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BRN 733 C7 5.56 Upper Receiver, 11.5" 1-7 Twist Black
BRN 733 C7 5.56 Upper Receiver, 11.5" 1-7 Twist Black
BRN 733 C7 5.56 Upper Receiver, 11.5" 1-7 Twist Black
BRN 733 C7 5.56 Upper Receiver, 11.5" 1-7 Twist Black
BRN 733 C7 5.56 Upper Receiver, 11.5" 1-7 Twist Black
BRN 733 C7 5.56 Upper Receiver, 11.5" 1-7 Twist Black
BRN 733 C7 5.56 Upper Receiver, 11.5" 1-7 Twist Black
BRN 733 C7 5.56 Upper Receiver, 11.5" 1-7 Twist Black
BRN 733 C7 5.56 Upper Receiver, 11.5" 1-7 Twist Black
BRN 733 C7 5.56 Upper Receiver, 11.5" 1-7 Twist Black
BRN 733 C7 5.56 Upper Receiver, 11.5" 1-7 Twist Black
BRN 733 C7 5.56 Upper Receiver, 11.5" 1-7 Twist Black
BRN 733 C7 5.56 Upper Receiver, 11.5" 1-7 Twist Black
BRN 733 C7 5.56 Upper Receiver, 11.5" 1-7 Twist Black
BRN 733 C7 5.56 Upper Receiver, 11.5" 1-7 Twist Black
BRN 733 C7 5.56 Upper Receiver, 11.5" 1-7 Twist Black
BRN 733 C7 5.56 Upper Receiver, 11.5" 1-7 Twist Black
BRN 733 C7 5.56 Upper Receiver, 11.5" 1-7 Twist Black
BRN 733 C7 5.56 Upper Receiver, 11.5" 1-7 Twist Black
BRN 733 C7 5.56 Upper Receiver, 11.5" 1-7 Twist Black
BRN 733 C7 5.56 Upper Receiver, 11.5" 1-7 Twist Black
BRN 733 C7 5.56 Upper Receiver, 11.5" 1-7 Twist Black
None
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BROWNELLS - BRN 733 C7 5.56 Upper Receiver, 11.5" 1-7 Twist Black

9 Reviews
BRN 733 C7 5.56 Upper Receiver, 11.5" 1-7 Twist Black
Brownells #
430105692
MFR #
None
UPC
050806500679
$757.07
Coupon Code
Purchase Limit Help

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Specifications
Attachment Type:
Direct Mount
Cartridge:
5.56x45 NATO
Barrel Contour:
Lightweight
Hand:
Right
Barrel Length:
11.50
Color:
Black
Gas System Length:
Carbine
Item Length (Inches):
19.750
Gas Block Diameter:
0.625 Inches
Finish:
Anodized
Item Height (Inches):
4.000
Item Width (Inches):
2.500
Quantity:
1
Item Weight (lbs):
3.625
Make Model Fit:
AR-15.Universal
Model Number:
733
Twist:
1-7
Kit:
Full
Material:
Aluminum
Muzzle Threads:
1/2"x28 to 5/8"x24
Muzzle Device Diameter:
0.96
Receiver Style:
Assembled
Restriction
Threaded Barrel Restriction:
Yes
View US State Restrictions
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International purchase information

What is the BROWNELLS - BRN 733 C7 5.56 Upper Receiver, 11.5" 1-7 Twist Black?
The Brownells 733 C7 Upper Receiver, a classic reborn!

Featuring an 11.5" lightweight "A1" profile barrel, 1-7 twist, C7 upper with shell defector and a CAR handguards, the Commando is a unique entry into the AR-15 series. It is a mix of old school and new school, a transition from the M16A1 to the M4 platform of today.

The 733 C7 includes enough modern features to make it a viable "go to" setup, especially for those seeking a carry handle receiver. The A1 rear sight nestled in the C7 upper receiver, is known for being extremely robust and dependable. The C7 upper, originally only found on Canadian AR-15 models, is a blend of the M16A1 and M16A2, being essentially an M16A1 receiver with the "Burton bump" shell deflector found on the M16A2 receiver. This lefty friendly feature is now commonplace on modern forged uppers.

The barrel is 11.5 inches in length, with a 5.56x45mm chamber and 1-7 twist, making it a unique carry handle configuration with the tighter twist. The barrel features a chrome bore and chamber with a phosphate exterior finish. This light barrel makes the short upper extemely handy. The barrel is capped with an A1 flash hider. The included bolt carrier group is a standard mil-spec version, with a phosphate exterior and chrome interior carrier and gas key.

