The M4A1 AR15 bolt carrier group is a direct replacement for the original USGI M16/M4 system. It was developed in response to the need for a more modular rifle, capable of being used by the military and law enforcement in the United States. The M4A1 is designed to be a modular design, which allows the user to replace certain components with different ones, depending on their needs.
It has a unique receiver extension that allows the upper receiver to be easily separated from the lower receiver, allowing the user to change the barrel length and type. This also allows the user to change the handguard, magazine well, charging handle, and buffer tube.
The M4A1 is made to be more modular than previous generations, but it is still based on the M16 platform.
Comparison Table
Best ar 15 bolt carrier group for the money Features In 2023
- Fast & Highly Efficient Carbon Cleaning Tool
- 100% Usa Made
- Package Quantity : 1
- Cnc Machined From Solid Bar Stock
- Rockwell Hardness 42 To 45
- 【Applied More Model】Upgrade 12 pieces bore adjustable adapters to fit all .177 - .78 caliber pistols and rifles,choose the caliber adapter and place the unit in the muzzle,providing a precise reference for zeroing in on your target.
- 【Push Button Switch】Upgrade push button switch,just lightly press to turn ON/OFF the laser, control it conveniently.
- 【Improve Accuracy】This bore sight projects a red beam from the center of the bore axis, providing a precise reference for zeroing in on your target, save your time and money.
- 【Easy to Use】Simply choose the caliber adapter and place the laser bore sight unit in the muzzle. Long sighting range,light weight and durable.
- Brightness Enhancement: Power: <1mW Class IIIA Laster. Max. Output Power: <5mW.Red bore sighter comes with 6pcs LR44 batteries. CAUTION: Avoid direct eye exposure to beam .
- 16-in-1 multitool to scrape and eliminate carbon fouling from multiple surfaces, including bolt and bolt carrier group
- 12 precision cut non-hardened surfaces scrape all 4 major parts of the bolt without marring or scratching
- Replaceable, nylon/phosphor bronze detailing brush, 360 degree phosphor bronze brush, cotter pin puller, and a pin punch
- One-handed access to all the tools
- Ballistic nylon protective sheath with carry strap provides for easy transport to the field, the range, or at the workbench
- Fits: AR-15 chambers in .223 Remington/5.56 NATO
- This chamber brush is specifically designed to clean all of the nooks and crannies of an AR-15 chamber
- Package of three.
- Double diameter chamber cleaning brush for AR style 5.56mm/.223 cal
- Phosphor bronze brush features stout bristles for efficient cleaning
- Stainless steel locking lug brush
- Standard American 8-32 thread; three-pack
- GUN BOSS CLEANING KIT: Compact, portable, well-organized in a zippered, weatherproof pouch which stores easily and fits in your range bag. This all-in-one rifle maintenance kit is all you need for fast gun cleaning at home or at the range
- PREMIUM QUALITY: professional, gunsmithing quality rifle cleaning tools and components include 7 section brass gun cleaning rod with ergonomic t-handle, bronze bore brush, nylon slotted bore patch tip, chamber brush, bore cleaning patches, rifle chamber patches , exterior gun cleaning brush, brass cleaning pick and bore obstruction removal tool
- QUICK REFERENCE FIELD GUIDE: step-by-step, easy to follow instructions and expert advice on disassembly, take-down, field stripping, gun cleaning, lubrication and rifle maintenance
- SATISFACTION GUARANTEED: Real Avid backs their products. We are a US based company, and our customer support is easy to reach. Customer satisfaction is our highest priority.
- SPECS: 30-piece p-handle driver set (SAE/Metric, Hex and Torx)
- SAE HEX BITS: 3/32" and standard 7/64" and ball 1/8", 9/64", 5/32", 3/16", 7/32", 1/4", 5/16", 3/8"
- METRIC HEX BITS: standard 1.5mm, ball 2mm, 2.5mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 10mm
- TORX BITS: T7, T8, T9, T10, T15, T20, T25, T27, T30, T40
- CONVENIENT: Comes with a molded stand that can sit on bench top and has mounting holes on back for hanging
- Stainless Steel Scraping Cleaning Tool
- Easily Remove Carbon and Grime Build Up
- CAT Outdoors' Scraping Tool Is Compact In Size And Easily Storable
- Provides A Quick And Effective Way To Clean
- MADE IN USA
- Rugged 6061-T6 aluminum body and protective shield plus a Patented integrated sunshade
- Advanced anti-reflective coating, scratch resistant lens system
- Parallax corrected optical system and Night vision brightness modes
- Interlock internal locking adjustment system
- 12-hr. auto shut-off
What is the best bolt carrier group made of?
This BCG is capable of full auto fire, if that’s ever a thing you need.
It features a bolt made from 9310 steel and a housing made of 8620 hardened steel, finished with a nitride treatment for great durability.
What bolt carrier group does the military use?
Military rifles are made to mil spec, and a mil spec bolt carrier group is made of phosphate.
Disadvantages of phosphate over chrome include it’s lower cost and less visible appearance in a military setting – less shiny.
Are nickel boron BCG worth it?
A nickel boron carbide burs with a slick surface is an easier and faster to clean than a standard ceramic burs.C.J.
The rough phosphate tends to hold the dirt and grime while the nickel boron doesn’t seem to as much.
Is fail zero a good BCG?
Fail Zero has created the ultimate BCG for the AR-15.
The Fail Zero BCG is one of the best on the market today.
This is one of the best options for new skimmers. With their lifetime warranty and FZBCG training system, this is an excellent option.
Should I use a lightweight BCG?
You’ll want to go the lightweight low-mass bolt carrier group (BCG) route.
The BCG (Backboard Corner Guard) is a piece of metal that moving back and forth between each shot.
Put the weight down…and you’ll put the disturbance down to a more tolerable level.
Does bolt carrier group affect accuracy?
You’ll learn how to tune the gas tube so that it makes minimal contact with the receiver and the gas key atop the BCG. This not only improves its potential accuracy and reliability, it can also help smooth the gas flow through the system during operation.
Are Lantac BCG good?
The overall quality of this product was excellent. It felt very solid and the coating was really nice.
It’s easy to feel a difference while charging or firing your rifle. If you practice your technique, you’ll be ready for anything.
Lantac makes a great bolt carrier group for the Remington 700, so if you’re in the market for a new bolt carrier group I highly recommend the Lantac E-BCG!
Are all bolt carrier groups the same?
No. The M16’s carrier is not physically different, but it is 100% compatible with any standard AR-15 buffer, parts kit, trigger, and upper and lower receiver, including any standard 80% lower.