5. Caught a deal on a matched barrel and bolt. Press question mark to learn the rest of the keyboard shortcuts. Personally, I would sell the rifle upper and buy an M4 upper - the cost will be small and you will end up with a more satisfactory end product. 3. 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. Please allow 5~10 days for assembly and testing before ship date. pm me at BOG or PG, or get in touch with my number 09177542777 if you're interested. Looking For Bear Creek Arsenal Barrels Review? I think my question would be why rifle receiver+M4 barrel is just "ok" rather than "good", unless the point is that in a carbine-gas gun M4 ramps are just considered an improvement over no ramps. The ramps on the regular rifle-type extension are cut just to the edge of the extension. Forged 7075-T6 aluminum is harder than a bulls balls. I had seen these pix years ago and dismissed the idea of mix and match. i have the rifle barrel. Your email address will not be published. I think your mistaking that with adding ramps to the receiver. The angle is going to be key, alot of people attempt to mimic the angle of the barrel feed ramps, this is incorrect. I was planning on using a Daniel Defense 14.5 pencil barrel, because like the C8 they are CHF, lightweight profile, and .750 at the FSB (And also because quality carbine pencil barrels with .625 gas blocks seem to be in short supplyor else I'd just build a 723 clone.) . Full M4 feed ramps are on both the upper and barrel extension. 14.5" M4 SOCOM Barrel Assembly with Sight Tower - Brownells Subscribe to our monthly Newsletter to receive firearm news, product discounts from your favorite Industry Partners, and more. 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. BCM 14.5" MK2 Upper (Standard) w/ 13" MLOK Handguard - FDE is the m4 feedramp common in barrel extensions? They aid in feeding the round into the chamber from the magazine more easily, which make uppers and barrel extension matched. 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 . Well, over the course of 5,000 rounds at .40 a round, you spent two grand on ammo. 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. How long your barrel "lasts" depends on what your accuracy threshold is before you decide it is too bad to keep using. If a barrel comes with the feed ramps could I take them off? So, an M4 feed ramp includes the barrel extension and the upper. Some gun owners believe that the M4 ramps can help for some of the larger-diameter cartridges in use. 's blog. Get The Best Trigger Pull Gauges To Make Every Shot Count. Upload or insert images from URL. AR9 - Help diagnosing feeding issue - Calguns.net In short, if you have a Dremmel you can do it yourself. 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. CUTTING M4 RAMPS - YouTube 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. This USGI modification was done to both the barrel extension and the upper receiver, creating a longer and steeper feed ramp. Thats receivers, bolts, and on down the list of the 100 or so parts that can make up an AR-15. this is the barrel designed and profiled for the Mark 12 Mod 0 uppers and rifles. The first reason is that they are, indeed, better. So, an M4 feed ramp includes the barrel extension and the upper. First of Im not a gunsmith or firearms professional. I have a 723 build (w/ C7 upper) and a 727 build (A2 upper) that use 14.5" Colt M4 barrels. So I'm working on my first build, and I'm a little confused. 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. Press J to jump to the feed. Don't forget read more information about it here! Gas block area is .750 diameter. I read in Bravo company that there are 2 kinds of flat top upper. M4-style barrel extension with Rifle-type upper - Rifle - Technical Polishing the edges of the chamber mouth to remove the edges of that chamfer will. can the barrel extension be bought individualy? . FN AR15 barrels are hammer forged using the same proprietary high-grade Chrome Moly Vanadium steel used in FN's venerable machinegun barrels produced to handle the punishment of . . True, which is why they're not even needed in semi autos. A couple of times I ended up with the OK set up from the picture above. Avoid Polishing Too Lightly Or Too Roughly He had more to say and added some more engineer and gun designer speak too. Thank you for answering the question do well. There's a 7 degree difference between standard and M4 ramps. If you ever have an issue, then look at getting a correct barrel for the upper. That is what I tell people when they try to convince me that they need a stainless barrel instead of chrome-moly. Create an account to follow your favorite communities and start taking part in conversations. I think you will find that the tip of the bullet clears the M4 cuts in the upper receiver by a wide margin. 