#mk12 special purpose rifle

[commonwealth-operator]

29 December 2289 / Bullet Heaven

Y'all know I love a good gun wall.

[christiangrest]

Why an SPR (Special Purpose rifle)? 

For the better part of 3-5 decades, the military had a standard 20” M-16 rifle and a shorter carbine length, 14.5” rifle. Both had their advantages and disadvantages. Better velocity and range with the 20” version, but of course it wasn’t as good for close combat roles. The 14.5” carbine version was great for close quarters but lacked somewhat out at distance. You truly need a 20” barrel to get all of the velocity out of the 5.56 cartridge. The SPR or Special Purpose rifle came about as somewhat of an intermediate rifle. The military designated it the MK12. A true MK12 SPR is an 18” barrel rifle, rather heavy, made for suppressor use. It can be used to be more of a precision rifle hen needed than a carbine, but a tad shorter than the 20” M16. 

A number of years ago I set out to put together my own version of an SPR. It wasn’t going to be anything like the MK12, but rather an SPR to suite my own needs and wants. Brownells at the time had most all of the parts I needed for this particular rifle. I opted to use a Ballistic Advantage 18” premium fluted stainless steel barrel. It truly is a work of art and helped to save a little bit of weight along the way. I wanted something that wasn’t overly heavy, but had a rifle length gas system, and this barrel fit the bill nicely. For the gas system a superlative arms adjustable gas block was installed to better fine tune that gas system for suppressor use. To continue with the weight savings theme, I went with an Aero Precision M4E1 receiver set and their Atlas R-One hand guard. The Atlas series of hand guards are super thin and offer a lighter weight than other options. I did sacrifice some rigidity by going with this hand guard, but let’s be honest…I wasn’t going to be knocking down doors with this setup. 

For the butt stock, I had originally went with an adjustable Magpul stock, but later opted to swap it out for a Magpul PRS Lite stock assembly. The Magpul PR lite has just enough adjustability for cheek weld and length of pull, that it works perfectly for my setup. The very last piece of the puzzle was the optic. I decided to go with a Vortex diamondback Tactical FFP 4-16x44. It’s not the best optic, but does a nice job for it’s price point. No complaints of this particular optic. 

This rifle setup is a joy to shoot! It can easily achieve 1 inch groups at 100 yards with quality match ammo. The rifle length gas system is truly what makes this rifle shine…so much smoother to shoot than any of the shorter gas systems. The optic chosen allows it to be very precise with shots. I could’ve chosen a better optic for close in work however. Maybe someday I’ll swap the optic out for something different.

So is this a MK12 SPR? Definitely not….BUT it is my SPR. It does what I had hoped it would do…which is be that intermediate rifle size that is a tad shorter, but still offers good precision if needed. Interested in building YOUR SPR? Definitely check out Brownells as they have all the pieces to that puzzle. 

[breakingnewsalert1]

Popular Rifle Builds for Cloners

Maybe you have heard of a group of individuals in the firearms community known as “cloners.�� Cloners build rifles that resemble actual service rifles. Sometimes these clone rifles very accurately represent the actual platform. Each component is carefully selected to build the most authentic looking rifle. Other times they are simply an informal example of an actual military rifle and are just an inspiration for a unique project. It all depends on the cloner’s end goal.

The three most common clones are the M4, MK12, and MK18. These frequently copied models have not only been used in recent wars but are also seen frequently in the entertainment industry such as movies and TV shows. All are proven platforms with their own iconic look and characteristics. It is not all for show though. The military have designed these platforms to fulfill specific roles.

These frequently copied models have not only been used in recent wars but are also seen frequently in the entertainment industry such as movies and TV shows. (Photo: Ben Brown/Guns.com)

The M4 needs no introduction. This is a standard issue service rifle for many soldiers and the model has gone through a number of reiterations. Branches of the military have elected to choose a variety of their own parts such as stocks, fore-ends, lights, lasers, etc. but for the most part the M4 is traditionally built on a Colt receiver with a 14.5-inch barrel and fixed front sight post. Iron sights, red dot (Aimpoint or EOTech) or ACOG will usually be the sighting system on top. This is a rifle that can fill almost any role and is a good beginner project for a first-time cloner. SEE AT GUNS.COM FROM $1,050

