m4 feed ramps vs no feed ramps

m4 feed ramps vs no feed ramps

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. I have a Mega upper and a Compass Lake barrel that I assembled. What's new. dieselpower. Barrel Type 16 M4 Profile with M4 Feed Ramps. But just like full auto bolts vs. semi-auto bolts they have no impact on the function or reliability of a semi-auto rifle. Either one of the two fixes woukd have solved the propblem but bothe were adopted. M4 feed ramps will extend the barrel extension and the upper receiver. To repeat the above, you CAN use barrels with M4 feedramps on your upper without, just not the opposite (upper with ramps, barrel without). Id It may not be as fast but all you really need to do is get everything smooth.The smoother the feed ramps the less amount of friction the cartridge works against on it way into the chamber. If barrel manufacturers delivered a single large feed ramp and 1/8 gas port hole in the barrel, almost all the issues would be resolved. M4-type barrel extension has NiB-X finish that aids in smooth locking and unlocking with the bolt, consistent feeding and helps prevent hang-ups. 1 Microfiber Towel. NOTE: The Barrel MUST be removed from the Upper receiver for this Service to be performed. A feed ramp is a basic feature of many breech loading cartridge firearm designs. I made a goof. The Feed ramps on the cheap $72 dollar barrel are pretty rough. I talked to a guy that I used to work with who was in the military and he told me that he even had problems with 30 round mags w/ hollow points. - Colt manufactured 20" A2 style barrel, 5.56 NATO with M4 feed ramps and 1/7 twist rate. Machined from billet 7075-T6 aluminum vs. the more commonly used 6061 for a 70% increase in strength. Do any of you guys know where I can find barrels with such extensions? "Standard" (old) ramps are only cut into the barrel extension. I have a 14.5" barrel with m4 feed ramps and recently had a comp pinned on, gas system has been installed and it has been torqued onto the upper. Equally ideal for a Retro or Modern Build this barrel is also quite popular with Law Enforcement in Airports and on Motorcycles. The ramps can also be polished with emery paper 600 grit and crocus cloth wrapped around a 1/4" dowel. Please note that this upper receiver does NOT have M4 feed ramp cuts. Even if you are Whats hot on Task & PurposeA Marine was asked how many people have you killed? His response was perfectAbandoned Air Force base with underground tunnels posted for sale on FacebookAir Force maintainers are getting new janitor grey coverallsThe Marine Corps is officially flying its most powerful helicopter everMore items By John Travis. Sorry for noob questions. Features an A1 style fixed carry handle and shell deflector. 659. NO rear sight, charging handle, bolt carrier assembly or carry handle. TNTE Assembled A1 Upper Receiver . Can also see where they cut into the chamber from the left side feed ramp. Quality M4 upper receiver with M4 feed ramps without T-engraving. 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.The feed ramp may be part of the magazine (), part of the receiver or frame (), or part of the barrel ().Some firearms, like the FN Five-seven, have a beveled Due to this feature, M4 has some problems in reducing pressure. If you have a bolt that you would like to use you are welcome to ship it to us for accurate headspace. AR-15 feed ramp issues. You wont be using a grenade launcher. CALL FIRST! I have an occasional jamming issue that I think is related to the M4 feed ramps. The standard m4 ramps are just a tiny bit narrow and steep for a round nose bullets. (Well overlook for the moment that the front sight is probably also a problem, but thats a different chapter.) Today when people talk about these various styles, they often use A2 to refer to an upper receiver that has a fixed carrying handle and an A4 to mean a receiver that has a flat top picatinny rail. Part# M0304 with M4 feed ramps M.S.R.P. The AR15 Assembled Upper Receiver is one of our most popular products. M4 feed ramps fall into the "nice but not necassary" category. You wont be using a grenade launcher. 31 August 2009, 11:50 #2. bigcoastie. View Profile. However their greatest difference is price. Chamber 5.56 NATO. PDA. View Full Version : M4 Feed ramps. Factory Colt M4 Commando profile, 11.5 inch, 5.56x45mm NATO, carbine length gas system barrel. Almost impossible to get the right angle for a pic with the barrel installed in a receiver, but if you zoom in you can see how uneven the inverted V in between the feed ramps was ground, and how uneven the outside ends of the feed ramps were ground. I'm familiar with the whole m4 vs rifle thing, but my extension looks like it has m4 style ramps to me. However a good polish job made them so slick that it doesn't matter if the bullet smacks straight into the ramp. dcsans. Only show this user. Maybe wider than m4, for the larger cartridge? The first thing to understand is that the angles of the frame and barrel rampaka Feed Ramp and Barrel Throat are critical, with the former being the most critical. M4 style feed ramps are a good idea if you elect to use heavier, (i.e. 69-80 grain), slightly longer 5.56 cartridges in any weapon, be it rifle or carbine, select fire or semi automatic as the ramp design makes it less likely the round will impact on the roof of the chamber as it feeds driving the bullet