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. Barrel FAQs | Ballistic Advantage 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. Editors Note: This article was originally published in January of 2019. I should have taken my own advice for once. Interesting reading. Theres a bit more to it than just polishing. This space is for pictures of "retro" Stoner rifles and completed or partial retro AR-15 builds, as well as discussions about either. BUT if you find someone to grind your feed ramps and they do a good job, post it up and let us know. Some barrels I see for sale say they include M4 feed ramps, and some uppers say they include them too. The last is using the best and right ammo for the job. 30 cal. Copyright 1996-2023 AR15.COM LLC. For a better experience, please enable JavaScript in your browser before proceeding. The parts are interchangeable. And it appears that the bolt is slamming into the top of the bullet. I wouldn't be concerned at all with any wear after modifying an upper receiver. 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. The mil actually only specs M4 feed ramps for use in its M4s. As suggested, its best to match the upper and barrel extension no worries that way. In case My barrel is rifle ramp it won't be so bad after all. 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. Is it kosher to add M4 feed ramps to a standard upper to match an m4 ramped barrel? Ar-15 Manufacturers Should Be Avoided: Which Should You Buy? You will be able to leave a comment after signing in, AR15Armory.com A feed ramp is a basic feature of many breech loading cartridge firearm designs. However, if youre wanting to rebarrel a non-M4-cut upper with an M4 feed-ramp equipped barrel, or going the other direction: you have a new upper thats been relieved to fit with the M4 ramps, and a non-M4-cut barrel extension, and that wont work! Rifle vs m4 feed ramps - AR15.COM M4 feed ramps. i have an extra brand new M4 barrel extension ramp to replace a rifle ramp. I have a non ramped barrel in a ramped upper, feeds fine. Proper maintenance and lubrication. Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. -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! That puts the cartridge in a position where the extended feed ramp improves the breech-loading design. All we do is dremmel it to match - we dont remove it and grind to any specific angle. Any use of this content without express written consent is prohibited. What is the difference between Modern, Performance, and Premium Series Barrels? Del-Ton, Inc. AR-15 16" M4 Custom Upper I would just make sure to order rifle upper with rifle barrel extension or M4 upper with M4 barrel extension. Go slow and you'll be done in no time. Seems like it should work to me, but be a real challenge to keep clean and be damned ugly to boot. Snipers Hide is a community of Snipers of all kinds, focusing on long range shooting, accuracy, and ballistics. Most work performed while-you-wait, evening and saturday appointments available. If your upper isn't showing signs of bullets rubbing on the aluminum under the barrel extension, you should be good with M4 ramps. again, Thanks. 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). The trust part is accepting claims of USGI-spec parts actually being done to not only blueprint dimensions, but also made from the correct materials treated to the same processes. Does it make a big difference? I can probably get the upper reciever first. The Shooter's Log, is to provide informationnot opinionsto our customers and the shooting community. By rejecting non-essential cookies, Reddit may still use certain cookies to ensure the proper functionality of our platform. 11.5", SBN, 1:7, 5.56 NATO Barrel M4 feed ramps are not an original design, they were designed for the M4 In fact, the . Konza Defender M-LOK 5.56 16" Rifle - $399.99 | gun.deals [ARCHIVED THREAD] - M4 feed ramp barrel in a non M4 ramp upper. AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types. Issues can arise when receivers and barrel extensions are mismatched. Check often for fit. If I have a rifle ramp upper and get the barrel later and coincidentally will have an m4 ramp. Getting the AR Barrel and Receiver Configuration Correct M4 feed ramps will extend the barrel extension and the upper receiver. A couple of times I ended up with the OK set up from the picture above. It's best to use rifle/rifle combo or M4/M4. It may not display this or other websites correctly. However Ive built numerous ar15 and lr308 rifles and pistols. There are now thousands of upper receivers and ready-to-use barrels that have the cuts of M4 feed ramps. A forum community dedicated to drag racing drivers and enthusiasts. Then the manufacturer discontinued the barrel. So I'm thinking I ought to have M4 ramps in the gun because based on what I've read: Rifle receiver+M4 barrel = "OK" but not ideal. 