+1-800-504-5897 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

COLT LE6921CK UPPER KIT 5.56 14.5 Caliber: .223 Remington, 5.56x45mm NATO, 17% Off w/ Free Shipping

COLT LE6921CK UPPER KIT 5.56 14.5
COLT LE6921CK UPPER KIT 5.56 14.5
1 of 1 images
COLT LE6921CK UPPER KIT 5.56 14.5

Tap Tap to Zoom

Government Export Restriction Government Export Restriction
Government Restriction Government Restriction
You May Also Like
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
Duramag SS AR-15 Rifle Magazine, 5.56/.300BLK, 20 Round, Black w/Orange Follower, 1 Pack, Stainless Steel, 2023041178CPD-20RD
Duramag SS AR-15 Rifle Magazine, 5.56/.300BLK, 20 Round, Black w/Orange Follower, 1 Pack, Stainless Steel, 2023041178CPD-20RD
(3)
List: $28.99 $24.49 Save $4.50
FAB Defense Ultimag 30R Magazine, M-16/AR15, 30 Rounds, Black, 1S0-RM-EIQ76C-FX-UMAGR30-30RD
FAB Defense Ultimag 30R Magazine, M-16/AR15, 30 Rounds, Black, 1S0-RM-EIQ76C-FX-UMAGR30-30RD
(6)
List: $19.99 $16.99 Save $3.00
Amend2 Banana Mod-2 Magazine, AR-15/M4/M16, 5.56x45mm NATO/.223 Remington, 30 Round, Yellow, 1 Pack, Polymer, 556BANANA30-30RD
Amend2 Banana Mod-2 Magazine, AR-15/M4/M16, 5.56x45mm NATO/.223 Remington, 30 Round, Yellow, 1 Pack, Polymer, 556BANANA30-30RD
(1)
List: $45.07 $27.99 Save Up to $17.08
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
Free 2 Day Shipping TRYBE Defense Low-Mass AR-15 5.56 Complete Bolt Carrier Group BCG, Black Nitride, BCG556-LM
TRYBE Defense Low-Mass AR-15 5.56 Complete Bolt Carrier Group BCG, Black Nitride, BCG556-LM
(9)
List: $194.99 $149.99 Save $45.00
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
Am I correct is thinking it can only be attached to a PISTOL BRACE LOWER? Or it needs a SBR FEDERAL TAX STAMP PERMIT(or whatever that is called)

You can buy it and take it to any gunsmith to pin and weld that muzzle device or another of your choice and you can put it on a carbine/rifle lower because the overall length will be slightly over 16” depending on which muzzle device you go with

by Branko, Verified Owner, December 25, 2022
See 1 More Answer
Will this fit my ar15 pre ban 1963 sporter 1since the front take down pin is over sized Expert Answer

The COLT LE6921CK UPPER KIT 5.56 14.5 might work with that AR. Please email us at techsales@opticsplanet.com so we can get more information to help you.

by Hunter, Gear Expert, October 4, 2022
View All Q&A You Have a Question? Ask!
Customer Reviews
Helpful Positive Review Works excellent by Jake, Verified Owner, July 8, 2018
I bought this for my Colt M4 rifle. It fits nice and snug. This is the same barrel the military uses. I love it and I would buy it again. I'd like to mention Colt is my favorite firearm maker in the world. I own nothing but Colt. I got a good deal on...
Read More...
3/7 found this helpful
Helpful Negative Review better options out there by Erik, Verified Owner, July 17, 2022
No clear colt marketing anywhere to be found on this rilfe. Bent o ring making changing of handguards really hard. Very oiled looks like been in storage. Front sight post not marked. 1913 rail are tight fitting on my ACOG mount.
2/5 found this helpful
Most Recent Reviews Average AR upper by Erik, Verified Owner, July 16, 2022
Nothing about this rifles screams colt. Feels like alot of the parts are outsourced and very few parts are made from colt. Came with a magpul rear buis. Not bad but not great upper. Unless colt change their markings i don't see any of their famous C ...
Read More...
1/1 found this helpful
Read All 3 Reviews
Caliber: .223 Remington , 5.56x45mm NATO Finish: Anodized Color: Black Gun Model: AR-15

Code: 14J-UFH-LE6921CK

MPN: LE6921CK

UPC: 098289035325

List: $1,049.00Save 17%
$869.99

Buy Together and Save

Receive $20.10 OP Bucks

Product Info for COLT LE6921CK UPPER KIT 5.56 14.5

COLT LE6921CK UPPER KIT 5.56 14.5 -image

WARNING: California`s Proposition 65

Specifications for COLT LE6921CK UPPER KIT 5.56 14.5:

Manufacturer: Colt
Caliber: 5.56x45mm NATO, .223 Remington
Finish: Anodized
Color: Black
Gun Model: AR-15
Magazine Included: No

COLT LE6921CK UPPER KIT 5.56 14.5 Orderable Models

List of Orderable Models

COLT LE6921CK UPPER KIT 5.56 14.5 , MPN: LE6921CK , UPC: 098289035325 , Code: 14J-UFH-LE6921CK
Compare (0)
1 item has been added
Add at least two items to compare