back into the case and raising chamber pressure on ignition to potentially dangerous levels. As the photos show there is a step that has developed nicks on the barrel extension and upper interface. FMJ. As you can see, there is very little difference between the two options. If I was building or buying a 16 upper, I would not go with the carbine length gas system. Barrel Material Chrome Lined 4140 Steel. Why polishing the feed ramp on a Government Model is a bad idea. Engineers introduced longer feed ramps that carried into the lower receiver and the M4 feed ramps were born. There are many, many other options, so a well-equipped BMW M4 can easily jump to $124,500. If we compare the base price of the new BMW M4 to that of the two direct competitors we notice the Audi RS5 is the most expensive, with a starting price of $ 104,475, while the Mercedes-Benz C63 AMG Coupe has a closing price to that of the M4. The M4 feed ramp is a modification to the two feed ramps that guide the nose of the bullet and casing into the breach of the chamber. Spurrious. M4 feed-ramps help ensure reliability with old, crappy magazines. Now:$249.00 - $459.00. I finally got tired of the bullets hitting the feed ramps and decided to cut some M4 style ramps in this rifle. Private Message. In proportion with the shorter barrel, the M4 has a shorter gas tube. Not M4 feed ramps. So fast that the magazines had issues with feeding. M4 refers to long ramps as seen on M4A1 full auto. Id Stags have no M4 feed ramps. Home. Longer feed ramps were machined into both surfaces, therefore, providing a more gradual transition from magazine to chamber. 16 A2 Sight Tower Upper M4 Carbine Length Chrome Moly Nitride Processed. There are also the old original "slick side" uppers that have no forward asst and no brass deflector. LaRue Tacticaluppers do not use M4 feed ramps and had some pretty valid reason for not using them. New posts New media New media comments Featuring M4 feed ramps, this upper receiver is machined to Military Specifications & Standards and can be used with multiple calibers on the AR-15 platform. Forums. Gas Block Military-spec Front Post. BSF Barrel, No Handguard. What is different between AR15 vs M4? The AR-15 and M4 receivers may look the same, but M4 has improved feed ramps. The Faxon Barrel is MPI tested and Nitride coated. After they started on the XM4 project in the early 80s they started cutting the extended M4 feed ramps in all of their carbine models. yes they are all m4 feed ramps in barrel and upper also I bought the mags all reconditioned with all new internals they are pre-ban. 1 Pair of Black Nitrile Industrial Strength Gloves. To compensate for the shorter gas tube, the M4 also has modified feed ramps. 31 degrees +30 minutes zip. You have the standard that was there with the beginning of the AR-15, M-16, M-16A1, A2all the earlier guns when you had a full-sized barrel. The upper receivers M4-style feed-ramp cuts (top, arrows) are indicative of a later AR design. Here is a link to finding "The Best AR". The A1 carry handle is ready for adjustable rear sight. Description. I'd just shop for the barrel you want, regardless of the ramps (although without would probably look nicer!) 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. What do you mean standard feed ramps on the extension? The differences between the two are extremely small. M4 feed ramps occur from the receiver on into the barrel extension. This OEM manufacturer makes receivers for many other brands from quality forgings, like Anchor Harvey forgings (aka split-A), Cerro (aka keyhold forge), Brass Aluminum and Mueller. Melonite is similar to nitride treatment, as previously discussed. Comes with the standard features of a Mil-Spec upper receiver and is forged from 7075-T6 aluminum with a black hard coat anodized, tough finish. The mindless milspec minions have to have them because, well, its not milspec without M4 feedramps. It is a shortened version of the M16A2 assault rifle.. -Forward Assist & Port Door Assembly Not Included. New posts Search forums. For the semi-automatic that we are using, the M4 ramp is a gimmic in my book. It makes double feeds more prone to happen. Add in some dedicated 7.6239 magazines and you are good to go. This is a quality mil spec M4 / AR15 upper receiver with hardware, but no BCG or chagrining handle. View Forum Posts. To measure just where the round makes impact on the feed ramps, I did not use any sort of micrometer to measure. This 1:7 twist Noveske Recon model is cold-hammer forged and comes with extended M4 feed ramps, but does drop a little on the higher side with an MSRP of $600. M4 feed ramps were developed for the military’s select fire M4. I believe all AR's had feed ramps. All flat top receivers (with maybe a hand full of exceptions) should have M4 feed ramps in them. An AR barrel in a M4 receiver, however, has steeper feed ramps cut into the receiver wall, with less-steep ramps cut into the barrel extension. New Posts w/o WC. Unlike our standard AR15 Assembled Upper Receiver, this specific model does not have machined M4 feedramps. Either one of the two fixes woukd have solved the propblem but bothe were adopted. For a civilian the two barrel profiles will work out the same. This high-tech coating lasts the life of the weapon, and wont rub off, flake off, or gall. You have the option of barrel type, thread, fluting, finish type and to add a matched bolt. I thought it was supposed to be a more pronounced groove. The military made the modification to the M4 because it was having feeding problems during full auto fire. As the magazine springs age, they may not push the next round to the top of the magazine feed-lips as quickly as when they were new. My understanding is that in very rare cases you can end up rounds jamming in the sharp lip formed in the gap between receivers M4 ramps and the barrels "rifle" style ramps. 