+1-800-504-5897 Live Chat Help Center Check Order Status
About Us Policies Reviews How To
FREE SHIPPING & FREE RETURNS*

FREE SHIPPING on Over 250,000 Products

Shop now and get Free Value Shipping on most orders over $49 to the contiguous 48 states, DC, and to all U.S. Military APO/FPO/DPO addresses.

Enjoy our FREE RETURNS

We want to ensure that making a return is as easy and hassle-free as possible! If for any reason you are not satisfied with your purchase, simply return the item within 30 days of receipt, and we'll cover the cost of return shipping. Learn more about our Return Policy.

  • Entire Store
  • ...
  • Apparel & Footwear
  • Astronomy
  • Everything Else
  • Eyewear
  • Hunting Gear
  • Lab Equipment
  • Military Gear
  • Outdoor Gear
  • Photography Equipment
  • Police, EMS & Fire
  • Shooting
  • Sport Optics
  • Sports & Hobbies
TIP
Shopping Cart

Spikes Tactical Carbine Cold Hammer Forged 11.5in Upper Receiver Up to 10% Off w/ Free S&H — 9 models

Special offer available for this product. Click here to see!
Spikes Tactical Upper 5.56 11.5in FN CHF w/M4 Handguards & FSP STU5310-M4S
Spikes Tactical Upper 5.56 11.5in FN CHF w/BLK MOE Handguards & FSP STU5310-MOS
Spikes Tactical Upper 5.56 11.5in FN CHF w/FDE MOE Handguards & FSP STU5310-MOF
Spikes Tactical Upper 5.56 11.5in FN CHF w/7in BAR2 Rail & FSP STU5310-R7S
Spikes Tactical Upper 5.56 11.5in FN CHF w/9in BAR2 Rail STU5310-R9S
Spikes Tactical Upper 5.56 11.5in FN CHF w/10in BAR2 Rail STU5310-R1S
Spikes Tactical Upper 5.56 11.5in FN CHF w/12in BAR2 Rail STU5310-R2S
Spikes Tactical Upper 5.56 11.5in FN CHF w/7in SAR3 Rail & FSP, STU5310-CQ7FP
Spikes Tactical Upper 5.56 11.5in FN CHF w/13.2in BAR2 Rail STU5310-R3S
Spikes Tactical Upper 5.56 11.5in FN CHF w/M4 Handguards & FSP STU5310-M4S
1 of 9 images
Spikes Tactical Upper 5.56 11.5in FN CHF w/M4 Handguards & FSP STU5310-M4S
Spikes Tactical Upper 5.56 11.5in FN CHF w/BLK MOE Handguards & FSP STU5310-MOS
2 of 9 images
Spikes Tactical Upper 5.56 11.5in FN CHF w/BLK MOE Handguards & FSP STU5310-MOS
Spikes Tactical Upper 5.56 11.5in FN CHF w/FDE MOE Handguards & FSP STU5310-MOF
3 of 9 images
Spikes Tactical Upper 5.56 11.5in FN CHF w/FDE MOE Handguards & FSP STU5310-MOF
Spikes Tactical Upper 5.56 11.5in FN CHF w/7in BAR2 Rail & FSP STU5310-R7S
4 of 9 images
Spikes Tactical Upper 5.56 11.5in FN CHF w/7in BAR2 Rail & FSP STU5310-R7S
Spikes Tactical Upper 5.56 11.5in FN CHF w/9in BAR2 Rail STU5310-R9S
5 of 9 images
Spikes Tactical Upper 5.56 11.5in FN CHF w/9in BAR2 Rail STU5310-R9S
Spikes Tactical Upper 5.56 11.5in FN CHF w/10in BAR2 Rail STU5310-R1S
6 of 9 images
Spikes Tactical Upper 5.56 11.5in FN CHF w/10in BAR2 Rail STU5310-R1S
Spikes Tactical Upper 5.56 11.5in FN CHF w/12in BAR2 Rail STU5310-R2S
7 of 9 images
Spikes Tactical Upper 5.56 11.5in FN CHF w/12in BAR2 Rail STU5310-R2S
Spikes Tactical Upper 5.56 11.5in FN CHF w/7in SAR3 Rail & FSP, STU5310-CQ7FP
8 of 9 images
Spikes Tactical Upper 5.56 11.5in FN CHF w/7in SAR3 Rail & FSP, STU5310-CQ7FP
Spikes Tactical Upper 5.56 11.5in FN CHF w/13.2in BAR2 Rail STU5310-R3S
9 of 9 images
Spikes Tactical Upper 5.56 11.5in FN CHF w/13.2in BAR2 Rail STU5310-R3S

