Wolfs Shipyard Forum

The new forum for Wolf's Shipyard
It is currently Sun Aug 19, 2018 6:43 pm

All times are UTC - 5 hours [ DST ]




Post new topic Reply to topic  [ 17 posts ]  Go to page 1, 2  Next
Author Message
PostPosted: Tue May 27, 2014 12:23 am 
Offline

Joined: Mon Aug 05, 2013 12:10 am
Posts: 85
Sniper Rifle used by Colonial Marines from 10 years Before Fall. It is the most modern rifle issued for Marine Snipers. It is for a story I'm working on that follows a young marine from 4 years before the Cylons return and in the aftermath.
http://s1300.photobucket.com/user/fiery ... sort=3&o=0

MRM-105A7 or Marine Rifle Model 105 Alpha 7

Shoulder Fired, Bullpup stock, Air Cooled, Recoil Operated, Magazine Fed, Sniper Rifle with a Rotating Three Lug Bolt, Selectable Rate of fire of Simi-auto and full auto with a cyclic rate of fire of 600 rounds a minute and a sustained rate of fire of 90 rounds per minute. It has Eight lands and groove reciever with a 1 meter barrel with a 1 in 700mm left hand twist, muzzle brake and flash suppresor. Chambered for a 12.95mm by 138mm caseless round. The 20 round box magazine weighs 1.2 kg when loaded. The weapon measures 1,253 mm from tip to tip and is 310 mm from top to bottom with a bipod that extends up to 200 mm. Empty the rifle weighs 8kg 523 grams.

As with any of my drawings permission to use as long as credits are given and any comments are welcome


Last edited by feral on Tue May 27, 2014 1:55 pm, edited 2 times in total.

Top
 Profile  
 
PostPosted: Tue May 27, 2014 12:20 pm 
Offline
Site Admin
User avatar

Joined: Sat Jul 02, 2011 1:00 am
Posts: 4700
Location: Battlestar Hecate BSG-94
Since you asked for comments...

feral wrote:
Shoulder Fired, Bullpup stock, Air Cooled, Recoil Operated, Magazine Fed, Sniper Rifle with a Rotating Three Lug Bolt, Selectable Rate of fire of Simi-auto and full auto with a cyclic rate of fire of 600 rounds a minute and a sustained rate of fire of 90 rounds per minute.


If it's capable of full automatic fire it is highly doubtful that it will have the accuracy - or be able to maintain the accuracy - needed for a precision rifle. Full auto brings with it a host of issues in standard small arms calibers which are exacerbated in something as large as a light autocanon round.

feral wrote:
It has Eight lands and groove reciever with a 1 meter barrel with a 1 in 10 cm left hand twist, muzzle break and flash suppresor.


The barrel length sounds good, but the twist rate is insanity. 1:10 cm is one twist in four inches which will cause extreme fouling, probably deform or strip the jacket of the projectile, and worse, cause an extremely high chamber pressure. I don't think that there's any round that has a twist rate that tight; the closest are a .177 caliber and a 4.6mm (taken from Lilja's chart). When you write the story, make sure to spell it brake, as in something that slows or retards an object from moving, and not break which is when something is physically damaged. ;-)

feral wrote:
Chambered for a 12.95mm by 138mm caseless round. The 20 round box magazine weighs 1.2 kg when loaded. The weapon measures 1,253 mm from tip to tip and is 310 mm from top to bottom with a bipod that extends up to 200 mm. Empty the rifle weighs 8kg 523 grams.


The drawing, while good, will require someone with the stature of an ape; they'd need to reach down to his knees to be able to shoulder the rifle. Length of pull (from the face of the trigger to the end of the stock) should be ~13.5", though it can vary by an inch or two in either direction. This rifle has close to 20" or so of pull and the end of the stock should be almost flush with the rear of the magazine, but that opens up other issues such as where will the bolt carrier go when it recoils...

Barrett tried to make a .50 bullpup and while they got it to work, it wasn't very comfortable or ergonomic.


_________________
Kurt

Click the link to read Lady Hecate off line in PDF, .epub, or Kindle formats: http://www.bsg94.org/downloads/index.html
Click here for the Colonial Warbook for Lady H: http://www.photobucket.com/colonial_warbook


Top
 Profile  
 
PostPosted: Tue May 27, 2014 1:41 pm 
Offline

Joined: Mon Aug 05, 2013 12:10 am
Posts: 85
wow missed that twist rate, just edited. Thanks. The full auto feature gives suppression capabilities for when SHTF. Sniping will be used in the semi auto mode. The apes that will fire it well I hope the story explains better as this is going to be a Halo type situation where the marines use genetic experiments to make "super soldiers". It will be a near to post fall story dealing with the aftermath and rebuilding. This will be my first attempt at writing so any and all input is welcome. Thank you for the input Kurt, its always best to have two sets of eyes on a project. Again Thank you


Top
 Profile  
 
PostPosted: Tue May 27, 2014 1:51 pm 
Offline
Site Admin
User avatar

Joined: Sat Jul 02, 2011 1:00 am
Posts: 4700
Location: Battlestar Hecate BSG-94
Glad I could help. I'm not sure how much utility a full auto weapon with only 20 rounds is going to be. The sniper community is moving to self loading weapons for fast followup shots and the ability to provide fast aimed fire. Then there's the recoil...have you ever fired a .50?

