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I'll probably build a pistol out of this one. Press J to jump to the feed. JavaScript is disabled. Factory said its fine . All Rights Reserved. Adding M4 feedramps to A1/C7 upper - M4Carbine.net Any use of this content without express written consent is prohibited. While I've got everything apart, I'm thinking I just want to put an M4 barrel extension on. BUT if you find someone to grind your feed ramps and they do a good job, post it up and let us know. Polishing the edges of the chamber mouth to remove the edges of that chamfer will. M4 barrel to non M4 receiver is fine, but not the other way around. Dec 17, 2020. We have four combinations here: 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. DSA has fat top, Mueller, non feed ramp uppers for $40. A forum community dedicated to drag racing drivers and enthusiasts. Went back to the sellers website and found I was not the only one with problems. An older-version (or A2-style) feed ramp is cut only on the barrel extension itself (top). 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. Our 6mm ARC barrel come standard with 1-7.5 Twist, M4 Feed Ramps and gas tube. 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. Ideally both. Konza Defender M-LOK 5.56 16" Rifle 1x7 FEATURES: 16" 4150 Nitride 1x7 5.56 Barrel T-Marked Upper with M4 Feed Ramps Steel Micro Gas Block, and Carbine Length Gas Tube 15" 7075 T6 Aluminum Free Float M-LOK Hand Guard A2 Muzzle Break BCG is an M16 Style Nitride QPQ Finish Charging Handle Mil-Spec 6 Position Mil-Spec Diameter Stock Some barrels I see for sale say they include M4 feed ramps, and some uppers say they include them too. AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own. I'm planning on replacing my forearm with a Larue 13.5. And that is the important thing! Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. M4 feed ramp barrel in a non M4 ramp upper - AR15.COM That puts the cartridge in a position where the extended feed ramp improves the breech-loading design. I am having a tough time finding an in-stock barrel (18 or 20 incher) with a rifle extension on it. FN AR-15 5.56X45mm Nato . The first reason is that they are, indeed, better. A4 Complete Upper Receiver. I have a non ramped barrel in a ramped upper, feeds fine. Modify AR15 A2 barrel extension for M4 feed ramp? This USGI modification was done to both the barrel extension and the upper receiver, creating a longer and steeper feed ramp. Our 6.5 Grendel Black Nitride rifle barrels are made from the finest 4150 Chrome Moly Vanadium and precisely rifled for high accuracy at a great price. What is the difference between Modern, Performance, and Premium Series Barrels? pictures would help. Guess what? If it's happening regularly, check the magazines you are using for serviceability. well.. it's kinda hard to get stuff in this part of the world. http://www.ar15fornoobs.com/wp-content/uploads/feedramps.jpg. 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 Required fields are marked *. The tip of the cartridge rarely comes into contact with the upper receiver. Little polish. What's the difference? Thats why AR10s- And Scar heavies exist for. Check often for fit. The only one I found is LaRue's upper, but it won't work with the hand guard I'm using (Geissele MKIII). AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types. When carrying out feed ramp polishing, it is crucial to prioritize the frame's angles, which is a critical part of the feed ramp. Thats true overall and good to keep in mind. 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? The M-16/M4 are great weapons. Barrels are Douglas 416 stainless steel with 1-7 twist with M4 feed ramps Only took a few minutes. The best case is to have both an upper and barrel that have the feed ramps. I think you will find that the tip of the bullet clears the M4 cuts in the upper receiver by a wide margin. Thank you for answering the question do well. By the time you made it work you spent more time, money, and effort than if you just bought a new barrel or upper. 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. Load a magazine with two or three rounds, lock the bolt group back on your rifle or carbine and insert the magazine. However, they do have M4 feed-ramps which is not clone correct. BUT, I DO NOT TRUST MY LIFE TO THAT WEAPON. Clear editor. I would just make sure to order rifle upper with rifle barrel extension or M4 upper with M4 barrel extension. Experts advise on 31 degrees+30 minus-zip. Issues can arise when receivers and barrel extensions are mismatched. M4 feed ramps were created during the development of the xM4 carbine for the original Army requirement of a carbine rifle that used the then current M16A2 upper receiver, 14.5" Barrel and had featured a collapsible sliding stock. and add them to non-m4 barrels.? There are now thousands of upper receivers and ready-to-use barrels that have the cuts of M4 feed ramps. I prefer them. M4 can better explain their benefit, although they help with more reliable feeding. 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). There is no way to make a carbine barrel extension out of a rifle barrel extension, period, full stop. Full M4 feed ramps start on the upper and continue onto the barrel extension. 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 That is what I tell people when they try to convince me that they need a stainless barrel instead of chrome-moly. Feed ramps on barrel extensions are a good example. JavaScript is disabled. If you ever have an issue, then look at getting a correct barrel for the upper. 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. As a result, the factory machined M4 feed ramps on the receiver are hard coat anodized which adds significant strength to the aluminum. Douglas 5.56 Stainless Steel Barrel 18" - 1~7 twist Contents: 1 Diamond Burr (For Colt 2 Stage Ramps) 1 Cut Lube (For Diamond Burr) 1 Bullet Stone (For Reshaping . So, what is the difference between M4 feed ramps and regular ones? check out the. Get The Best Trigger Pull Gauges To Make Every Shot Count. For instance I was looking at the BCM upper receiver, and it said it had M4 feed ramps machined into the upper. AAC and anybody else that has any reasonable expectation of quality and reliability use an M4 feed ramp. The barrel extension and the receiver both have to have the cuts. Please allow 5~10 days for assembly and testing before ship date. Those ramps line up with the barrel, which are cut deeper than on a rifle barrel. As suggested, its best to match the upper and barrel extension no worries that way. The upper is designed to have two levels of top rails for mounting of night vision in front of scopes. After two months of back and forth, cleaned up the feed ramps. Don't forget read more information about it here! But, as with anything else, this work can go too far. Editors Note: This article was originally published in January of 2019. The M4 ramps, if I am not mistaken, were originally made to help reduce malfunctions on the M4 carbine. [ARCHIVED THREAD] - M4 feed ramp barrel in a non M4 ramp upper. Is getting it as part of the upper better? It has ran flawlessly (barring tuning of the gasblock when new) with several different brands of magazines and ammo. Also, barrel life is relative. Its not a big deal but still an important thing to remember and understand. 