I'm assuming that you only need the ramps from one or the other.
AR15 Feed Ramp Cut & Polish Kit - School of the American Rifle AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own. To measure just where the round makes impact on the feed ramps, I did not use any sort of micrometer to measure. Theres a bit more to it than just polishing. Press J to jump to the feed. All NFA rules apply. M4 Feed ramps on barrel extensions are a solid example. I'm lookin for a clear definition as to what they are, and what they do to enhance a given rifle's performance? If you have a m4 ramped upper but not barrel you can cause problems as there's a lip of steel barrel extension in the way that can cause feeding problems. The Shooter's Log, is to provide informationnot opinionsto our customers and the shooting community. In general, all you need to understand is that the M4 feed ramps include the barrel extension and upper receiver. That puts the cartridge in a position where the extended feed ramp improves the breech-loading design. Barrel, sight and trigger work on most pistols and shotguns. If your magazines are set up correctly, and the feed lip edges polished smooth, each round fed from the magazine will go directly into the chamber.
AR9 - Help diagnosing feeding issue - Calguns.net again, Thanks. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada.
I'm a machinist in the aerospace industry and lucky enough to have. Full M4 feed ramps start on the upper and continue onto the barrel extension. The M4 was the first (allegedy) carbine length gas system. Thanks for explaining the feed ramp topic in a couple of different ways. Both. A forum community dedicated to drag racing drivers and enthusiasts. AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types. 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).
11.5", SBN, 1:7, 5.56 NATO Barrel The rifle-platform M16s dont use them. 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. The ramp angles are different and changing the profile of the extension doesn't make it something it isn't. 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. This is one time it's better to go a little too far than to leave an edge for the .
Cutting M4 feed ramps - Calguns.net Semi autos run slower than full autos. FFL Fax: 866-721-8691. i have an extra brand new M4 barrel extension ramp to replace a rifle ramp. Married pretty well with my Seekins machined lower. M16's fed pretty well before the M4 feed ramps were introduced.
AR Tech Tip - Checking M4 Ramps for overhang - YouTube We reserve the right to edit as appropriate, delete profane, harassing, abusive and spam comments or posts, and block repeat offenders.
P2A PATRIOT 22" 223 Wylde 1/7 Rifle Length Melonite Fluted Heavy Bull AR 15 16" .350 Legend Nitride M4 Profile Barrel 1:16 How to Clone the M16A2 Rifle - The New Rifleman Douglas 5.56 Stainless Steel Barrel 18" - 1~7 twist You wrote that much to make a point that should have taken about 100 words? Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. 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. So, what is the difference between M4 feed ramps and regular ones? You can always buy a non-m4 extension and have the new barrel retimed and headspaced, but it will probably cost more than a new upper receiver.
AR-15 feed ramp issues - Rifle - Technical - Brian Enos's Forums It's an interesting question. On the other hand, I wouldn't consider them as a deal breaker, and they would not pass up a good deal with an upper only because it did not have them - the M4 feed ramps. Either way is good and both types work great with semi auto only guns. All Rights Reserved. There is no way to make a carbine barrel extension out of a rifle barrel extension, period, full stop. Its also recommended you polish the ramps once youve achieved the appropriate angle. M4 Feed ramps on barrel extensions are a solid example.
CUTTING M4 RAMPS - YouTube However Ive built numerous ar15 and lr308 rifles and pistols. Will my A3 upper reciever work with my M4 barrel extention.According to some or your posts they will.Thanks Bill. I read in Bravo company that there are 2 kinds of flat top upper. Does it make a big difference? Single Action and Double Action Which One Is Better For You? BUT if you find someone to grind your feed ramps and they do a good job, post it up and let us know. Can someone recommend or point me in the right direction of a good quality upper receiver for an SPR build that does not have M4 feed ramp cuts in it? These units actually feature the NON-F-Marked (correct) front sight base. You absolutely do not want it the other way around however. These Mil-Spec M4 feed ramps are part of the original CNC manufacturing process. I too built a .458 SOCOM carbine . 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. 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. Olympic Arms Upper receiver with rear sight assembly and forward assist and dust cover has M4 feed ramps $260 View attachment 1016575 View attachment 1016576 The tip of the cartridge rarely comes into contact with the upper receiver. You CAN modify a rifle/A2 barrel extension to an M4 style extension, but it isn't always the best way to go unless you just have to do it. How long your barrel "lasts" depends on what your accuracy threshold is before you decide it is too bad to keep using. Please be respectful of others. This Kit is made to cut or polish the STEEL Feed Ramps on your Barrel Extension ONLY. A closer look at uppers and barrel extensions.
Do you need an M4 feed ramp on your AR? Here is some info. this is the barrel designed and profiled for the Mark 12 Mod 0 uppers and rifles.
