Standard vs M4 Feed Ramps, what's the difference #1056 AR9 - Help diagnosing feeding issue. Some, me included, have said that the M4 ramps are a help to some of the larger-diameter cartridges in use, such as 6.5 Grendel or .22 Nosler. Press J to jump to the feed. 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? Went back to the sellers website and found I was not the only one with problems. AR9 - Help diagnosing feeding issue - Calguns.net PSA PA-15 16"M4 Phosphate 5.56 NATO 1/7 Classic AR-15 Rifle with 13.5"M Single Action and Double Action Which One Is Better For You? So, an M4 feed ramp includes the barrel extension and the upper. Notice how the ramp starts on the barrel extension and not in the receiver. M4 Feed ramps on barrel extensions are a solid example. Earlfillmore 13 hr. instead of mil-spec. Feels like a silly question now that it makes sense. If it's happening regularly, check the magazines you are using for serviceability. The Mission of Cheaper Than Dirt! As a result, the factory machined M4 feed ramps on the receiver are hard coat anodized which adds significant strength to the aluminum. The M4 ramps, if I am not mistaken, were originally made to help reduce malfunctions on the M4 carbine. Anodized red parts. To measure just where the round makes impact on the feed ramps, I did not use any sort of micrometer to measure. Machined from 4150 Chrome Moly Vanadium Steel and feature a QPQ corrosion resistant finish and QPQ coated M4 feed ramp extension. upper recievers and barrels are hard to comeby. 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. Costs about $40-50 to have the feed ramps reprofiled from what I can gather. The best case is to have both an upper and barrel that have the feed ramps. M855A1 5.56mm NATO Penetrator Ammo Feed Ramp Issues: Real, Hype or just The rifle-platform M16s dont use them. I put together a second AR9 that is having a feeding issue, even if using similar parts as the first one. 30 cal. EDIT: Okay, I understand now! I'm a machinist in the aerospace industry and lucky enough to have. 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. There is a picture of the various options, hopefully another poster can link them. Full M4 feed ramps start on the upper and continue onto the barrel extension. What Are M4 Feed Ramps and What Is The Benefit Of It? - Adventure Footstep Sorta. So, what is the difference between M4 feed ramps and regular ones? Which Model Colt 1911 is For Me? 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. This includes M4 feed ramps, barrel nut, front sight tower and sight post, and -28 threads for a muzzle device. 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. They are better! As suggested, its best to match the upper and barrel extension no worries that way. The rifle receiver, doesn't have ramps on the receiver, they are only cut into the barrel. You absolutely do not want it the other way around however. Either way is good and both types work great with semi auto only guns. 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. You cannot paste images directly. Snipers Hide is a community of Snipers of all kinds, focusing on long range shooting, accuracy, and ballistics. In this episode of Gun Stock Reviews, we look at the difference between M4 Ramps and the old standard ramps of the past. M4 feed ramp barrel in a non M4 ramp upper - AR15.COM Is getting it as part of the upper better? I recommend putting any AR-platform firearm together with a matched M4 barrel extension and upper receiver set, just because you can. Some suggest taking a grinder to the extension area. practical_man 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. I replaced the M4 feed ramp barrel with a monolithic feed ramp barrel and no more problems. P2A PATRIOT 22" 223 Wylde 1/7 Rifle Length Melonite Fluted Heavy Bull 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. 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 . Not saying a really good gunsmith cant do it, just that theres a bit of an involved process. By A4 Complete Upper Receiver - 7075 Forged A4 Flat Top Upper Receiver - M4 Feed Ramps Includes: - Add to Cart. 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 Should M4 feed ramps come with the barrel or upper? : r/ar15 - reddit The last is using the best and right ammo for the job. The tip of the cartridge rarely comes into contact with the upper receiver. So, lets glide down these lines below to erase your misconceptions about them. 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. Bullets tend to bump, snag, and stub on these guns. You are using an out of date browser. I built the upper using a Mega upper with a Compass Lake 18" barrel. 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. Ar-15 Manufacturers Should Be Avoided: Which Should You Buy? Semi autos run slower than full autos. He had more to say and added some more engineer and gun designer speak too. Mind shooting me a link where I can pick on a C marked A1 carry handle for $150? All Rights Reserved. Feed ramps being m4 or. 