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. The difference between standard feed ramps and M4 ramps is easy to see. I built the upper using a Mega upper with a Compass Lake 18" barrel. I recommend putting any AR-platform firearm together with a matched M4 barrel extension and upper receiver set, just because you can. M16s and M16-A1s run at 750 rounds per minute in full auto. The M4, and the CAR-15, before it have had similar problems like the ones you mentioned. 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. well.. it's kinda hard to get stuff in this part of the world. JavaScript is disabled. When you purchase through links on our site, we may earn an affiliate commission, which supports our community. As they are becoming more and more a standard, and certainly do not do any harm to us. But, as with anything else, this work can go too far. When carrying out feed ramp polishing, it is crucial to prioritize the frame's angles, which is a critical part of the feed ramp. AR15 20 inch Upper Receiver Group (SS) w/ Handguard | BCM Required fields are marked *. Ready to drop onto a complete lower receiver. Feed ramps being m4 or. Feed Ramp Polishing - How To Do It Properly? - Homestead & Prepper Figuring Out Feed Ramps | Feed Ramp Tips | The Shooter's Log In this episode of Gun Stock Reviews, we look at the difference between M4 Ramps and the old standard ramps of the past. It's best to use rifle/rifle combo or M4/M4. Description Genuine 14.5" SOCOM, carbine length gas system barrel from Colt. Copyright 1996-2023 AR15.COM LLC. 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. 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? instead of mil-spec. 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. Contents: 1 Diamond Burr (For Colt 2 Stage Ramps) 1 Cut Lube (For Diamond Burr) 1 Bullet Stone (For Reshaping . Seems M4 is all the rage these days. ago Costs about $40-50 to have the feed ramps reprofiled from what I can gather. Cutting M4 feed ramps - Calguns.net Looking to spend $180-250 (depending on condition, forge mark and if a rear sight is included or not.) Thats true overall and good to keep in mind. I've seen that pic, it is a good reference. M4 Barrel Extension (M4 Feedramps) - Bravo Company USA So there's a lot more going on with rounds bouncing up and down in the mags etc. I don't have much to add re: feed ramps, but. I will check with compass lake. Its not a big deal but still an important thing to remember and understand. M4 can better explain their benefit, although they help with more reliable feeding. aaargh.. that's the setup I hate to see. By They . It gives a longer ramp that is less steep into the chamber. This is one time it's better to go a little too far than to leave an edge for the . This 20" BCM barrel is machined from SS410 stainless steel. It's best to have M4 ramps on both the upper and barrel. It's near impossible to replace the carry handle upper I have these days, and finding a colt chrome lined 20" light weight barrel isn't a walk in the park either. All Rights Reserved. I can still use the combination. BCM 16" M4 Carbine Upper Receiver Group | BravoCompanyUSA What Are M4 Feed Ramps and What Is The Benefit Of It? - Adventure Footstep I recently built an AR9 (Glock Mags) that has been running flawlessly for about 3-400rds. Load a magazine with two or three rounds, lock the bolt group back on your rifle or carbine and insert the magazine. Barrels are Douglas 416 stainless steel with 1-7 twist with M4 feed ramps Ideally both. For someone who is new at trying to understand feed ramps it helps to read a couple different explanations. Was sort of worried about how it would run with an 11.5" barrel and mismatched ramps, but it sounds like it should be good to go either way. Amazing what happens in a thread over a simple question. Other selections are available for upper, bolt and carrier, charging handle, handguards, flash hiders, and gas blocks. On AR9's, I understand the distance