The Differences Between an M4 and an AR15 - Music Raiser The first reason is that they are, indeed, better. A feed ramp is a basic feature of many breech loading cartridge firearm designs. M4 ramps help in feeding in for carbine in full auto. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. If your upper isn't showing signs of bullets rubbing on the aluminum under the barrel extension, you should be good with M4 ramps. AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types. 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. If you consider this article useful, share it with anyone in need!
Upper Receiver WITHOUT M4 Feed Ramp Cuts? - Sniper's Hide Forum Does NOT include pin The reason I decided to write about this topic at all was because there are some mil-spec features advertised on aftermarket parts that arent even really mil-spec. Gas block area is .750 diameter. 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. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. colt A1E1 733 uppers didn't have extended carbine feedramps ? 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. and add them to non-m4 barrels.? The M-16/M4 are great weapons. Bullets tend to bump, snag, and stub on these guns. I have a 723 build (w/ C7 upper) and a 727 build (A2 upper) that use 14.5" Colt M4 barrels. All uppers are assembled cleaned and tested before shipping. Most work performed while-you-wait, evening and saturday appointments available. We have four combinations here: It is removeable with a special wrench and a barrel clamp/vise. Your link has been automatically embedded. 30 cal. Load a magazine with two or three rounds, lock the bolt group back on your rifle or carbine and insert the magazine. What is the difference between Modern, Performance, and Premium Series Barrels? Proper maintenance and lubrication. Avoid Polishing Too Lightly Or Too Roughly Feed ramps on barrel extensions are a good example. There is a picture of the various options, hopefully another poster can link them.
M4-style barrel extension with Rifle-type upper - Rifle - Technical I like getting another Upper idea then you could end up with two rifles! 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. I've shot a good deal of rounds through 20" A2's and I realize they run but you are describing issues that the M4 feed ramps alleviate, that would probably be good to reduce on A2's as well. Since the M4 barrel is one and a half inches shorter than the minimum legal barrel you can install in an AR15, the M4 gas tube will be, of course, smaller. That's an important thing since without the feed ramps, issues can arise when receivers and barrel extensions are mismatched. For someone who is new at trying to understand feed ramps it helps to read a couple different explanations. 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 . Seems like it should work to me, but be a real challenge to keep clean and be damned ugly to boot. I'd get jams from bullets hitting the back of the upper so I took a small round file and made the M4 ramps in the upper. Man, its crazy how many of yall have absolutely no idea why you do what you do. I can assure you that most mods that deviate from the original design aren't 100% reliable. The last is using the best and right ammo for the job. I think your mistaking that with adding ramps to the receiver. Pasted as rich text. There are now thousands of upper receivers and ready-to-use barrels that have the cuts of M4 feed ramps.
6.5 Grendel Type 2 | 16" Black Nitride | 1:8 Twist Carbine Length Gas Del-Ton, Inc. AR-15 16" M4 Custom Upper well.. it's kinda hard to get stuff in this part of the world. As a result, the factory machined M4 feed ramps on the receiver are hard coat anodized which adds significant strength to the aluminum. Costs about $40-50 to have the feed ramps reprofiled from what I can gather. 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. Im an old vet, now retired and looking to build some ARs as a hobby to keep me doing something that I will enjoy. Create an account to follow your favorite communities and start taking part in conversations. No need to alter the upper. So there's a lot more going on with rounds bouncing up and down in the mags etc. Here you can see an upper with "rifle" feedramps. 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. Given that most of us dont always have perfect access to truly genuine Mil-Spec, mil-standard parts (those actually used in issued fighting tools), were shopping based on a little part trust and a bigger part knowledge. Seems counter intuitive to recommend an M4 cut upper, especially if the barrel Im looking at has the rifle feed ramp (not M4 cut). This can lead to a rare but odd situation; barrel and receiver mismatch. Any body need a anchor for a very small boat? The leading cause that leads to the development of the M4 feed ramp is the gas pressure from the carbine gas system that is increasing along with a high cyclic rate. Notify me of follow-up comments by email. The difference between standard feed ramps and M4 ramps is easy to see. Caught a deal on a matched barrel and bolt. 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. You need to match up barrels to receivers for optimum performance. can you buy feed ramps individually? Is it kosher to add M4 feed ramps to a standard upper to match an m4 ramped barrel? Press J to jump to the feed. .
Can I use a barrel with M4 feed ramps with an upper that isnt M4 matched? Use this M4 Barrel extention with M4 feedramps. . *Must have a registered ARFCOM account to win. The photo shows the dents and the bolt lugs line up perfectly. Thanks.
RTS Bartlein: 6mm ARC 26" - Compass Lake Engineering, LLC You will be able to leave a comment after signing in, AR15Armory.com A couple of times I ended up with the OK set up from the picture above. 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!