For some cloning is a challenge to build a rifle that is exactly to spec but for others it is a fun way to remember our history and maybe put their own personal twist on it. (Photo: Ben Brown/Guns.com)

Sometimes you want a rile with precision. The MK12 Special Purpose Rifle (SPR) was designed to be more effective at further distances. This rifle chambered in 5.56 is often cloned but does use some unique parts that may require some in depth searching if you want an accurate clone. It has gone through a number of variations but usually you will find these tack drivers with 2.5-10x variable scopes, 18-inch free floated barrels that sit under a 12-inch handguard. A great place to source MK12 components is from Precision Reflex Inc. SEE AT GUNS.COM FROM $2,054

All are proven platforms with their own iconic look and characteristics. It is not all for show though. The military have designed these platforms to fulfill specific roles. (Photo: Ben Brown/Guns.com)

The most popular of the three clones right now is the MK18 chambered in 5.56. Since the MK18 uses a 10.3-inch barrel you will find clones that are in “pistol” form but if you are looking to be as authentic as possible then you will need to build an SBR. A Daniel Defense MK18 is a pretty easy way to knock out a large portion of a MK18 clone. These guns were originally desired for “close quarter battle (CQB)” but have also been found in other roles because of their compact size. These shorties receive a lot of publicity due to a large portion of the Special Operations Community using them. SEE AT GUNS.COM FROM $1,796

For some cloning is a challenge to build a rifle that is exactly to spec but for others it is a fun way to remember our history and maybe put their own personal twist on it. I would recommend if you start a clone build to not get wrapped up in the specifics of every piece. Some of these components can be extremely rare and take years to find. Above all else, have fun with it and build something you will enjoy shooting.

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[seekammo]

TFBTV Guns of SOCOM Ep. 2: The Mk12 Special Purpose Rifle + AEM5 Silencer

Guns of SOCOM, Ep. 2: In this episode, James introduces viewers to the Mk12 Special Purpose Rifle. The Mk12’s primary purpose was to provide a light, precise rifle that could be used in close-to-medium-long range combat. In other words, it needed to be more effective and more accurate than the M4 while being almost as […]

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The post TFBTV Guns of SOCOM Ep. 2: The Mk12 Special Purpose Rifle + AEM5 Silencer appeared first on The Firearm Blog.

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[daltechforce]

TFBTV Guns of SOCOM Ep. 2: The Mk12 Special Purpose Rifle + AEM5 Silencer

Guns of SOCOM, Ep. 2: In this episode, James introduces viewers to the Mk12 Special Purpose Rifle. The Mk12’s primary purpose was to provide a light, precise rifle that could be used in close-to-medium-long range combat. In other words, it needed to be more effective and more accurate than the M4 while being almost as […]

Read More …

The post TFBTV Guns of SOCOM Ep. 2: The Mk12 Special Purpose Rifle + AEM5 Silencer appeared first on The Firearm Blog.

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[arnoldschwanke]

TFBTV Guns of SOCOM Ep. 2: The Mk12 Special Purpose Rifle + AEM5 Silencer

Guns of SOCOM, Ep. 2: In this episode, James introduces viewers to the Mk12 Special Purpose Rifle. The Mk12’s primary purpose was to provide a light, precise rifle that could be used in close-to-medium-long range combat. In other words, it needed to be more effective and more accurate than the M4 while being almost as […]

Read More …

The post TFBTV Guns of SOCOM Ep. 2: The Mk12 Special Purpose Rifle + AEM5 Silencer appeared first on The Firearm Blog.

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[smaggminis]

The Biggest and the Smallest and How They’re the Same

I have in my possession both the heaviest and the lightest of all the humanoid TAGs (since Maghariba Guard is her own category) and they are surprisingly pretty similar in design. The main difference is scale.

Let me elaborate.

Size and armour:

The biggest factor differentiating the two. Gecko is the smallest, lightest and cheapest TAG in the game (technically Scarface is cheaper, but comes with a Cordelia tax), with only ARM5, silhouette 6 and costing 53-54pts by loadout. Jotum is the polar opposite, costing a whopping 103pts, with ARM10 and silhouette 7. Neither of them have any kind of movement abilities (aside from terrain ones, Zero-G for Gecko, Mountain for Jotum), so they’re both grounded, heavy bullies. Jotum is the toughest of all the PanO TAGs and Gecko cannot compete with that, however, despite being a TAG, Gecko is often classified as super-heavy infantry. Points-wise its competitors are not Iguana, Lizard or Szalamandra, but SWAST Taskmaster and Kriza Borac. Since both of them are actually HI rather than TAGs, Gecko is the toughest in its class, thanks to the extra point of Structure to their two Wounds.

