If it was some flat top + 16" FSB barrel id just swap upper/barrel, but this is a little more challenging to do that with. If you ever have an issue, then look at getting a correct barrel for the upper. This can lead to a rare but odd situation; barrel and receiver mismatch. 50 bucks one way or the other on the barrel ain't squat! BEFORE YOU GO MODIFYING IT, check your headspace.I have a Gibbz upper in my junk drawer because the upper -- for some reason -- wouldn't allow a perfectly good bolt (as checked by Criterion) to headspace correctly on a Criterion barrel, with the bolt installed in the carrier. Thats true overall and good to keep in mind. Paste as plain text instead, - The Shooter's Log, 2012 SHOT Show Special Report: Del-Ton TRX Rifle and More! But, as with anything else, this work can go too far. There's a 7 degree difference between standard and M4 ramps. Watch a video about our Modern Series AR barrel: AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own. I'll probably build a pistol out of this one. Most work performed while-you-wait, evening and saturday appointments available.
CUTTING M4 RAMPS - YouTube M4 Feedramps - AR-15 Pro Feed Ramp Polishing - How To Do It Properly? - Homestead & Prepper Featuring hand lapped 1/8 twist rate button rifling and M4 feed ramps barrel extensions, the 410 stainless barrel gives the shooter the best balance of weight and accuracy. 2. Reliability is the main concern for me when I re-barrel this rifle. Metal cases ammunition such as Wolf through an M4 clone? The Mission of Cheaper Than Dirt! By using the M4 feed ramps for your firearm, you could pick up an increased percentage of the rounds, and feeding reliability would be improved. Higher pressure equte to parts (bcg, buffer, buffer spring, ROUNDS, etc) experiencing much higher wear/tear. While this gun is a more of novelty build than a "serious use" AR, I intend to use good parts and want it to run as well as my other ARs. Add 3% to the total cost for credit card purchases. It is removeable with a special wrench and a barrel clamp/vise. You can put a M4 barrel and non-M4 receiver together, but you can't mismatch them the other way.
m4 feed ramps - The Armorer - AR15Armory.com So like ORD says it is entirely 100% possible and plenty of people do it, but I would rather not do any work to this perfect barrel. You can post now and register later. This space is for pictures of "retro" Stoner rifles and completed or partial retro AR-15 builds, as well as discussions about either. If I was concerned with precision, I would seek out parts from well-known gun makers and customizers Baer comes to mind, Hart barrels, etc etc. Our 6mm ARC barrel come standard with 1-7.5 Twist, M4 Feed Ramps and gas tube. "C" stamp and CAGE code available. In short, if you have a Dremmel you can do it yourself. CARBON-15 Stripped Lower Receiver Another reason is that any commercial receiver and parts makers want to tool up to make upper receivers and barrel extensions, especially when shorter guns are becoming more popular. The ramps on the regular rifle-type extension are cut just to the edge of the extension. They guide the bullet up and into the chamber.
M4 Barrel Extension (M4 Feedramps) - Bravo Company USA No need to alter the upper. Bullets tend to bump, snag, and stub on these guns. If you have a bolt that you would like to use you are welcome to ship it to us for accurate headspace. It's best to use rifle/rifle combo or M4/M4. I can assure you that most mods that deviate from the original design aren't 100% reliable. I'm assuming that you only need the ramps from one or the other. Mil-spec is good for the masses, and if you want the job done it is a great start. So, an M4 feed ramp includes the barrel extension and the upper. Well, over the course of 5,000 rounds at .40 a round, you spent two grand on ammo. You also repeated yourself. M4 M-4 Feed Ramp Jam with 55 gr grain Bullets, Solution, Fix, AR15 AR-15 Stuck Cartridge iowaunemployment 21K views 10 years ago Comparing AR15 barrels -Faxon vs. Bear Creek arsenal-. Bear Creek Arsenal Barrels - 6.5 Grendel Type 2 Barrel This Gorilla Machining AR-15 16" heavy Black Nitride 6.5 Grendel barrel has a Carbine length gas system with a 1:8 twist. Add M4 cuts to Barrel Ext $15.00 We can modify your rifle extension to match the M4 cuts in an upper receiver. An upper without feed ramps can be used with a barrel that has them as the majority of the ramp is on the barrel extension. Reddit and its partners use cookies and similar technologies to provide you with a better experience. By accepting all cookies, you agree to our use of cookies to deliver and maintain our services and site, improve the quality of Reddit, personalize Reddit content and advertising, and measure the effectiveness of advertising. Either way is good and both types work great with semi auto only guns. Related: If you are using a Ar rifle, best green laser sight is good choice for hunting. so it is better to have an upper reciever that's designed for non-m4 feed ramps since you can put in standard barrels right? The M4 style feed ramps and barrel extension provide consistent feeding and the matte black Manganese Phosphate finish resists external corrosion and oxidation. These Mil-Spec M4 feed ramps are part of the original CNC manufacturing process. I'd rather just pay the gunsmith to make it work than hunt down another barrel/upper if possible.
