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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. M4 can better explain their benefit, although they help with more reliable feeding. The Mission of Cheaper Than Dirt! 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). Please allow 5~10 days for assembly and testing before ship date. 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. Barrel customizations are also available. To measure just where the round makes impact on the feed ramps, I did not use any sort of micrometer to measure. 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. Reddit and its partners use cookies and similar technologies to provide you with a better experience. Then you can get a regular rifle barrel for the upper with no ramps. I too built a .458 SOCOM carbine . and add them to non-m4 barrels.? Avoid Polishing Too Lightly Or Too Roughly 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. I think you will find that the tip of the bullet clears the M4 cuts in the upper receiver by a wide margin. Feed ramps on barrel extensions are a good example. I'm planning on replacing my forearm with a Larue 13.5. But, as with anything else, this work can go too far. Home Firearms Figuring Out Feed Ramps. No need to alter the upper. check out the. First, the M4 barrel and non-M4 upper isnt likely to cause issues, but due to the relief cut on an M4-spec upper, there will be a gap that works like an edge that most definitely can snag the bullet and stub the round. These units actually feature the NON-F-Marked (correct) front sight base. AR9 - Help diagnosing feeding issue. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. I like all my guns to be reliable. True, which is why they're not even needed in semi autos. When you need to nail something you use a hammer not a wrench. I have done the same, protect the Barrel extension with a layer of electrical tape and carefully file or Dremel the ramps into the aluminum receiver. 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. Interesting reading. I wont buy a barrel that isnt a wylde 223 556 but Im only now noticing. Earlfillmore 13 hr. 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. This includes M4 feed ramps, barrel nut, front sight tower and sight post, and -28 threads for a muzzle device. Feedramps, proper staking of castle nuts, forward assist (yep went there)S-happens seen it. The A2's are pretty reliable guns, but trashed mags can cause them to have malfunctions also. We're a little past that point as I already own both the barrel and receiver, both of which cant easily be replaced or swapped for a decent price. 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. It is milled out of 6061 T6. For new construction barrels only. The M4 was the first (allegedy) carbine length gas system. I prefer them. 50 bucks one way or the other on the barrel ain't squat! pictures would help. LanceRiley, Full M4 feed ramps start on the upper and continue onto the barrel extension. 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. 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. Upload or insert images from URL. Check often for fit. Both. M4 Feed ramps on barrel extensions are a solid example. can you buy feed ramps individually? M4 feed ramps. After two months of back and forth, cleaned up the feed ramps. A4 Complete Upper Receiver. That is what I tell people when they try to convince me that they need a stainless barrel instead of chrome-moly. Anodized red parts. So, what is the difference between M4 feed ramps and regular ones? Its also recommended you polish the ramps once youve achieved the appropriate angle. What is an m4 feed ramp? M4 barrel to non M4 receiver is fine, but not the other way around. can the barrel extension be bought individualy? Machined from 4150 Chrome Moly Vanadium Steel and feature a QPQ corrosion resistant finish and QPQ coated M4 feed ramp extension. That's an important thing since without the feed ramps, issues can arise when receivers and barrel extensions are mismatched. I've been thinking about doing sort of an "Early Diemaco C8 carbine" clone build with a C7 style upper receiver. They provide a lower, wider, and smoother entry for any round of ammo, whether its necessary or not. 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). Only took a few minutes. . In short, if you have a Dremmel you can do it yourself. again, Thanks. Is it worth the extra 50 bucks?" I have a non ramped barrel in a ramped upper, feeds fine. so im thinking I might as well just get the unramp upper. Powered by Invision Community, M4-style barrel extension with Rifle-type upper. If I can correct an issue before it's an issue that is preferred. [ARCHIVED THREAD] - M4 feed ramp barrel in a non M4 ramp upper. It has 2 ramps cut into the receiver to help the rounds feed into the chamber. I picked up a side charging upper from Sundevil last year. Those ramps line up with the barrel, which are cut deeper than on a rifle barrel. By the time you made it work you spent more time, money, and effort than if you just bought a new barrel or upper. what does it do?? I had seen these pix years ago and dismissed the idea of mix and match. For a better experience, please enable JavaScript in your browser before proceeding. Create an account to follow your favorite communities and start taking part in conversations. Press question mark to learn the rest of the keyboard shortcuts. And that is the important thing! For the purposes of this chapter, we'll call the new one the M4, and the old one the AR. 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. The information provided here does not represent the views of Cheaper Than Dirt! M16s and M16-A1s run at 750 rounds per minute in full auto. I put together a second AR9 that is having a feeding issue, even if using similar parts as the first one. A closer look at uppers and barrel extensions. However, its rare now to find an upper receiver or a ready-to-go barrel that doesnt have the M4 cuts. They aid in feeding the round into the chamber from the magazine more easily, which make uppers and barrel extension matched. Guess what? Add M4 cuts to Barrel Ext $15.00 We can modify your rifle extension to match the M4 cuts in an upper receiver. -The Barrel MUST be removed from the Upper Receiver in order to use this Kit.