Tap Tap to Zoom

Government Export Restriction Government Export Restriction
Government Restriction Government Restriction
You May Also Like
Best Rated Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine w/Capacity Window, .223 Rem/5.56x45mm NATO, 30 Round, Coyote Tan, 1 Pack, Polymer, MAG556-MCT-30RD
Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine w/Capacity Window, .223 Rem/5.56x45mm NATO, 30 Round, Coyote Tan, 1 Pack, Polymer, MAG556-MCT-30RD
(36)
List: $17.95 $15.89 Save Up to $2.46
Best Rated Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine w/Capacity Window, .223 Rem/5.56x45mm NATO, 30 Round, Black, 1 Pack, Polymer, MGMPI556BLK-30RD
Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine w/Capacity Window, .223 Rem/5.56x45mm NATO, 30 Round, Black, 1 Pack, Polymer, MGMPI556BLK-30RD
(36)
List: $17.95 $15.49 Save Up to $2.46
Best Rated Magpul Industries PMAG GEN M2 MOE AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 30 Round, Black, 1 Pack, Polymer, MGMPI571BLK-30RD
Magpul Industries PMAG GEN M2 MOE AR-15/M16/M4 Rifle Magazine, .223 Rem/5.56x45mm NATO, 30 Round, Black, 1 Pack, Polymer, MGMPI571BLK-30RD
(39)
List: $12.95 $10.79 Save Up to $263.00
Best Rated Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Remington, 40 Round, Black, 1 Pack, Polymer, MGMPI233BLK-40RD
Magpul Industries PMAG GEN M3 AR-15/M16/M4 Rifle Magazine, .223 Remington, 40 Round, Black, 1 Pack, Polymer, MGMPI233BLK-40RD
(6)
List: $22.95 $20.69 Save $2.26
Best Rated Magpul Industries PMAG GEN M2 MOE AR-15/M16/M4 Rifle Magazine w/Capacity Window, .223 Rem/5.56x45mm NATO, 30 Round, Black, 1 Pack, Polymer, MGMPI570BLK-30RD
Magpul Industries PMAG GEN M2 MOE AR-15/M16/M4 Rifle Magazine w/Capacity Window, .223 Rem/5.56x45mm NATO, 30 Round, Black, 1 Pack, Polymer, MGMPI570BLK-30RD
(9)
List: $15.95 $13.89 Save $2.06
Warpath Coffee Mariner's Blend Ground Coffee, Dark Roast, Black, 12 Ounce, 104, 104
Warpath Coffee Mariner's Blend Ground Coffee, Dark Roast, Black, 12 Ounce, 104, 104
(1)
List: $19.99 $14.95 Save $5.04
Blazin' Deal TRYBE Defense Cowl Induction Muzzle Brake, 5.56/.223 Remington, 5/8x24, Black, TRBCIB55658x24
TRYBE Defense Cowl Induction Muzzle Brake, 5.56/.223 Remington, 5/8x24, Black, TRBCIB55658x24
(39)
List: $132.99 $37.49 Save Up to $145.50
Clearance TRYBE Defense AR-15 Pistol Complete Upper Receiver, 5.56mm, 10.5in, 1-7 Twist, A2 Flash hider, UPPER105556
TRYBE Defense AR-15 Pistol Complete Upper Receiver, 5.56mm, 10.5in, 1-7 Twist, A2 Flash hider, UPPER105556
(49)
List: $429.99 $279.99 Save Up to $180.00
Clearance TRYBE Defense Complete Upper Receiver, AR-15, 5.56x45mm NATO, 16in 5R Barrel, 1-7 Twist, 15in M-LOK Rail, A2 Flash Hider, BCG and CH, Nitride Black, UPPER16556
TRYBE Defense Complete Upper Receiver, AR-15, 5.56x45mm NATO, 16in 5R Barrel, 1-7 Twist, 15in M-LOK Rail, A2 Flash Hider, BCG and CH, Nitride Black, UPPER16556
(49)
List: $549.99 $369.99 Save Up to $180.00
TRYBE Defense Magnite Charging Handle, AR-15, Ambidextrous, Black, CHMAGAR15-BK
TRYBE Defense Magnite Charging Handle, AR-15, Ambidextrous, Black, CHMAGAR15-BK
(51)
List: $64.99 $49.99 Save $15.00
Questions & Answers
Is the muzzle pinned welded? I hope not because I want to run a suppressor. Manufacturer Answer