Rifle vs m4 feed ramps - AR15.COM I think you will find that the tip of the bullet clears the M4 cuts in the upper receiver by a wide margin. The Fora platform includes forum software by XenForo. A closer look at uppers and barrel extensions. They provide a lower, wider, and smoother entry for any round of ammo, whether its necessary or not. Finding the proper upper receiver is your best option. You can run M4 cut barrels with rifle receivers, but not the other way around as it will create at catch that can hang up the bullets. 308 m5 using m4 feed ramps, which I belive are for the smaller round like. Notice how the ramp starts on the barrel extension and not in the receiver. They aid in feeding the round into the chamber from the magazine more easily, which make uppers and barrel extension matched. The M4 ramps, if I am not mistaken, were originally made to help reduce malfunctions on the M4 carbine. We want you, our readers, to be able to make informed decisions. Change the angle so that the ramp ends at the exact same point. Its fine to use an M4 Barrel with a non-N4 (rifle) upper but if you have the barrel already is much simpler to just buy a M-4 upper and just replace the upper the barrel is harder to build..I have even cut ramps on a rifle upper and it really wasent needed That is before I knew better.Then I guncoted the ramps before I found out about Aluminum Black treatment. *Must have a registered ARFCOM account to win. $101.95. 3. I use it for hunting dogs only. You have a rifle barrel.
It's not worth changing the barrel extension on an already finished barrel, getting the new barrel extension to line up correctly with the gas port will probably cost more in gunsmithing/machining fees than buying a new barrel. Press question mark to learn the rest of the keyboard shortcuts. It's going to a gunsmith to be shortened and rethreaded anyways, can they just grind/polish the feed ramps to match or is it more involved than that? I've thought about it myself, and I'd like to see test results if any exist, displaying what reliability effect M4 ramps have on other barrel lengths. Only took a few minutes. I didn't forsee that we'd ever see the day when replacement parts would be so hard to get. BUT, I DO NOT TRUST MY LIFE TO THAT WEAPON. Gun smith said , not head spaced properly. An older-version (or A2-style) feed ramp is cut only on the barrel extension itself (top). It gives a longer ramp that is less steep into the chamber. Not saying a really good gunsmith cant do it, just that theres a bit of an involved process. this is the barrel designed and profiled for the Mark 12 Mod 0 uppers and rifles. To conclude, the M4 feed ramps bring a lot of improvements to the AR-platform firearms. I'm a machinist in the aerospace industry and lucky enough to have. One new winner* is announced every week! Semi autos run slower than full autos. The best case is to have both an upper and barrel that have the feed ramps. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. This 20" BCM barrel is machined from SS410 stainless steel. Please be respectful of others. Some argue that, factually, its a step to enable a smoother feeding. If I have a rifle ramp upper and get the barrel later and coincidentally will have an m4 ramp.
Adding M4 feedramps to A1/C7 upper - M4Carbine.net It is a tightly machined and polished piece of metal which guides a cartridge from the top of the magazine into the firing chamber of the barrel.
Recommend using a gunsmith this route too if you are not comfortable. Feed ramps being m4 or. Somwhere in the 1990s I believe, Colt designed the M4 feed ramps, where they took some of the material out of the upper receiver, cut two little ramps in it and then cut the ramps in the barrel extention a little further forward. There are now thousands of upper receivers and ready-to-use barrels that have the cuts of M4 feed ramps.
RTS Bartlein: 6mm ARC 26" - Compass Lake Engineering, LLC Use this M4 Barrel extention with M4 feedramps. However, an M4 barrel extension is dished more so the feed ramps could extend downward, and then an area within the upper is shaped to match. Earlfillmore 13 hr. The M4 Style Feed ramps And Barrel Extension Provide Consistent Feeding And The Matte Black Manganese Phosphate Finish resists External Corrosion And OxidationLength: 14.70"Model: AR-15Finish: Manganese PhosphateBarrel Type: Carbine LengthBarrel Features: Chrome-LinedManufacturer: FN Mfg Number: 20-100405Model: AR-15 . Those ramps line up with the barrel, which are cut deeper than on a rifle barrel. When I function tested it the first time with live half-jacketed rounds I had the worst FTF jam I have ever experienced. The last is using the best and right ammo for the job. Little polish. And that is the important thing! My factory JP CTR-02 has the appearance of the bottom right picture in the post above, M4 barrel extension in a rifle receiver, and there is not a mark on the aluminum under the barrel extension. Does anyone have a follow up that confirms or denies my claim? Theres a bit more to it than just polishing. 2. Supposedly you'll only notice issues with rapid/auto fire with a configuration like this. Shopping with us is absolutely safe - you never have to worry about credit card safety when shopping here Share your latest AR build or photos from the range with #RangeDayFriday for a chance to win a new firearm! You cannot paste images directly. Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more. 410 stainless is also harder and more corrosion resistant than conventional 416 stainless found in other commercially available precision barrels. By my estimates, the tip of the bullet first hits the barrel extension about 1/3 of the way up the respective feed ramp on the barrel extension.