Features:
  • C7 type upper receiver with shell deflector
  • A1 flash hider
  • CAR handguard with heatshield
  • 11.5 inch 5.56x45mm barrel with chrome bore and chamber
  • 1-7 twist
  • A1 rear sight assembly
  • A1 round front sight post
  • Non-F-marked front sight base
  • Front Sling Swivel
  • M16 bolt carrier group with phosphate finish, chrome bore
  • Mil-spec charging handle

See all of our AR15s and AR15 parts here.

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

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AR-15/M16 733 C7 11.5" 5.56 UPPER RECEIVER REVIEWS

4.3
9 Reviews
5 Stars
78%
4 Stars
0%
3 Stars
11%
2 Stars
0%
1 Stars
11%
Reviews Summary
Customers appreciate the fit, finish, and overall design of the AR-15/M16 733 C7 upper receiver, noting its lightweight and accuracy. However, concerns over gas system issues and component durability arise, with some reporting excessive wear after limited use. Despite its higher price, many find the quality justifies the cost.
What Reviewers Are Saying
Product Quality
70%
Reviewers generally praise the fit and finish of the upper receiver, appreciating its lightweight design and reliability. Many report successful performance and accuracy during initial testing, contributing to a positive perception of overall product quality.
Durability Concerns
60%
A notable number of reviewers express concerns about the longevity of the upper receiver, citing issues like excess wear on parts such as the bolt carrier group and gas rings after a limited number of rounds. This has raised doubts about the receiver's long-term reliability.
Customer Experience
40%
Several reviews mention positive experiences with Brownells, particularly in terms of product replacement and customer service. However, some express dissatisfaction with the support received for durability issues, indicating a mixed customer service experience.
Value for Money
50%
While some find the upper receiver to be on the pricier side, many feel that the quality justifies the cost. Reviewers highlight the solid construction and appealing features, making it a worthwhile investment for enthusiasts, despite some concerns about durability.
Product Features
30%
Reviewers discuss specific features like the absence of M4 feed ramps and the overall design that is considered clone correct. Though some suggest these features could be improved, they recognize the importance of authenticity in retro models.
Customer Photos & Videos
5
Turn up the HEAT!
Excellent quality upper. Used this to build my HEAT 733 clone. Replaced the teardrop forward assist for a normal one. Zeroed at 25 meters and tested accuracy out to 250 meters. Great groupings within 1.5 inches at 25m. Shoots loud and proud without any malfunctions with steel and brass case ammo.
Would you recommend this? Yes, I would recommend to a friend
by Mario on October 20, 2025
Verified Purchase
Was this review helpful? 0
5
Sbr
Looks great..now waiting for my Form 1 paperwork to be completed before assembly...
by TERRY SOUTHALL on October 09, 2025
Verified Purchase
Was this review helpful? 0
5
Retro cool...
Personally I love the M733 rifle so much I had to purchase this particular upper. Fit and finish was great. No flaws or blemishes what so ever. I don't know if Brownells zeroed my upper after assembly but it took very few adjustments to achieve my preferred POI. When I mated it with a registered lower of mine, the total weight of the rifle, with fully loaded mag, was around 8 pounds or just under. The pencil barrel makes the entire package a light, quick and handy carbine. Zero malfunctions when it came to shooting my 55gr .223 reloads. This is definitely my favorite retro upper and completely satisfied with it.
Would you recommend this? Yes, I would recommend to a friend
by ABNER MAGNO on September 23, 2024
Verified Purchase
Was this review helpful? 2
5
old school look
the price for this upper is approaching the high side but i am happy with quality of upper finish. well worth it. square forge receiver, looking thru bottom side of heatshield, barrel marked luth ar5.56 1/7 c for chrome, mil spec bolt carrier looks good staking ok, description says no m4 feed ramps however the upper i received has just the beginning of m4 feed ramps slight milling in aluminum where barrel ext. mates with receiver. not a problem. i like the small barrel profile, small handguard, slightly tapered front sight post, this upper goes with a pistol lower with the new h and r brace. nice light package. h2 buffer,55 grain fmj, cyles great. highly recommend
Would you recommend this? Yes, I would recommend to a friend
by butch on June 27, 2024
Verified Purchase
Was this review helpful? 4
5
This review brought to you by Carry Handle Gang
This complete upper receiver looks great, no issues that I see with the BCG, charging handle, or sights. Only complaint is that it doesn't come with M4 feed ramps, but that wouldn't be clone correct. It definitely would be a practical improvement that's not seen without close inspection. I did have to ask customer support to confirm the A1 flash hider is NATO mil-spec because I have a suppressor coming that can use NATO mil-spec muzzle devices to mount.
by Mike A on February 06, 2024
Verified Purchase
Was this review helpful? 16
View All 9 Reviews
Customer Questions
0 Questions