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. The standard AR rifle type feed ramp is a 45 degree cut into the bottom of the breach of the barrel. 05-08-2013, 02:45 AM. I have never seen an AR of any configuration become a problem child because of the lack of M4 feedramps when running nothing but 55 or 62 gr. Forged from 7075 aluminum that has been T6 heat treated and hard coat anodized (Mil-A-8625A). Upper receiver comes stripped without ejection port cover, forward assist or rear sight. - 20" barrel with A2 type birdcage flash hider, and chrome lined bore. They give the option for A2 or M4 feed ramps for an additional fee (M4 is an additional $10). Full M4 feed ramps start on the upper and continue onto the barrel extension. Variable #9 - M4 Feed Ramps vs. Rifle Feed Ramps All AR-15s have feed ramps that allow rounds from the magazine to move smoothly to the chamber, and these days, almost all have the improved M4 feed ramps, so this isn't a common troubleshooting point anymore. Now if your barrel has standard rifle ramps, DO NOT get a receiver with M4 ramps, as JonM said. RRA doesn't use them either. 3 Bullet-Shaped Felt-Tipped Dremel Polishing Bits. There are (and have been for years) several manufacturers making A1 uppers that have M4 feed ramps, as well as the brass deflectors. I believe the M4 has had the feed ramps re-configured to make feeding more positive. The stainless pistol length gas system will cycle subsonic rounds as was expected. Nitride. Machined with M4 feed ramps. M4 ramps help in feeding in for carbine in full auto. MT- and CR-series 20 rifles had flattop M16A4/A3 uppers without extended M4 feed ramps, but the MT and CR carbines had M4 feed ramps. M4 Feed Ramps, 7075-T6 Aluminum, CNC: M4 Feed Ramp, 7075-T6 Aluminum, Forged: Sights: Not included, flattop receiver: Flattop receiver, A2 style Front Post: Additional factors. Add in some dedicated 7.6239 magazines and you are good to go. Product Videos. Conclusion: AR-15 Barrels When youre looking to improve the accuracy, reliability and durability of your weapon, any one of these five best AR-15 barrels will get the job done right. M4 feed ramps fall into the "nice but not necassary" category. In general, all you need to understand is that the M4 feed ramps include the barrel extension and upper receiver. It may look more pronouced with the M4 feed ramp barrel in place also though. So is that mean that M4 ramps are part of barrel extention or part of barrel? Although, there are no clear drawbacks to using m4 feed ramps on rifle length gas systems. Includes: 16" Barrel Length Melonite Finish 5.56 Nato Chamber 1 in 7" twist rate Carbine Gas System M4 Feed ramps F-Marked Front sight post A2 Flash Hider Sling Loop Standard Hand Guards w/ heat shields Forged Upper Receiver Polishing increases feed reliability no matter the bullet cartridge combination. The M4 is contoured to accept a grenade launcher, the 16 A2 is not. -Hardcoat Anodized per MIL-A-8625F, Type III, Class 2 Finish. $124.00 MEGA ARMS GATOR FORGED LOWER, WITH M4 FEED RAMPS UPC# 811338034953 11 in stock +-Add to cart. the heavy barrel is good, and the Faxon barrel looks really nice. Voila, the M4 feed ramp was born, and it did indeed solve the feed issues the M4 had during automatic fire. The standard m4 ramps are just a tiny bit narrow and steep for a round nose bullets. Now, I'm looking at some barrels at midwayusa's site, and none of them states if any of them are M4 feed ramp or not. I will see if I can link in a better description and video on the subject. Out of stock Compare. So the feed ramps are only are cut into the barrel extension. Helps dissipate heat for cooler operation, too. These represent good ramps. I had a similar problem with my 7.62x39 AR pistol, and an overpower extractor spring seemed to fix it. Yes, in short the AR-15 is the civi version of the M-16 while the M4 is the Carbine version of the M-16. I have a bit of a dilemma. The M4 is extensively used by the United States Armed Forces, with decisions to largely replace the M16 rifle in United States Army (starting 2010) and United States Marine Corps (USMC) (starting Luth has upped their manufacturing, this newer model has the m4 feed ramps and is milled to spec, the barrel nut lines up perfect to the bolt (they had issues in the past) and all parts fit as expected. It's best to have M4 ramps on both the upper and barrel. So I'll go with it. But just like full auto bolts vs. semi-auto bolts they have no impact on the function or reliability of a semi-auto rifle. and stick with p-mags which position the round high enough, so ramps don't seem to matter, in my experience The 16 HBAR is made of 4150 V chrome molly and is melonite treated. Chad Albrecht, School of the American Rifle: When it comes to AR-15 feed ramp problems, one of the big problems with ARs is that there are actually two different types of feed ramps.

m4 feed ramps vs no feed ramps