Feed ramp - Wikipedia Amazing what happens in a thread over a simple question.
6.5 Grendel Type 2 | 16" Black Nitride | 1:8 Twist Carbine Length Gas There's no downside to having M4 feedramps on your carbine, but they are not as necessary without full auto and when using followers that will not tilt (or in a 20 AR15). 's blog.
AR9 - Help diagnosing feeding issue - Calguns.net can the barrel extension be bought individualy?
PSA PA-15 16"M4 Phosphate 5.56 NATO 1/7 Classic AR-15 Rifle with 13.5"M The upper I want to rebarrel is modified for Service Rifle competition so it's not quite as cheap as buying another $89 upper from Aero. The ramp angles are different and changing the profile of the extension doesn't make it something it isn't. if you are OK with 3MOA, you might go 20,000 rounds!
Now, theres nothing wrong at all with a little polish on any and all feed ramps, which can not only be done fairly easily, it can be successfully done by most at home. Check often for fit. Inadequate knowledge about these feed ramps can lead to lots of problems with barrels because they are essential parts to guide the bullet up and into the chamber. I've been thinking about doing sort of an "Early Diemaco C8 carbine" clone build with a C7 style upper receiver.
Ready to drop onto a complete lower receiver. Backing up a ton: The ramps on regular barrel extension are cut just to the edges, while the M4 feed ramps have deeper cuts in the M4-spec upper receiver. i have an extra brand new M4 barrel extension ramp to replace a rifle ramp. M4 feed ramps. Pasted as rich text. All comments are held for moderation and will appear after approval. A feed ramp is a basic feature of many breech loading cartridge firearm designs. They were not intended to be super long range man killers. To measure just where the round makes impact on the feed ramps, I did not use any sort of micrometer to measure. Ok, So, in short, I've got a barrel on my Armalite upper (with M4 feed ramps in the upper) that has standard AR-15 (non-M4) ramps.
Standard vs M4 Feed Ramps, what's the difference #1056 I too built a .458 SOCOM carbine . Here's some info from Randall Rauch aka www.ar15barrels.com, if your barrel extension has M4 ramps you should have an upper receiver also with the ramps. The M4 receiver feed ramps are cut at a steeper angle and, as a result, extend down into the receiver wall. I didnt think anything about it having M4 feed ramps. A shorter gas tube means reduced gas pressure, and we all know what happens when there isn't enough pressure to cycle the bolt carrier group properly. I don't have much to add re: feed ramps, but. from my service in the 70s to my personal weapons, all of my ARs are early 1970 slab sided Colt SP1s. I recently picked up a barrel that I thought had M4 feed ramps, but it doesn't line up with my M4 feed ramp upper. ago KrinkyDink2 9 hr. Snipers Hide is a community of Snipers of all kinds, focusing on long range shooting, accuracy, and ballistics.
Getting the AR Barrel and Receiver Configuration Correct I will check with compass lake. The barrel Throat is the second most critical component after angles and should be polished with utmost care. How long your barrel "lasts" depends on what your accuracy threshold is before you decide it is too bad to keep using. I like all my guns to be reliable. As they are becoming more and more a standard, and certainly do not do any harm to us. Ideally both. The rifle receiver, doesn't have ramps on the receiver, they are only cut into the barrel. I found the article very informative. You wrote that much to make a point that should have taken about 100 words? Its also recommended you polish the ramps once youve achieved the appropriate angle. M4 Barrel Extension (M4 Feedramps) $22.95 (4 reviews) SKU: Barrel-Extension-M4 Stock Status: Quantity: Add to Wish List Description For your AR15, M16, M4. Required fields are marked *. For someone who is new at trying to understand feed ramps it helps to read a couple different explanations. It has 2 ramps cut into the receiver to help the rounds feed into the chamber. The M4 cut extends down beyond the edge of the barrel extension (has a scalloped appearance), and a correspondingly deeper cut in an M4-spec upper receiver effectively extends the ramps downward (theyre lowered). Editors Note: This article was originally published in January of 2019. Try this little exercise: 1. That's an important thing since without the feed ramps, issues can arise when receivers and barrel extensions are mismatched. For this test, I used a Colt upper with M4 feed ramps and a SOCOM heavy 14.5 barrel, just like what is used in the military.
