Description
Built like like the rifle specifically designed for the U.S. Special Operation Command. The SOPMOD (Special Operations Peculiar Modifcations) Block 1 Carbine features a 14.5″ barrel(Pin and Weld to 16″) with Quad rail and forward handgrip, along with CQB style stock and detachable A2 carry handle.
Features:
- Manufacturer: B. King’s Firearms
- Model: M4A1
- Caliber: 5.56 Nato
- Length: 14.5″ Barrel and Extended A2 Flash Hider (Pinned and Welded to over 16″ Barrel Length).
- Classification: Rifle
Includes:
- BKF M4A1 Assembled Receiver Set (*New for 2025: M4A1 Carbine markings)
- BKF Standard Power Buffer Tube Assembly
- BKF Mil Spec Fire Control Group
- BKF Mil Spec Charging Handle 556 Black
- BKF M16 BCG C158 CLP MPI/HPT Billet Extractor – Nitride
- BKF 14.5″ 5.56 Nato Carbine Length 4150 CMV 1/7 Twist CLP Barrel W/ Pinned Font Sight Base (F Marked)
- BKF Carbine Length Gas Tube
- BKF Extended Flash Hider 1/2×28
- BKF Mil Spec CQB Stock and A2 Grip
- Knights Armament Company Vertical Grip
- *NOW FEATURING BKF 2-Piece Drop-In Quad Rail (No “Diving Board” / Pic Rail Bridge over Delta Ring)
- NOTE: SHOWN WITH 30 Round ACS Metal Magazine (NOT INCLUDED)
NEW BKF M4A1 Complete Lower Receiver Features:
- “SAFE”, “FIRE” and “AUTO” markings
- Machined from 7075-T6 forged aircraft grade aluminum
- M16 Pocket Cut
- Threaded Rear takedown and bolt catch (Screws included)
- Bead blasted and hard coat anodized black (Type III, Class 2 )
- Caliber marking 5.56 MM
- Compatible with all standard AR-15 components and magazines
- Manufactured to MILSPEC on state of the art CNC equipment for consistent quality parts and exacting tolerances
- Save money by building your own AR-15 rifle from the ground up exactly the way you want it configured
All NFA/ATF Rules Apply
You may use this barrel with a lower receiver that is a Registered SBR, Machine Gun, or Pistol. Possession of this barrel along with a Non-NFA lower receiver is Prohibited, except when permanently attaching a muzzle device extending the length to 16 inches.
Additional Info
| LENGTH | 14.5″ |
|---|---|
| MATERIAL | 4150 Chrome Moly Vanadium |
| PROFILE | M4 |
| FINISH | QPQ Corrosion Resistant |
| GAS SYSTEM LENGTH | Carbine |
| GAS BLOCK JOURNAL | .750″ |
| TWIST RATE | 1:7 inches |
| MUZZLE | 1/2×28 Threaded |
| WEIGHT | 32oz w/ FSB |
PRODUCT SKU: BKF-M4A1-14.5-FSB-QUAD-SOPMOD-BLOCK1
doc.j1970 (verified owner) –
Hello friends, neighbors, enemies, frienemies, inlaws, and outlaws.
My name is Corey, but you can call me Doc.
Owing to the current situation on the streets, and the fact I came into a bit of money, I decided to renounce my Fudd ways and go looking for a fighting weapon…..that wasn’t from the 1800s. Having spent considerable time in certain middle eastern countries carrying an M4A1 SOPMOD Block 1, I decided that I should just go with what I know and buy the civilian version. My first stop wasn’t B. King’s Firearms, it was another company famous for their FN-FAL rifles. Sadly, they weren’t interested in my $1,200 as they were not only out of stock, their AR lines wasn’t even running to build more. On I went, determined and irritated. After a bit more scrolling and I come across this weapon, made by this company. Damn! It even had the pimp handle and the carry handle with standard sights…..and it was almost $300 less than the one by the “other guys”. I was in love. With shaking hands I called them up and one of the guys with the patience of a saint answered all of my stupid questions while I fangirled over this rifle.
Long story short, I brought it. They sent it in a timely manner, and a couple of weeks that were the longest years of my life later, I was in my local FFL dealer’s shop staring down at her in her hard case. (Yeah, they threw that in too.) She was immaculate and the fit and finish were superb. The action felt a little gritty….but that’s what a brand new phosphate coating feels like. You gotta run a couple of boxes of ammo through to smooth it out. I did just that,and she’s greasy smooth. I fed her a couple of boxes of. 223 just to get a feel for her, and while no DMR, she’s damned accurate for a carbine with iron sights. (Yes, I’m getting optics. Shut up.) No issues feeding from GI magazines, solid lock up, no issues extracting or ejecting. The shell casings all landed in the 1600 position so she isn’t overgassed running. 223. I’ll have to see about 5.56 later and if she is, I’ll run a H2 or H3 buffer. The trigger is……a GI trigger. Duh! It’s a milspec rifle. You want a sexy competition trigger, go get one, but I made a living pulling a GI trigger and I don’t mind it on a service rifle and that’s what she is, a service rifle….minus the giggle switch. And even though she only got a two position selection, her receiver has the “Burst” selector position marked on it……and it’s got an M16 cut …..maybe you know a guy……Nevermind.
This rifle is everything I was looking for. If you’re an old GWOT veteran and want a piece of your foolish youth that you can shoot, or you’re into the “retro” AR scene (damn kids), the BKF M4A1 SOPMOD Block 1 is your rifle.
The guys at BKF are great, and very helpful.
Their rifles are top notch.
This rifle is excellent and I could not be happier with it.
Corey “Doc” Jeffries.
Hamlet, NC.
AIRBORNE LEADS THE WAY.