Description
The BKF M4 MOD-0 Stripped Upper Receiver is a step up from our regular BKF-15 stripped uppers. The M4 MOD-0 uppers are held to tighter tolerances, Dry film lubed and tight fitting when paired with our M4 MOD-0 Lowers. Forged from 7075-T6 aluminum, this stripped upper is precision machined to mil-spec M16/M4 specifications and features M4 feedramps. Match this upper with one of our M4 MOD-0 lower receivers for a solid and dependable fit. This upper receiver has laser engraved T-Marks. (The Inside Diameter for the barrel extension is slightly undersized for a tighter fit to the barrel and will produce a more accurate rifle. Please note: you may need to use a heat gun or hair dryer to warm up threaded bore of receiver and freeze your barrel if your barrel extension is too tight.)
Features:
- M4 Feedramps
- 7075-T6 aluminum
- .250 takedown pin holes
- Machined .9980″ barrel extension
- Machined .4960″ Lugs
- Laser engraved T-marks
- Dry Film Lubed Upper
- Type 3 Hard Coat Anodizing
- Made in the USA
PRODUCT SKU: BKF-M4M0-SU
Jonathan Shelley (verified owner) –
There are a few clearance issues but we are working on them.
tahoe2 (verified owner) –
A superb, no frills, upper receiver with no “T” marks… also purchased a forward assist and ejection port cover from B.Kings. It all went together smoothly, I mated it to a SOTA Arms “billet” lower and it is very tight !! Installed a “KAK” stainless 18″ barrel in “350 Legend” (also extremely tight). I am 100% satisfied and haven’t even shot it yet… fit and finish of this upper receiver is great !! IMO I’m not an expert by any means, but will definitely get another one for my 6.5 Grendel build.
Shaun (verified owner) –
Just what I was needing
Brandon W. (verified owner) –
Very good
david s. (verified owner) –
I love it, super tight with my SOTA Arms lower, upper kit went in smooth as silk, barrel would not go in dry, nice and tight barrel install with a bit of gun oil. Bcg cycles smooth and deliberate with nice lock up. Couldn’t be happier, can’t wait to shoot, this 350 Legend build… super excited with this build !!!
Tyler Brown (verified owner) –
Great upper for the price and a great company behind it.
John S. (verified owner) –
Great upper at at fantastic price!
James (verified owner) –
Great product for a great price!
Legrand (verified owner) –
just as advertised
Mike m. (verified owner) –
Good stuff
Merlyn L. (verified owner) –
Cycles smooth and can’t beat that price. Would and have recommended
Anonymous (verified owner) –
Good deal finish is good the Machineing good will buy again and Fast shipping thank you
Anonymous (verified owner) –
Great price for my build, going to order more for future builds
Art M. (verified owner) –
Very pleased
Joshua D. (verified owner) –
Fantastic for the price! Had a few minor blems, but overall very impressed. Fit my PSA lower perfectly.
ANTHONY (verified owner) –
Looks flawless
Anonymous (verified owner) –
Incredibly fast shipping, solid upper. I’m a huge fan of BKF now.
DAVID S. (verified owner) –
very fast processing and shipment. prepaid shipment is a positive factor
Anonymous (verified owner) –
The shipment came on time and the product looks great!
ANTHONY MARKS (verified owner) –
I got one of these on sale a while back and it was perfect. The most important part is the barrel receiver fit was a “tap in” fit, No need for bedding, it was exactly to spec. Looking to buy another.
Ryan C. (verified owner) –
Fast shipping
Jefferey P. (verified owner) –
Great upper! Coating color doesn’t exactly match an M4E1 lower, but was coating the set anyways. It is a tight, non-wiggle, fit to the M4E1, which is the important part.
Jason S. (verified owner) –
Perfect
Robert G. (verified owner) –
Just what I was looking for. Quality upper and a decent price. The build quality is excellent. The fit and finish is perfect. Shipping was very fast. I will recommend B. King’s to a friend.
Jacob (verified owner) –
Tyler K. (verified owner) –
Dale A. (verified owner) –
Fast shipping, fairly priced and great product. Will buy from B.Kings again for future builds. Supporting Veteran companies is always a good thing.
Dal Willis (verified owner) –
Jason Samuels (verified owner) –
Tiny bit of forging marks under finish. Could have used a bit more machining to clean up, buy still a great receiver for the price point
Merlyn Leger (verified owner) –
Have had mine since 2019 and not a single complaint, matched decent with a Spikes lower on my first build. A great buy for a great price.
Ryan Spindell (verified owner) –
Anonymous (verified owner) –
These compare EXACTLY to a BCM upper. Very tight tolerance, barrels MUST be thermal fit. Dry film lube inside the upper where the bcg rides.
John McCorkle (verified owner) –
Really like these uppers
William Henderson (verified owner) –
Barry H. (verified owner) –
Nice upper! Good tight fit with Faxon barrel
Daniel C. (verified owner) –
My absolute favorite uppers, tight fitting makes for an accurate rifle, impeccable machining. You can’t beat the price either!
Daniel C. (verified owner) –
Excellent quality and finish. No joke on the tight fit, have the heat ready lol
JAKE FORD (verified owner) –
These have fast become my go to upper. Nice tight tolerances, good looking machining. priced well. only reason I gave 4 stars instead of 5 is the dry film lube is applied a bit lightly on most I’ve received. and an “M4” on the front mark over the gas tube would be nice.
Christopher Todecheene (verified owner) –
I used alot of websites for my Builds but you guys do a way outstanding Job, fast shipping, great product, and very very good price, i always recommend you guys to family and friends, I just have nothing to say but great things, thank you guys and gals, God bless you and have a beautiful blessed day