Daily Deal - Rio Game Loads 12Ga 1-1/4oz #6 $13.99 $11.99 - Get Yours!

M4A1 FSP 5.56x45mm 14.5"BBL Stripped Upper W/12.25"Handguard
M4A1 FSP 5.56x45mm 14.5"BBL Stripped Upper W/12.25"Handguard
M4A1 FSP 5.56x45mm 14.5"BBL Stripped Upper W/12.25"Handguard
M4A1 FSP 5.56x45mm 14.5"BBL Stripped Upper W/12.25"Handguard
M4A1 FSP 5.56x45mm 14.5"BBL Stripped Upper W/12.25"Handguard
M4A1 FSP 5.56x45mm 14.5"BBL Stripped Upper W/12.25"Handguard
M4A1 FSP 5.56x45mm 14.5"BBL Stripped Upper W/12.25"Handguard
M4A1 FSP 5.56x45mm 14.5"BBL Stripped Upper W/12.25"Handguard
M4A1 FSP 5.56x45mm 14.5"BBL Stripped Upper W/12.25"Handguard
M4A1 FSP 5.56x45mm 14.5"BBL Stripped Upper W/12.25"Handguard
M4A1 FSP 5.56x45mm 14.5"BBL Stripped Upper W/12.25"Handguard
M4A1 FSP 5.56x45mm 14.5"BBL Stripped Upper W/12.25"Handguard
M4A1 FSP 5.56x45mm 14.5"BBL Stripped Upper W/12.25"Handguard
M4A1 FSP 5.56x45mm 14.5"BBL Stripped Upper W/12.25"Handguard
M4A1 FSP 5.56x45mm 14.5"BBL Stripped Upper W/12.25"Handguard
M4A1 FSP 5.56x45mm 14.5"BBL Stripped Upper W/12.25"Handguard
M4A1 FSP 5.56x45mm 14.5"BBL Stripped Upper W/12.25"Handguard
M4A1 FSP 5.56x45mm 14.5"BBL Stripped Upper W/12.25"Handguard
M4A1 FSP 5.56x45mm 14.5"BBL Stripped Upper W/12.25"Handguard
M4A1 FSP 5.56x45mm 14.5"BBL Stripped Upper W/12.25"Handguard
M4A1 FSP 5.56x45mm 14.5"BBL Stripped Upper W/12.25"Handguard
M4A1 FSP 5.56x45mm 14.5"BBL Stripped Upper W/12.25"Handguard
M4A1 FSP 5.56x45mm 14.5"BBL Stripped Upper W/12.25"Handguard
M4A1 FSP 5.56x45mm 14.5"BBL Stripped Upper W/12.25"Handguard
BrownellExclusive BrownellExclusive
MadeInUsa OFF

DANIEL DEFENSE - M4A1 FSP 5.56x45mm 14.5"BBL Stripped Upper W/12.25"Handguard

8 Reviews
M4A1 FSP 5.56x45mm 14.5"BBL Stripped Upper W/12.25"Handguard
Brownells #
430106319
MFR #
BROWNELLS-M4A1 FSP
UPC
818773024082
$899.99
Coupon Code
Purchase Limit Help

In stock

NOTIFY ME WHEN IT'S BACK IN STOCK
Standard Shipping Estimated Delivery
Estimated delivery: Oct 23
Can we ship this to you? (US only)
{{restriction.odmShipCheckMessage}}

How To Buy Guns Online

International purchase information

Specifications
Color:
DDC
Attachment Type:
Picatinny
Cartridge:
5.56x45 NATO
Barrel Contour:
M4
Gas System Length:
Carbine
Gas Block Diameter:
0.750 Inches
Finish:
Anodized
Barrel Length:
14.50
Hand:
Right
Item Weight (lbs):
4.000
Item Length (Inches):
22.000
Item Height (Inches):
2.250
Kit:
Partial
Twist:
1-7
Quantity:
1
Item Width (Inches):
2.250
Make Model Fit:
AR-15.Universal
Material:
Aluminum
Receiver Style:
Stripped
Muzzle Threads:
1/2"x28
Model Number:
M4A1
Restriction
Threaded Barrel Restriction:
Yes
Ship to all EXCEPT:
Australia, Poland
View US State Restrictions
Can we ship this to you? (US only)
{{restriction.odmShipCheckMessage}}

How To Buy Guns Online

International purchase information

What is the DANIEL DEFENSE - M4A1 FSP 5.56x45mm 14.5"BBL Stripped Upper W/12.25"Handguard?
This Daniel Defense M4A1 FSP AR15 style Upper Receiver Group was built for customers wanting a firearm inspired by USSOCOM SOPMOD Block II. It features the M4A1 FSP RIS II picatinny quad rail in Flat Dark Earth, a 14.5" M4 SOCOM heavy profile barrel, Mil-Spec F-Marked front sight base.

  • UPPER RECEIVER: Mil-Spec with Indexing Marks and M4 Feed Ramps. CNC Machined of 7075-T6 Aluminum, Type III Hard Coat Anodized
  • BARREL: Chrome Moly Vanadium Steel, Cold Hammer Forged, 1:7 Twist, 14.5" M4 SOCOM Heavy Profile, Chrome Lined, Mil-Spec Heavy Phosphate Coated, and HP/MPI Tested
  • GAS SYSTEM: Mil-Spec F-Marked Front Sight Base, Carbine Length, Direct Impingement
  • HANDGUARD: Daniel Defense M4A1 FSP Rail Interface System (RIS) II, CNC Machined of 6061-T6 Aluminum, Type III Hard Coat Anodized FDE
  • SIGHTS: Includes Daniel Defense A1.5 Fixed Rear Sight and A2 Front Sight Post in the F-Marked Front Sight Base
Made in the USA!