We recommend that you call us directly with the part number to ensure that you get the correct model. But if in the description it’s not stated pined, it should not be.

by Spikes Tactical, Manufacturer, July 23, 2025
See 1 More Answer
Is the muzzle pinned? Manufacturer Answer

We recommend that you call us directly. To ensure the correct part number.

by Spikes Tactical, Manufacturer, July 23, 2025
View All Q&A You Have a Question? Ask!
Customer Reviews
Most Recent Reviews Best CHF 11.5 Upper by Spikes 11.5 CHF, Verified Owner, June 11, 2025
Been shopping CHF 11.5 uppers for over a year! This is by far the best deal and quality for the money! Spikes and Optics Planet definitely delivered on this deal!!!
Most Recent Reviews Great lightweight Pistol/SBR upper by Great Shooting and Looking upper, February 26, 2024
The upper in the picture with the BAR2 quad rail was the upper I ordered but I received the upper with the CRR quad rail which is a newer lightweight quad rail. Not complaining due to how lightweight it is. I have put 350 rounds through this upper wi...
Read More...
Most Recent Reviews spikes tactical by Jay Peterson, Verified Owner, April 5, 2023
This upper is simply outstanding. Spikes tactical make incredible products. Everything they make is flawless. Their customer support team is amazing. They are also made in USA. This completed upper serves as the best you can buy for the money. The t...
Read More...
Read All 3 Reviews
Show In Stock Only
9 Models Available
Gun Model
All
Additional Features
All
Search
Click to select this item for your bundle offer!

Buy Together and Save

As low as $693.84
You Save Up to 14%
Receive $17.71 OP Bucks

made-in-usa-flag Made in USA

Help support American manufacturing! Marked models of this product have gone through rigorous review and been certified by the manufacturer as Made in the USA.

Product Info for Spikes Tactical Carbine Cold Hammer Forged 11.5in Upper Receiver

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.image

Specifications for Spikes Tactical Carbine Cold Hammer Forged 11.5in Upper Receiver:

Manufacturer: Spikes Tactical
Caliber: 5.56x45mm NATO
Barrel Length: 11.5 in
Finish: Anodized
Color: Black
Condition: New
Magazine Included: No
Country of Origin: USA

Features of Spikes Tactical Carbine Cold Hammer Forged 11.5in Upper Receiver:

  • SAR3 Rail
  • Forged Upper Receiver
  • 7075 T6 Construction
  • Forward Assist
  • Ejection Port Door
  • Ejection Port Door Spring
  • Ejection Port Door Rod
  • 11.5in Cold Hammer Forged Barrel
  • M249 SAW Chrome Lined Spec
  • DIN 21CrM0V511
  • Light Weight Profile
  • 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
  • 7in SAR3 Rail
  • 7075 T6 Barrel Nut
  • 6061 T6 Rail
  • Continuous Top Rail
  • Free Floating 1 Piece
  • Q.D
  • Attachment Points
  • A2 Front Sight Base Pinned
  • Front Sight Post
  • FSP Detent
  • FSP Detent Spring
  • 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
  • 1/2in Crush Washer

Package Contents:

  • Spikes Tactical Carbine Cold Hammer Forged 11.5in Upper Receiver

Spikes Tactical Carbine Cold Hammer Forged 11.5in Upper Receiver Orderable Models