between the Mag Follower and the Feed Ramp is a known complication in the design. For new construction barrels only. The M4 ramps, if I am not mistaken, were originally made to help reduce malfunctions on the M4 carbine. Thats why AR10s- And Scar heavies exist for. Would not feed to save its life! The rifle-platform M16s dont use them. The best case is to have both an upper and barrel that have the feed ramps. Mind shooting me a link where I can pick on a C marked A1 carry handle for $150? Powered by Invision Community. Modern Series Barrels. I have seen it done many, MANY times and if done right, it works/functions 100% without issue. I've modified barrel/receivers even before M4 cuts came out and done some receivers when the barrels had cuts. Some argue that, factually, its a step to enable a smoother 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 (they're lowered). Most of barrel assemblies and upper receivers on the market now have a present of M4 feed ramps. UPPER RECEIVER: AR-15 Mil-Spec Machined out of 7075-T6 Forged Aluminum, M4 Feed Ramps, Cerakoted Magpul Flat Dark Earth (FDE) Color with Forward Assist and Ejection Port Cover Installed BARREL: 22 inch, 223 Wylde Caliber, 4150 CMV, 1:7 Twist, Heavy Bull Barrel Profile, Straight Fluted, Melonite/Nitride Finish - made for us by Tactical Kinetics HAND I picked up a side charging upper from Sundevil last year. pictures would help. The only one I found is LaRue's upper, but it won't work with the hand guard I'm using (Geissele MKIII). For instance I was looking at the BCM upper receiver, and it said it had M4 feed ramps machined into the upper. FN AR-15 5.56X45mm Nato 14.70" M4 Profile Barrel Carbine Length Gas M4 Feedramps - AR-15 Pro Our 6mm ARC barrel come standard with 1-7.5 Twist, M4 Feed Ramps and gas tube. Should M4 feed ramps come with the barrel or upper? : r/ar15 - reddit $101.95. 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. They provide a lower, wider, and smoother entry for any round of ammo, whether its necessary or not. 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. 6.5 Grendel Type 2 | 16" Black Nitride | 1:8 Twist Carbine Length Gas The Bullet ~ Handguns, Rifles and Shotguns, http://thearguys.com/ar-facts/m4-feed-ramps/. Mind shooting me a link where I can pick on a C marked A1 carry handle for $150? The barrel is supposed to have the M4 feed ramps. They offer a lower, more extensive, and smoother entry for any round of ammo, whether its necessary or not. I prefer them. The only other time it seems to help is if the mag is feeding the rounds with the bullet slightly angled lower than normal. I use it for hunting dogs only. Come join the discussion about racing, builds, pro mods, hot rods, events, turbos, nitrous, superchargers, and more! Supposedly you'll only notice issues with rapid/auto fire with a configuration like this. After two months of back and forth, cleaned up the feed ramps. Notify me of follow-up comments by email. 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. The manufacturer said they had sold hundreds of barrels with out problems reported. 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. Hasn't misfed yet, through initial break in up through 1k rounds, and that's mag length ammo. The magazine lips cannot move, so with these larger diameter cartridges, the bullet tips down lower about the centerline of the bore (half of the diameter increase to be exact). 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. Can I use a barrel with M4 feed ramps with an upper that isnt M4 matched? I am having a tough time finding an in-stock barrel (18 or 20 incher) with a rifle extension on it. . Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. For the purposes of this chapter, we'll call the new one the M4, and the old one the AR. Use this M4 Barrel extention with M4 feedramps. These Mil-Spec M4 feed ramps are part of the original CNC manufacturing process. Higher pressure equte to parts (bcg, buffer, buffer spring, ROUNDS, etc) experiencing much higher wear/tear. So the engineers lowered the feed rampa into the receiver. 308 m5 using m4 feed ramps, which I belive are for the smaller round like. SKU: BCM-URG-M4-16 Features: M4 Feed Ramp Barrel Extension Caliber: 5.56 NATO Barrel Length: 16in Barrel Style: Standard Handguard: None BCM M4 Handguards (Double Heat Shield) - Black + $15.00 PKMR (Polymer KeyMod Rail) Carbine Length - Black + $24.95 PKMR (Polymer KeyMod Rail) Carbine Length - Flat Dark Earth + $24.95 Stock Status: Out of stock
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