DOES NOT INCLUDE: Bolt Carrier Group, Charging Handle and Muzzle Device

See all of our AR15s and AR15 parts here.

Threaded Barrel Restriction: 
Threaded Barrels have restricted shipping to CA.

Please select a FFL Dealer
Dealers near
Nearest first
arrow-down

Enter dealer or account folder information

* Required fields

MANUALLY ENTERED

Note: Hours and fees may change. Contact the dealer to confirm current information.

* Must accept required fields.

pin wrong
No dealers found

Please search by another zip code or city and state to find the nearest dealer.

  • Pin in Brownells Featured Dealers

    Choosing a Brownells Featured Dealer is the fastest and easiest way to complete your purchase. Brownells Featured Dealers have agreed to perform FFL transfers on guns purchased online from Brownells. We have their necessary FFL information on file and your FFL order will ship directly to them once processed.

  • Pin in Standard Dealers

    Standard Dealers have not yet agreed to perform FFL transfers on guns purchased online from Brownells. If you choose a Standard Dealer, you are responsible for contacting that dealer and arranging for the dealer to submit a signed copy of an FFL and to give Brownells permission to ship the gun.

  • Pin in Not Available Dealers

    Not Available Dealers are dealers Brownells cannot ship guns to at this time. These dealers either do not meet our requirements for FFL transfers, or prefer to not perform transfers for guns purchased online from Brownells.

Brownells Retail Store
Phone Call
Quickest, Hassle-Free Transfer
Pin in
Phone
Accepts ammo transfers Accepts NFA transfers
You must select required check box

Note:

Listed hours & fees are not guaranteed and subject to change. Please contact the dealer to confirm current hours & fees.
* Must accept required fields.
dealers near

Alternative products

Left Badge
Right Badge OFF  
5 Stars

200

300

Add on

Left Badge
Right Badge OFF  
5 Stars

200

300

M4A1 FSP 5.56X45MM STRIPPED UPPER RECEIVER REVIEWS

4.6
8 Reviews
5 Stars
88%
4 Stars
0%
3 Stars
0%
2 Stars
13%
1 Stars
0%
Reviews Summary
Customers overwhelmingly love the M4A1 FSP stripped upper receiver for its solid construction, customization options, and excellent performance. Many highlight its compatibility with various components and outstanding value. A few reviewers mention minor issues with alignment, but overall satisfaction is palpable among users.
What Reviewers Are Saying
Product Quality
83%
Reviewers consistently praise the upper receiver for its solid and reliable construction, noting that it feels durable and well-made. Many comment on the craftsmanship, with remarks about the weight and sturdiness indicating that it can handle rugged use.
Customization Options
72%
Several users appreciate the flexibility this upper receiver offers for customization, particularly highlighting the ability to choose muzzle devices. This theme resonates with those who prefer to tailor their setups according to individual preferences.
Value for Money
67%
Numerous reviewers feel that the price of the upper receiver is very reasonable compared to the quality and features offered, making it a great investment for their builds. Many express satisfaction with what they received relative to the cost.
Customer Experience
39%
Reviewers have a positive view of their purchasing experience, particularly praising the excellent service from Brownells. Many mention the availability of discounts, enhancing their overall satisfaction with the buying process.
5
Love it, nothing can beat it
After putting it together with my ambi dd lower, it feels even better then ris3! I love my fsp upper
Would you recommend this? Yes, I would recommend to a friend
by ABDUKARIM H. on February 26, 2026
Verified Purchase
Was this review helpful? 0
5
Best value
This is simply THE MOST SOLID upper I've ever handled. You can feel it in the construction. It has some weight, you know you can bang this around and it wont flinch. I think this is a better value than the nonstripped upper because you can put any muzzle device on it, or direct thread your suppressor. The complete upper has a pretty useless muzzle devicr if you plan to suppressor. THIS upper on the other hand, its ready for complete customization. Not a single issue, blem, or misalignment with rails. I recommend getting a QD flash hider muzzle device put on, SBRing a lower so you can run it as is without worrying, and picking up some plastic picatinny rail ladder covers off aliexpress. While you're at it, throw in a surefire clone for less than $100. Havent grouped shots at 100 yards but this is one of the best deals I've found over the past year looking for a nice upper. This is a solid starting point. Make sure you run a decent trigger, bcg, maybe a vented raptor charging handle if you can afford it. You wont be disappointed!
Would you recommend this? Yes, I would recommend to a friend
by John on October 10, 2025
Verified Purchase
Was this review helpful? 2
5
Unbelievably accurate with a red dot at 100 yards
Superb craftsmanship and detail. Finally got it out to the range today and was getting, for me, very good groups with a zero magnified Aimpoint red dot at 100 yards. Shooting supressed and it's a very soft shooting gun. Daniel Defense must almost assume people are going to shoot suppressed.
Would you recommend this? Yes, I would recommend to a friend
by Ryan H. on May 26, 2025
Verified Purchase
Was this review helpful? 4
5
Great deal, prompt shipping, packaged well
Really pleased with my whole experience from Brownells. This upper is awesome!!
by ALARIC K. on March 20, 2025
Verified Purchase
Was this review helpful? 2
5
Solid Deal With Promo Code
No plastic, Socom barrel.
by Brian B. on March 20, 2025
Verified Purchase
Was this review helpful? 1
View All 8 Reviews
Customer Questions
0 Questions