any attachment needs the end user may have. Our proprietary ATLAS attachment system is a durable and dependable mounting platform,...

Aero Precision APAR700396M29: This complete upper includes Aero Precision's new ATLAS R-ONE Handguard! The R-ONE line of handguards are designed with size and weight in mind, providing the perfect addition to your lightweight build. Aero Precision's...

Aero Precision APAR700396M29: This complete upper includes Aero Precision's new ATLAS R-ONE Handguard! The R-ONE line of handguards are designed with size and weight in mind, providing the perfect addition to your lightweight build. Aero Precision's...