Includes:
- HG-V-15K – Palm Handguard® – Vented 15″ KeyMod with Barrel Nut
- BAA3-L16 – 16″ Light Weight Barrel
- FTT-EA1 – A3 Upper Receiver Assembled
- BC-A-223 – Fully Assembled Bolt Carrier – .223
- BL-04A – Carbine Gas Tube
- GB-LP750 – Gas Block .750
- UR-19 — Charging Handle
- BL-06-A2 — A2 Flash Hider

Upper Specs:
- 7075-T6 Forging
- Hard coat anodize Black

Bolt Specs:
- Bolt: Carpenter 158 steel
- Extractor: 4140 Alloy steel
- Army Spec Heat Treatment
- Manganese Phosphate

Bolt Carrier Specs:
- Carrier: 8620 steel
- Cam pin: 4340 Alloy steel
- Carrier key: 4130 Alloy steel
- Army Spec Heat Treatment
- Manganese Phosphate

Barrel Specs: Lightweight 16″ Barrel
- 5.56 mm
- 4140 Chrome Moly
- Threaded Barrel — Thread Pitch 1/2 x 28
- Gas Block Diameter .750
- Gas Tube Length — Carbine
- Gas Tube Material: 304 SST per Army Spec
- 1-9 RH Barrel Twist
- 6 Lands and Groves
- M4 Feed Ramp
- Button Broached

Includes:
- HG-V-15K – Palm Handguard® – Vented 15″ KeyMod with Barrel Nut
- BL-B24FT – 24″ Bull Barrel, Fluted, Threaded 416 SST
- FTT-EA1 – A3 Upper Receiver Assembled
- BC-A-223 – Fully Assembled Bolt Carrier – .223
- BL-04 – Rifle Length Gas Tube
- GB-LP936 – Gas Block .936
- UR-19 — Charging Handle
- BL-06-A2 — A2 Flash Hider

Upper Specs:
- 7075-T6 Forging
- Hard coatanodize Black

Bolt Specs:
- Bolt: Carpenter 158 steel
- Extractor: 4140 Alloy steel
- Army Spec Heat Treatment
- Manganese Phosphate

Bolt Carrier Specs:
- Carrier: 8620 steel
- Cam pin: 4340 Alloy steel
- Carrier key: 4130 Alloy steel
- Army Spec Heat Treatment
- Manganese Phosphate

Barrel Specs:
- 24″ Fluted Bull Barrel .
- 223 Rem
- 416 SS
- Threaded Barrel — Thread Pitch 1/2 x 28
- Gas Block Diameter .936
- Gas Tube Length — 16″ Carbine, 18″, 20″, and 24″ are Rifle
- 1-9 RH Barrel Twist
- 6 Lands and Groves
- M4 Feed Ramp
- Button Broached

Our complete upper assemblies will arrive to you inspected, tested, and ready to drop-in and go to work. We maintain our high standard of tolerances and attention to detail as the uppers we use for complete rifle builds. Every built upper and complete gun is test fired before leaving our facility for function check before it reaches you. We offer several rail choices and rail lengths. Use the drop bar to make your selection.

Forged Upper Receiver
- 7075 T6 Construction
- Forward Assist
- Ejection Port Door
- Ejection Port Door Spring
- Ejection Port Door Rod

16" Mid Length CHF Barrel
- Cold Hammer Forged Optimal Profile
- 20,000+ Round Service Life
- DIN 21CrM0V511
- Chrome Lined to M249 Spec
- 1/7 Twist Rate
- 1/2 X 28 Thread Pitch for Muzzle
- 5.56 Nato Chamber
- .750 Gas Block Seat
- M4 Feed Ramped Barrel Extension
- Mil-Spec Phosphate Coating

Delta Ring Assembly
- Mil-Spec Barrel Nut
- Delta Ring
- Weld Spring
- Snap Ring

A2 Front Sight Base Pinned
- Sling Swivel
- Front Sight Post
- FSP Detent
- FSP Detent Spring

Mid Length Handguard
- Black

Mid Length Gas Tube
- Black Nitride Inside and Out
- Gas Tube Roll Pin

Charging Handle
- Forged Aluminum
- Mil-Spec Type 3 Coating

Phosphate M16 Complete BCG
- Phosphate Coated
- Laser Engraved with ST Spider logo
- High Pressure Tested (HPT)
- Magnetic Particle Inspected (MPI)

A2 Flash Hider
- 1/2" Crush Washer

Weight: 4lb 2oz

Our complete upper assemblies will arrive to you inspected, tested, and ready to drop-in and go to work. We maintain our high standard of tolerances and attention to detail as the uppers we use for complete rifle builds. Every built upper and complete gun is test fired before leaving our facility for function check before it reaches you. We offer several rail choices and rail lengths. Use the drop bar to make your selection.

