Upper Receivers & Conversion Kits
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RRA CMPLT MID A4 UPR 450BM 16" 5RD - RRA450B0592
Rock River Arms
$809.99Rock River Arms A4 mid-length upper comes chambered in .450 Bushmaster with a 16" chrome moly 1/24 twist barrel. Additionally this upper includes a RRA 13" M-Lok compatible lightweight free float rail and a RRA Operator Brake (5/8-32 thread). This is a...$809.99 -
SPIKE'S 556 UPPER 14.5"PB RAIL/DYN - SPKSTU5050-CQ2D
Spike's Tactical
MSRP: $1,006.00$945.99Spikes complete upper assemblies will arrive to you inspected, tested, and ready to drop-in and go to work. Spikes maintains the same high standard of tolerances and attention to detail as the uppers they use for complete rifle builds. Every built upper...MSRP: $1,006.00$945.99 -
SOLGW L89 V2 5.56 13.7" NOX BLK - SOLGWM4L89UPP-137-556
SONS OF LIBERTY GUN WORKS
$1,060.99These L89 Upper Receiver Groups are built using SOLGW forged upper, V2 Button rifled barrels, their V2 4140 gas block, and offered in a variety of length and muzzle device options. BCH and Charging Handles are not included.Features :L89 Rails with...$1,060.99 -
SOLGW M4-EXO3 13.7" 5.56 URG - SOLGWEXO3UPPER-137-556
SONS OF LIBERTY GUN WORKS
MSRP: $850.00$807.99Sons of Liberty Gun Works believes in Quality Mil-Spec or better parts. They believe there is no substitute for quality and that your gun should be built right the first time, ready for hard use right out of the box. They believe a quality, accurate and...MSRP: $850.00$807.99 -
SOLGW PATROL SL 16" 5.56 FSB URG - SOLGWPTRLSLUPPER16-556
SONS OF LIBERTY GUN WORKS
MSRP: $700.00$665.99Sons of Liberty Gun Works believes in Quality Mil-Spec or better parts. They believe there is no substitute for quality and that your gun should be built right the first time, ready for hard use right out of the box. They believe a quality, accurate and...MSRP: $700.00$665.99 -
AERO M4E1-T UPPER 5.56 16" FDE - APAR700315M7
Aero Precision
$714.99This complete upper includes the ATLAS S-ONE Handguard! The S-ONE line of handguards are designed with size and weight in mind, providing the perfect addition to your lightweight build. The proprietary ATLAS attachment system is a durable and dependable...$714.99 -
AERO COMPLETE UPPER 5.56 20" A2 BLK - APAR505611
Aero Precision
$622.99This AR15 Complete Upper is the same upper receiver used in the AERO M16A4 Special Edition Complete Rifle and features a 20" 5.56 Barrel with Pinned FSB, A2 Handguard and A2 Detachable Carry Handle.Features :Upper: Standard M4 Upper Receiver"Barrel: 20"...$622.99 -
AERO M4E1-T UPPER 5.56 16" BLK - APAR700305M7
Aero Precision
$674.99This complete upper includes the ATLAS S-ONE Handguard! The S-ONE line of handguards are designed with size and weight in mind, providing the perfect addition to your lightweight build. The proprietary ATLAS attachment system is a durable and dependable...$674.99 -
BLACK RAIN UPPER 458SOCOM 16" BLK - BRO-SPEC15-CU-458S
Black Rain Ordnance
$999.99Black Rain Ordnance, Inc. is a precision rearms manufacturer specializing in the modern sporting rifle design. Founded in 2009 with a benchmark to only manufacture weapons we would personally be proud to own and operate. They've sought out the best...$999.99 -
BAD 16 UPPR WRKHORSE 556 AMBI C BLK - BAD-WH-UR16B-Y-15C
BATTLE ARMS DEVELOPMENT
$783.99The WORKHORSE complete upper receiver is purpose-built around the forged WORKHORSE 7075-T6 aircraft-grade aluminum receiver and free-float rail handguard with M-LOK attachment point at 3, 6, and 9 o'clock positions. At 12 o'clock is a full-length...$783.99 -
BAD 16 UPPR WRKHORSE 556 AMBI C GRAY - BAD-WH-UR16G-Y-15C
BATTLE ARMS DEVELOPMENT
MSRP: $745.48$709.98The WORKHORSE complete upper receiver is purpose-built around the forged WORKHORSE 7075-T6 aircraft-grade aluminum receiver and free-float rail handguard with M-LOK attachment point at 3, 6, and 9 o'clock positions. At 12 o'clock is a full-length...MSRP: $745.48$709.98 -
Out of Stock
AERO M5 UPPER 308WIN 16" BLK - APAR538705M22
Aero Precision
MSRP: $780.00$699.99The M5 308 come with the S-ONE line of handguards which is designed with size and weight in mind, providing the perfect addition to your lightweight build. The proprietary ATLAS attachment system is a durable and dependable mounting platform, maintaining...MSRP: $780.00$699.99 -
AERO M4E1-T UPPER 308WIN 16" FDE - APAR538715M22
Aero Precision
$839.99The M5 308 come with the S-ONE line of handguards which is designed with size and weight in mind, providing the perfect addition to your lightweight build. The proprietary ATLAS attachment system is a durable and dependable mounting platform, maintaining...$839.99