2. We want you, our readers, to be able to make informed decisions. 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. Hasn't misfed yet, through initial break in up through 1k rounds, and that's mag length ammo. Barrel, sight and trigger work on most pistols and shotguns. 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. The Differences Between an M4 and an AR15 - Music Raiser Backing up a ton: Any and all AR-15 barrel extensions have feed ramps. Some gun owners believe that the M4 ramps can help for some of the larger-diameter cartridges in use. are all barrels w/ m4 feed ramps?? Do you have an AR barrel or feed ramp tip? M4-style barrel extension with Rifle-type upper - Rifle - Technical Does it make a big difference? From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm. The parts are interchangeable. It's best to use rifle/rifle combo or M4/M4. The dimensions are different between the two, so theyd have to change some things to the feed ramps dimensions. which is basicallly an m16a1 cut down. I like all my guns to be reliable. M16's fed pretty well before the M4 feed ramps were introduced. Metal cases ammunition such as Wolf through an M4 clone? Feedramps, proper staking of castle nuts, forward assist (yep went there)S-happens seen it. No Feed Ramps on upper? - General Discussion - 308AR.com Community For use by barrel manufacturers. Everything that you have on your side to make any weapons more reliable and work when it absolutely needs to is a plus. Avoid Polishing Too Lightly Or Too Roughly When you need to nail something you use a hammer not a wrench. Del-Ton, Inc. AR-15 16" M4 Custom Upper BrianEnos.com With a larger diameter case body sitting down in the magazine, the tip of the bullet sits lower in relation to the chamber/bore centerline than with a .223-size round. The M4 receiver feed ramps are cut at a steeper angle and, as a result, extend down into the receiver wall. All this basically means is that the ramps continue from the barrel extension down through the upper receiver tonthe magazine. Upper Receiver, A4, Flat Top, USGI, Numbered, AR-Stoner Upper Receiver Stripped AR-15 A3 Flat-Top Matte, Black River Tactical 16 Cold Hammer Forged Optimum Barrel Accuracy Evaluation. I read in Bravo company that there are 2 kinds of flat top upper. Notify me of follow-up comments by email. Anything else you want to share about M4 clones would be appreciated, especially when it comes to a reliable rifle. 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. 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. Only took a few minutes. Just because you can, doesn't mean you should. Not saying a really good gunsmith cant do it, just that theres a bit of an involved process. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Is it worth the extra 50 bucks?" 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. A couple of times I ended up with the OK set up from the picture above. 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. Finding the proper upper receiver is your best option. The M4 style feed ramps and barrel extension provide consistent feeding and the matte black Manganese Phosphate finish resists external corrosion and oxidation. No need to alter the upper. 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. If your mag catch is at Spec height, you should not have a problem with an M4 cut barrel in a rifle receiver. Other selections are available for upper, bolt and carrier, charging handle, handguards, flash hiders, and gas blocks. from my service in the 70s to my personal weapons, all of my ARs are early 1970 slab sided Colt SP1s. Ready to drop onto a complete lower receiver. I think you will find that the tip of the bullet clears the M4 cuts in the upper receiver by a wide margin. 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. RTS Bartlein: 6mm ARC 26" - Compass Lake Engineering, LLC However, its rare now to find an upper receiver or a ready-to-go barrel that doesnt have the M4 cuts. The extension is the part at the end of the barrel that fits inside the upper. Watch a video about our Modern Series AR barrel: A closer look at uppers and barrel extensions. 410 stainless is also harder and more corrosion resistant than conventional 416 stainless found in other commercially available precision barrels. I will attest that a rifle upper and a barrel with the M4 feedramps works just fine. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. 338 and others not the .308 76251 or 6.5 creedmore which o think should have a.30cal feed ramp.? M4 ramps help in feeding in for carbine in full auto. Home Firearms Figuring Out Feed Ramps. I have a 723 build (w/ C7 upper) and a 727 build (A2 upper) that use 14.5" Colt M4 barrels. This is why you can use a barrel with an extension with M4 feedramps with a receiver that does not have feedramps, but you cannot use a receiver with M4 feedramps with a barrel with an extension with rifle feedramps. Semi autos run slower than full autos. What Are M4 Feed Ramps and What Is The Benefit Of It? - Adventure Footstep I can still use the combination. There are now thousands of upper receivers and ready-to-use barrels that have the cuts of M4 feed ramps. Press question mark to learn the rest of the keyboard shortcuts. Is it kosher to add M4 feed ramps to a standard upper to match an m4 ramped barrel? The rifle receiver, doesn't have ramps on the receiver, they are only cut into the barrel. From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm. I've been thinking about doing sort of an "Early Diemaco C8 carbine" clone build with a C7 style upper receiver. If you don't clean it but demand 3/4MOA you might get 1,500. 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. I recently built an AR9 (Glock Mags) that has been running flawlessly for about 3-400rds. Barrel customizations are also available. Don't ever put non M4 ramped barrel on a M4 ramped upper receiver. All things being equal and having used both weapons extensively, Id rather have the feed Ramps.