Forged Upper Receiver
- 7075 T6 Construction
- Forward Assist
- Ejection Port Door
- Ejection Port Door Spring
- Ejection Port Door Rod

16" M4 Profile Barrel
- MIL-B-11595E CMV
- Chrome Lined
- 1/7 Twist Rate
- 1/2 X 28 Thread Pitch for Muzzle
- 5.56 Nato Chamber
- .750 Gas Block Seat
- M4 Feed Ramped Barrel Extension
- Mil-Spec Phosphate Coating

9” BAR2 Rail
- 7075 T6 Barrel Nut
- 6061 T6 Rail
- Continuous Top Rail
- Free Floating 1 Piece
- Q.D. Attachment Points

Low Profile Gas Block
- Solid Billet Steel
-.750 I.D.

Carbine Gas Tube
- Black Nitride Inside and Out
- Gas Tube Roll Pin

Charging Handle
- Forged Aluminum
- Mil-Spec Type 3 Coating

Phosphate M16 Complete BCG
- Phosphate Coated
- Laser Engraved with ST Spider logo
- High Pressure Tested (HPT)
- Magnetic Particle Inspected (MPI)

A2 Flash Hider
- 1/2" Crush Washer

Weight: 4lb 3oz

Our complete upper assemblies will arrive to you inspected, tested, and ready to drop-in and go to work. We maintain our high standard of tolerances and attention to detail as the uppers we use for complete rifle builds. Every built upper and complete gun is test fired before leaving our facility for function check before it reaches you. We offer several rail choices and rail lengths. Use the drop bar to make your selection.

Forged Upper Receiver
- 7075 T6 Construction
- Forward Assist
- Ejection Port Door
- Ejection Port Door Spring
- Ejection Port Door Rod

16" M4 Profile Barrel
- MIL-B-11595E CMV
- Chrome Lined
- 1/7 Twist Rate
- 1/2 X 28 Thread Pitch for Muzzle
- 5.56 Nato Chamber
- .750 Gas Block Seat
- M4 Feed Ramped Barrel Extension
- Mil-Spec Phosphate Coating

Delta Ring Assembly
- Mil-Spec Barrel Nut
- Delta Ring
- Weld Spring
- Snap Ring

A2 Front Sight Base Pinned
- Sling Swivel
- Front Sight Post
- FSP Detent
- FSP Detent Spring

M4 Handguard
- Double Heat Shield

Carbine Gas Tube
- Black Nitride Inside and Out
- Gas Tube Roll Pin

Charging Handle
- Forged Aluminum
- Mil-Spec Type 3 Coating

Phosphate M16 Complete BCG
- Phosphate Coated
- Laser Engraved with ST Spider logo
- High Pressure Tested (HPT)
- Magnetic Particle Inspected (MPI)

A2 Flash Hider
- 1/2" Crush Washer

Weight: 4lb 2oz

Our complete upper assemblies will arrive to you inspected, tested, and ready to drop-in and go to work. We maintain our high standard of tolerances and attention to detail as the uppers we use for complete rifle builds. Every built upper and complete gun is test fired before leaving our facility for function check before it reaches you. We offer several rail choices and rail lengths. Use the drop bar to make your selection.

Forged Upper Receiver
- 7075 T6 Construction
- Forward Assist
- Ejection Port Door
- Ejection Port Door Spring
- Ejection Port Door Rod

14.5" Mid Length Lightweight Barrel
- MIL-B-11595E CMV
- Chrome Lined
- 1/7 Twist Rate
- 1/2 X 28 Thread Pitch for Muzzle
- 5.56 Nato Chamber
- .625 Gas Block Seat
- M4 Feed Ramped Barrel Extension
- Mil-Spec Phosphate Coating

12” SAR3 Rail
- 7075 T6 Barrel Nut
- 6061 T6 Rail
- Continuous Top Rail
- Free Floating 1 Piece
- Q.D. Attachment Points

Low Profile Gas Block
- Solid Billet Steel
- .625 I.D.

Mid Length Gas Tube
- Black Nitride Inside and Out
- Gas Tube Roll Pin

Charging Handle
- Forged Aluminum
- Mil-Spec Type 3 Coating

Phosphate M16 Complete BCG
- Phosphate Coated
- Laser Engraved with ST Spider logo
- High Pressure Tested (HPT)
- Magnetic Particle Inspected (MPI)

Dynacomp Muzzle Device
- Pin and Welded (16" OAL)

Weight: 3lb 12oz