Weapons:

Gecko has two different loadouts, but both of them follow the same principle Jotum is armed by as well. It’s a high Burst primary weapon, a Direct Template secondary weapon and a disposable Anti-tank tertiary weapon, with no CC skills or armaments.

Again it all comes down to scale: Gecko is armed either with (pretty laughable) double Combi Rifle or (more respectable) Mk12 as its primary. They are both medium-range high burst weapons, with Mk12 also having decent damage. Jotum’s main weapon is a MULTI HMG, a gun only outclassed by Autocannon and HMC. It has high damage, a long range and AP/Shock rounds to choose from, and can also fire an Explosive round if needed be. But the main principle is the same: high Burst weapon to use in the Active Round.

The secondaries are the same for both Geckos: Chain Colt. It gives him a Direct Template option to use against Camo markers or multiple enemies without rolling. Jotum has the same, except it’s a Heavy Flamethrower. While Fire ammo is much better than Chain Colt’s Normal, in most cases the difference comes down to Large Teardrop vs Small Teardrop.

With tertiary it gets interesting, as Geckos actually outclass the Jotum here: Panzerfaust and Blitzen are both longer ranged than Jotum’s D.E.P. and have two rounds to his one. They have a similar use though: to be used when caught by something heavy outside favorable range. Because main Gecko weapons are so short ranged, Panzerfaust/Blitzen give them something to use against, say, an enemy Jotum firing from an HMG. Similarly if a Gecko would get close enough to a Jotum for the HMG to become unwieldy, the D.E.P. will make short work of it, as the effective range is the same as Gecko’s Combis and similar to Mk12 (which actually can put a dent in it). Jotum does have the extra EXP shot on the HMG though.

Battlefield role:

As surprising as this may sound, both Gecko and Jotum serve the same role on the battlefield: they’re “frontline” TAGs. Their main purpose is to eat Orders, get in position and hail bullets on the enemy. Now Jotum can reach more units effectively thanks to greater range and special ammo, but in Infinity most targets are squishy Infantry anyway, and Infantry dies to MULTI HMG rounds just as well as they do to double Combi ones.

But the scale difference persist: a Jotum easily takes more than a third of a list, both in points and SWC. It’s tough, because if it dies, your army loses most of its teeth. A Gecko takes only 50+ points and either no or only 0.5SWC, thus being more disposable and letting other units take heavy weapons. The fact that the pilot has two Assault Pistols kind of point to the fact that the Gecko will probably not survive, but the Pilot is designed to still fight to the death himself, while Jotum is equipped with the crappy Crabbot.

(arguably the pilot is deadlier outside the Gecko with a double Combi profile)

However the principle is the same, only the scale is different. A Gecko or a Jotum is supposed to go forward and kill as much as possible before it dies. And maybe take an objective, but that’s an option, not main goal.

“But Smagg”, you say, “Fireteam: Duo was designed with Geckos in mind! You’re supposed to use them in pairs, even in vanilla!”

To which I reply:

I rest my case.

[ghost-recon-wildlands]