Feed Ramps -300BlkTalk BrianEnos.com One of the AR15 engineers under Gene Stoner pretty much said that the M4 isn't a good platform, especially once the gas port erodes a bit. colt A1E1 733 uppers didn't have extended carbine feedramps ? I'd rather not spent the money to get it cut to the specific length I need, FSB installed, etc just to have it immediately not work and have to sort out then or start from square one with a new barrel. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. So I'm working on my first build, and I'm a little confused. If you consider this article useful, share it with anyone in need! You need to match up barrels to receivers for optimum performance. Anything else you want to share about M4 clones would be appreciated, especially when it comes to a reliable rifle. Regular feed ramps are cuts into the barrel extension only, which allows guiding the round into the chamber during loading, making them a fundamental feature of many breech-loading firearm designs. Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more. Polishing the edges of the chamber mouth to remove the edges of that chamfer will. I am glad to know that I need to look for changes in design and the differences in the A2 and A4 feed ramp / rails. Instead, I just loaded up each mag with two rounds, and pushed the rounds forward by hand until the tip of . The photo shows the dents and the bolt lugs line up perfectly. You want them to match. The barrel extension and the receiver both have to have the cuts.
DoubleStar M4 clone opinions | Survivalist Forum Barrels are Douglas 416 stainless steel with 1-7 twist with M4 feed ramps
AR15 Feed Ramp Cut & Polish Kit - School of the American Rifle AR 15 16" .350 Legend Nitride M4 Profile Barrel 1:16 Additionally, in this increasingly specialized world of AR-15 parts that we live in, there are proprietary feed ramp cuts used for some alternate cartridges, such as .458 SOCOM. Everything that you have on your side to make any weapons more reliable and work when it absolutely needs to is a plus. M4 Feed ramps on barrel extensions are a solid example. Home Firearms Figuring Out Feed Ramps. America's Ultimate Shooting Sports Discounter, Click to share on Facebook (Opens in new window), Click to share on Twitter (Opens in new window), Click to share on Pinterest (Opens in new window). AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types.
Full M4 feed ramps start on the upper and continue onto the barrel extension. Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. BUT if you find someone to grind your feed ramps and they do a good job, post it up and let us know. All NFA rules apply. The difference between standard feed ramps and M4 ramps is easy to see. Barrel Length: 16" Barrel Material: 4150V Chrome Moly Vanadium Steel Barrel Finish: Phosphate Barrel Profile: M4 Chamber: 5.56 NATO Twist Rate: 1 in 7" Extension: M4 Gas System: Carbine-Length Gas Block Type: Low Profile .750" Diameter Upper Receiver: Forged 7075 T6 Aluminum Receiver Style: M4 Flat top with feed ramps Receiver Finish: Hardcoat Anodized The only other time it seems to help is if the mag is feeding the rounds with the bullet slightly angled lower than normal. Does it make a big difference? Seems counter intuitive to recommend an M4 cut upper, especially if the barrel Im looking at has the rifle feed ramp (not M4 cut). You will receive an email every Friday morning featuring the latest chatter from the hottest topics, breaking news surrounding legislation, as well as exclusive deals only available to ARFCOM email subscribers. May 17, 2008 in The Armorer. For a better experience, please enable JavaScript in your browser before proceeding. EDIT: Okay, I understand now! For use by barrel manufacturers. Display as a link instead, Forged 7075-T6 aluminum is harder than a bulls balls. That is what I tell people when they try to convince me that they need a stainless barrel instead of chrome-moly. Man, its crazy how many of yall have absolutely no idea why you do what you do. There are several, but Steve and the guys at ADCO in OH are one such option (they use the Dremel method, but they do it right as I have seen several first-hand examples of their work and its performance after the fact). Looking For Bear Creek Arsenal Barrels Review? upper recievers and barrels are hard to comeby. This gave it a longer point for the magazine to allow the rounds to come out of the magazine and feed into the chamber. These units actually feature the NON-F-Marked (correct) front sight base. JavaScript is disabled. The rifle receiver, doesn't have ramps on the receiver, they are only cut into the barrel. M4 can better explain their benefit, although they help with more reliable feeding. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. As suggested, its best to match the upper and barrel extension no worries that way. which is basicallly an m16a1 cut down. I suggest you get a rifle receiver. I can probably get the upper reciever first. They are better! The best case is to have both an upper and barrel that have the feed ramps. Married pretty well with my Seekins machined lower.
AR-15 Feed Ramp Problems - School of the American Rifle They are also 1/7 twist, 4150 steel, chrome lined, and button rifled like the real deal! You are using an out of date browser.