List of Orderable Models

Spikes Tactical Upper 5.56 11.5in FN CHF w/M4 Handguards & FSP, STU5310-M4S , MPN: STU5310-M4S , UPC: 815648024284 , Code: 2A8-UFH-CCHF11UR-STU5310-M4S
Spikes Tactical Upper 5.56 11.5in FN CHF w/BLK MOE Handguards & FSP, STU5310-MOS , MPN: STU5310-MOS , UPC: 810083267425 , Code: 2A8-UFH-CCHF11UR-STU5310-MOS
Spikes Tactical Upper 5.56 11.5in FN CHF w/FDE MOE Handguards & FSP, STU5310-MOF , MPN: STU5310-MOF , UPC: 810083267418 , Code: 2A8-UFH-CCHF11UR-STU5310-MOF
Spikes Tactical Upper 5.56 11.5in FN CHF w/7in BAR2 Rail & FSP, STU5310-R7S , MPN: STU5310-R7S , UPC: 810083267463 , Code: 2A8-UFH-CCHF11UR-STU5310-R7S
Spikes Tactical Upper 5.56 11.5in FN CHF w/9in BAR2 Rail, STU5310-R9S , MPN: STU5310-R9S , UPC: 810083267470 , Code: 2A8-UFH-CCHF11UR-STU5310-R9S
Spikes Tactical Upper 5.56 11.5in FN CHF w/10in BAR2 Rail, STU5310-R1S , MPN: STU5310-R1S , UPC: 810083267432 , Code: 2A8-UFH-CCHF11UR-STU5310-R1S
Spikes Tactical Upper 5.56 11.5in FN CHF w/12in BAR2 Rail, STU5310-R2S , MPN: STU5310-R2S , UPC: 810083267449 , Code: 2A8-UFH-CCHF11UR-STU5310-R2S
Spikes Tactical Upper 5.56 11.5in FN CHF w/7in SAR3 Rail & FSP, STU5310-CQ7FP , MPN: STU5310-CQ7FP , UPC: 810083261089 , Code: 2A8-UFH-CCHF11UR-STU5310-CQ7FP
Spikes Tactical Upper 5.56 11.5in FN CHF w/13.2in BAR2 Rail, STU5310-R3S , MPN: STU5310-R3S , UPC: 810083267456 , Code: 2A8-UFH-CCHF11UR-STU5310-R3S

Spikes Tactical Carbine Cold Hammer Forged 11.5in Upper Receiver Unavailable & Discontinued Models

List of Unorderable Models

DEMO, Spikes Tactical Upper 5.56 11.5in FN CHF w/M4 Handguards & FSP, STU5310-M4S , MPN: STU5310-M4S-DEMO , Code: 2A8-UFH-CCHF11UR-STU5310-M4S-DEMO
DEMO, Spikes Tactical Upper 5.56 11.5in FN CHF w/7in BAR2 Rail & FSP, STU5310-R7S , MPN: STU5310-R7S-DEMO , Code: 2A8-UFH-CCHF11UR-STU5310-R7S-DEMO
Spikes Tactical Upper 5.56 11.5in FN CHF w/9in SAR3 Rail, STU5310-S9S , MPN: STU5310-S9S , Code: 2A8-UFH-CCHF11UR-STU5310-S9S
Spikes Tactical Upper 5.56 11.5in FN CHF w/10in SAR3 Rail, STU5310-CQ1F , MPN: STU5310-CQ1F , UPC: 810083261058 , Code: 2A8-UFH-CCHF11UR-STU5310-CQ1F
Spikes Tactical Upper 5.56 11.5in FN CHF w/12in SAR3 Rail, STU5310-CQ2F , MPN: STU5310-CQ2F , UPC: 815648024376 , Code: 2A8-UFH-CCHF11UR-STU5310-CQ2F
Spikes Tactical Upper 5.56 11.5in FN CHF w/13.2in SAR3 Rail, STU5310-S3S , MPN: STU5310-S3S , UPC: 815648024383 , Code: 2A8-UFH-CCHF11UR-STU5310-S3S
Compare (0)
1 item has been added
Add at least two items to compare