I see alot of people on reddit and the forums talking about how the ballistics and weapon stats in this game are not realistic (which is true), but often not really displaying an understanding of why. I figured I could clear some things up for people to better understand the basics (without getting too snipery).A combination of bullet weight (grains), barrel twist, barrel length, and caliber (case powder), is what determines the muzzle velocity of a round upon leaving a barrel.Lets keep in mind that ghosts are US military and even though theyre delta/cag/seal/dentist/weathermen, theyre still subject to nato and UN warfare rules, meaning ghosts will generally be using ball ammo, no hollow points, and likely limited steel penetrators. (Anything other than ball ammo apparently kills people too hard...)So heres some basics.heavier bullets require faster barrel twists to stabilize in flight.lighter bullets require slower twist rates to not cause destabilization due to over spin.longer barrels = increased muzzle velocity (often negligable) and accuracy.increased muzzle velocity = better armor penetration.lighter bullets start very fast, but slow down very quickly.heavier bullets start a bit slower, but hold their speed better.slower bullets cause more cavitation on impact as they deform and fragment properly.faster bullets can often over penetrate a soft target and can often barely deform or fragment at all.So for example the 5.56 nato round M855 ball commonly known as "green tip", is best fired from 14.5-18 inch barrels with a 1/7 twist. This gives the round an effective range of about 500-600 meters and about 2750 fps. Not quite fast enough to penetrate modern body armor, but heavy enough to keep up speed and cause significant wound cavitation between 150 and 400 meters. When you hear about "through and through" wounds related to the M855 round, its usually because we shot guys inside of 100 meters and the bullet velocity hadnt slowed down enough yet.XM193, the common vietnam era 5.56/.223 round is only 55 grains but out of a 20 inch 1/12 twist rate barrel from the m16A1, the muzzle velocity was over 3300 fps. Since most engagements were inside of 100 meters, US service members were often witnessing over penetration of their targets. (Fun fact: XM193 from a 1/9 twist will shoot straight through modern steel armor out to 100 meters)So now that we have a better understanding of ammunition and muzzle velocity, its time to talk about weapon handling.longer or heavier "bull barrels" reduce muzzle rise, thus less recoil.shorter barrels are lighter, so more recoil and muzzle rise will be felt.higher calibers have more recoil, but it is often negligable (.50bmg, .338 lapua and generally any winmag/magnum load not withstanding) because heavier bullets travel slower, thus newtons third law.larger calibers often require heavier platforms thus reducing felt recoil and muzzle rise in a more or less proportionate manner.So for example, the Mk17 and M4A1 (both platforms I have alot of time on) have very similar muzzle rise and percieved recoil. The mk17 fires a slower heavier round, and is heavier itself with a heavier forend and balanced reciever. The M4A1 is light, fires a lighter faster round and has very little weight in the forend. This makes them handle about the same, but the mk 17 fires a much heavier, much more devastating round.Generally in wildlands, people are saying all the weapons firing 5.56 nato should be doing the same damage and penetration. This isnt necessarily true, as we dont know the bullet weight and twist being used with each 5.56 nato chambered weapon. There could very well be a noticable difference to its stats, but in reality, it would be negligable compared to what we see in the game. (Maybe the p416 is so weak because its firing 40 grain .223 varmint ammo) As i said earlier though, the ghosts would likely be using the abundant M855 ball ammo which would stabalize decently and similarly across all platforms. As for the pistol ammo from smgs in the game, they are scaled much more appropriately with their real life counterparts, but still a bit wonky.Now in the services, we all go to great lengths to adapt our assigned platforms to the environment we have to fight in. This generally comes in the form of attachments.modern suppressors barely affect the physics of a round leaving the barrel. They also do not make you a secret ninja assassin. Most suppressed rifles still are about as loud as a nail gun unless youre shooting subsonic ammo, which is a very slow traveling bullet with very limited range.compensators primarily manage vertical recoil. (Too much compensation on a heavy barrel like on a Mk12 SPR can cause negative muzzle rise, thus you will normally see them with a standard muzzle crown or a flash hider). They do not affect range or muzzle velocity or pen and damage like they do in the game.flash hiders reduce and on some platforms completely eliminate muzzle flash increasng youre Real life ninja stat by .333repeating.vertical grips are the gold standard used in special operations and the infantry because it keeps your hand off the barrel shroud. (Guns get hot and in a tic we often dump 2-3 mags) even afg's get hot as shit. The kind of grip you use on your weapon or no grip at all will generally not affect the handling of a weapon in anyway. Its just shooters preference, and every shooter is slightly different. In actual fights, vertical grips serve that extra purpose of no burninating ourselves.lasers and shit.... depends on the mission. If im wearing an/psq 20's, theyll pick up both IR and Vis. Maybe the locals were working with only have vis. If im wearing my pvs 14's, theyll only pick up IR. The mission generally dictates what sort of equipment we use for night operations. The standard is the peq15, its an excellent tool that has both vis and IR plus an IR illuminator, plus it can take a beating and still work. In no way shape or form should these affect the stats of a weapon. They do make lobbing rounds at night a lil easier.And lastly... ghillie suits.... Iv never seen anyone wear that shit in any theatre ever, not even once, just scouts trying to look cool during training and such. Cut that shit out wierdos, you look like sasquatch. via /r/GhostRecon