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. A forum community dedicated to drag racing drivers and enthusiasts. - The Shooter's Log, 2012 SHOT Show Special Report: Daniel Defense DDM4 V5 in .300 Blackout and a Factory SBR - The Shooter's Log, 2012 SHOT Show Special Report: SOG Armory Predator Rifle - The Shooter's Log, Surefire's 100-Round MAG5-100: The Highest Capacity AR-15 Magazine - The Shooter's Log, Throwback Thursday: Taurus Judge Range Report, ATI Milsport SGA 410 All the Advantages of an AR in .410, Ruger SR1911 LW Commander The Lightweight .45 ACP, Rifle Hack: Sighting for 100 Yards at a Distance of 25 Yards, Throwback Thursday: All About Bullet Grain. Thats an important thing since without the feed ramps, issues can arise when receivers and barrel extensions are mismatched. Guess what? 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. Pasted as rich text. You can post now and register later. This 20" BCM barrel is machined from SS410 stainless steel. All comments are held for moderation and will appear after approval. I just need a little guidance on this and I'm having trouble getting good results from Google. May 17, 2008 in The Armorer. The Differences Between an M4 and an AR15 - Music Raiser M16s and M16-A1s run at 750 rounds per minute in full auto. 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. Ballistic Performance of Federal Punch .22 LR Ammunition with the Heritage Barkeep #1063. Only took a few minutes. Get The Best Trigger Pull Gauges To Make Every Shot Count. Is it kosher to add M4 feed ramps to a standard upper to match an m4 ramped barrel? Surplus Colt 14.5 M4 SOCOM Carbine Barrel 1/7 Twist Don't ever put non M4 ramped barrel on a M4 ramped upper receiver. The only one I found is LaRue's upper, but it won't work with the hand guard I'm using (Geissele MKIII). The ramp angles are different and changing the profile of the extension doesn't make it something it isn't. 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. I picked up a side charging upper from Sundevil last year. ago KrinkyDink2 9 hr. They are also 1/7 twist, 4150 steel, chrome lined, and button rifled like the real deal! Sent back again. 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). My experience with ARs is all A-1s. Insert the barrel and sharpie the cut area, then use the right bit on a dremel. You wrote that much to make a point that should have taken about 100 words? There is no way to make a carbine barrel extension out of a rifle barrel extension, period, full stop. You also repeated yourself. Using an upper with M4 feed ramps with a barrel that does not have them will lead to feed problems as it creates a ledge/lip that can catch the bullet tip as it tries to feed. If I can correct an issue before it's an issue that is preferred. Seems M4 is all the rage these days. Sign up for the ARFCOM weekly newsletter and be entered to win a free ARFCOM membership. 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. Brevity matters. This Kit is made to cut or polish the STEEL Feed Ramps on your Barrel Extension ONLY. It was in the last few issues of SAR. Some barrels I see for sale say they include M4 feed ramps, and some uppers say they include them too. I've been thinking about doing sort of an "Early Diemaco C8 carbine" clone build with a C7 style upper receiver. Editors Note: This article was originally published in January of 2019. Full M4 feed ramps start on the upper and continue onto the barrel extension. Moreover, telling someone that an extension can be modified, while not a lie, is nothing more than mental masturbation when your post contains a caveat for having the knowledge and proper tools. If you don't clean it but demand 3/4MOA you might get 1,500. Does anyone have a follow up that confirms or denies my claim? "A Bad Day At The Range Is Better Than A Great Day Working". You need to match up barrels to receivers for optimum performance. These Mil-Spec M4 feed ramps are part of the original CNC manufacturing process. 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. - The Shooter's Log, 2012 SHOT Show Special Report: Del-Ton TRX Rifle and More! AR15.COM is the world's largest firearm community and is a gathering place for firearm enthusiasts of all types. Those ramps line up with the barrel, which are cut deeper than on a rifle barrel. M4 ramps help in feeding in for carbine in full auto. Watch a video about our Modern Series AR barrel: Thank you for answering the question do well. Mind shooting me a link where I can pick on a C marked A1 carry handle for $150? Any use of this content without express written consent is prohibited. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. 1 is a standard and the other for use with m4 feed ramp barrels. Everything that you have on your side to make any weapons more reliable and work when it absolutely needs to is a plus. Douglas 5.56 Stainless Steel Barrel 18" - 1~7 twist A closer look at uppers and barrel extensions. 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).
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