-Never cut or polish the aluminum M4 Feed Ramps in your upper receiver! Proper maintenance and lubrication. Other selections are available for upper, bolt and carrier, charging handle, handguards, flash hiders, and gas blocks. Product Description Surplus Colt 14.5" SOCOM, carbine length gas system barrel from Colt. 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! It gives a longer ramp that is less steep into the chamber. Go back to writing school. There is a picture of the various options, hopefully another poster can link them. There is no way to make a carbine barrel extension out of a rifle barrel extension, period, full stop. Display as a link instead, The barrel is supposed to have the M4 feed ramps. JavaScript is disabled. The mil actually only specs M4 feed ramps for use in its M4s. Founded by Frank Galli in 2000, Snipers Hide has been offering informational videos, podcasts, and other support to its users in one location. As a result, the factory machined M4 feed ramps on the receiver are hard coat anodized which adds significant strength to the aluminum. For those who have actually done it will a new barrel with the M4 feed ramp extension function properly with an old school rifle-type upper receiver? 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. This gave it a longer point for the magazine to allow the rounds to come out of the magazine and feed into the chamber. FN AR-15 5.56X45mm Nato . i have an extra brand new M4 barrel extension ramp to replace a rifle ramp. This Kit is made to cut or polish the STEEL Feed Ramps on your Barrel Extension ONLY. Just put it in and shoot it. Your link has been automatically embedded. Seems like it should work to me, but be a real challenge to keep clean and be damned ugly to boot. As suggested, its best to match the upper and barrel extension no worries that way. Add 3% to the total cost for credit card purchases. Ar-15 Manufacturers Should Be Avoided: Which Should You Buy? Absolutely nothing to do with casing diameter, or whatever other weird sht you guys imagine. Some suggest taking a grinder to the extension area. which is basicallly an m16a1 cut down. which is bad combo. I'm lookin for a clear definition as to what they are, and what they do to enhance a given rifle's performance? I wouldn't be concerned at all with any wear after modifying an upper receiver. One new winner* is announced every week! 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. This has been my concern with modifying the aluminum parts. 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. Is one better than the other? M4 feed ramps are not an original design, they were designed for the M4 In fact, the . ago KrinkyDink2 9 hr. #2. I use it for hunting dogs only. The rifle-platform M16s dont use them. Ballistic Performance of Federal Punch .22 LR Ammunition with the Heritage Barkeep #1063. JavaScript is disabled. 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. For instance I was looking at the BCM upper receiver, and it said it had M4 feed ramps machined into the upper. To conclude, the M4 feed ramps bring a lot of improvements to the AR-platform firearms. Edited April 27, 2014 by Mark Gale This includes M4 feed ramps, barrel nut, front sight tower and sight post, and -28 threads for a muzzle device. There are now thousands of upper receivers and ready-to-use barrels that have the cuts of M4 feed ramps. I would just make sure to order rifle upper with rifle barrel extension or M4 upper with M4 barrel extension. Full M4 feed ramps are on both the upper and barrel extension. The Shooter's Log, is to provide informationnot opinionsto our customers and the shooting community. I'm a machinist in the aerospace industry and lucky enough to have unrestricted access to a really nice machine shop so the modification from rifle to M4 feed ramps is no sweat, I've done it once before a few years back with a .250" carbide cutter in the mill for a friend and it came out looking indistinguishable from a true M4 extension. The best case is to have both an upper and barrel that have the feed ramps. Feels like a silly question now that it makes sense. 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. 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. Thank you for answering the question do well. So the engineers lowered the feed rampa into the receiver. Press J to jump to the feed. Required fields are marked *. So, an M4 feed ramp includes the barrel extension and the upper. 338 and others not the .308 76251 or 6.5 creedmore which o think should have a.30cal feed ramp.? I didn't forsee that we'd ever see the day when replacement parts would be so hard to get. Looking for a black stripped A1 upper with non m4 feed ramps (just realized the upper I have wont work with my barrel). You cannot paste images directly. . When you purchase through links on our site, we may earn an affiliate commission, which supports our community. If you want precision, dont look to the mil-spec gun, look to the one that is popular in 3-gun competitions, at Thunder Ranch, etc. Watch a video about our Modern Series AR barrel: For use by barrel manufacturers. Reliability is the main concern for me when I re-barrel this rifle. Mil-spec is good for the masses, and if you want the job done it is a great start. No feed ramps. Remember less is more, little by little. Now move move the on deck cartridge forward to the 3/8 of inch position and again note the position of the tip of the bullet in relationship to the barrel extension. Dec 17, 2020. If this is your first visit, be sure to M4A1s run at 950 rounds per minute in full auto and even 950+ rounds per minute as the gas port erodes open bigger and bigger with wear and allows them to run even faster and much more violent. Feeds flawlessly. I will check with compass lake. Hasn't misfed yet, through initial break in up through 1k rounds, and that's mag length ammo.