_________________
Kurt

Click the link to read Lady Hecate off line in PDF, .epub, or Kindle formats: http://www.bsg94.org/downloads/index.html
Click here for the Colonial Warbook for Lady H: http://www.photobucket.com/colonial_warbook


Top
 Profile  
 
PostPosted: Tue May 27, 2014 2:21 pm 
Offline
User avatar

Joined: Sun Jul 27, 2008 1:00 am
Posts: 441
I've played Borderlands and its sequel. This is a science fantasy video game series with randomly generated loot. There are fully-automatic sniper rifles in both games. You want *very* short controlled bursts even with the cartoon arcade physics, character buffs, and a rifle with the big mag and low recoil parts.

EDIT: a 13mm rifle with a 100mm twist? Holy s[HONK!] Better to go with a smooth bore and APFSDS rounds if you want to fire super duper long skinny projectiles better for armor-piercing.


Top
 Profile  
 
PostPosted: Tue May 27, 2014 6:06 pm 
Offline

Joined: Mon Aug 05, 2013 12:10 am
Posts: 85
The DARPA of the Colonial Marines has taken a list of improvements from its field snipers and has fielded the MRM-107A6. The barrel has been shortened by 25cm. Ergonomic grips for improved control and comfort.

http://s1300.photobucket.com/user/fiery ... sort=3&o=0

Thank you all for the input please continue to comment and permission to use my drawings as long as proper credit is given.


Top
 Profile  
 
PostPosted: Wed May 28, 2014 6:04 pm 
Offline

Joined: Mon Aug 05, 2013 12:10 am
Posts: 85
This is the standard rifle for Marine Infantry called MRM-25. It is a 10mm and has several attachments including a standard hand grip, tactical grip, bi-pod, 30mm semi-auto grenade launcher, day/night/thermal scope and an extended barrel for better accuracy. There are 20 and 30 round magazines for the 10mm and a 4 round magazine for the grenade launcher. Other attachments not shown are standard battle sights, flashlights, laser sights, red dot scopes, and HUD interface scopes. It is designed for an effective range of 100 to 300 meters for the standard barrel and up to 500 meters for the extended barrel. The grenade round arms after 20 meters and is effective up to 300 meters. The grenade has a bursting radius of 5 meters with a 10% probability of incapacitation.
http://s1300.photobucket.com/user/fiery ... sort=3&o=0
Comments please, and permission to use my drawings is given as long as proper credit is given


Top
 Profile  
 
PostPosted: Wed May 28, 2014 6:23 pm 
Offline
Site Admin
User avatar

Joined: Sat Jul 02, 2011 1:00 am
Posts: 4700
Location: Battlestar Hecate BSG-94
Just a few quick notes before I head out for the evening...

On the 12.9mm rifle... the length of pull is still way, way too long. That's the distance from the buttstock to the face of the trigger and should be about 13.5" or so, adjustable up or down by about an inch or inch and a half. I don't think anyone alive today short of perhaps someone well over seven feet tall would have any hope of getting a cheek weld on the thing. That's just how the body is designed.

On the standard rifle...why 10mm? The trend, even in caseless designs, is to a smaller, faster, flatter shooting projectile with armor piercing or semi-armor piercing qualities. A 10mm rifle firing a 250-300gr bullet (you are going to need a long bullet for aerodynamics and that means mass) is going to generate a crapload of recoil that the average troop is going to be able to fire perhaps a dozen rounds or so before they can't shoot anymore, and forget about full auto.

A 5mm to 6.5mm caseless round that pushes the projectile to between 3300 feet per second (5mm) to about 2900 feet per second (6.5mm) would be about the sweet spot, with a 100-200fps variation.

Again, this is based on real world ballistics and physics as shown in the show. See the US Army's ACR trials that were conducted in the late 1980s ( http://en.wikipedia.org/wiki/Advanced_Combat_Rifle ) for a good idea of the ideas and how they'd be employed. Small arms technology hasn't changed much since then other than the theory on how to employ the rifles and the hardware that is hung off them.

_________________
Kurt

Click the link to read Lady Hecate off line in PDF, .epub, or Kindle formats: http://www.bsg94.org/downloads/index.html
Click here for the Colonial Warbook for Lady H: http://www.photobucket.com/colonial_warbook


Top
 Profile  
 
PostPosted: Wed May 28, 2014 10:51 pm 
Offline

Joined: Mon Aug 05, 2013 12:10 am
Posts: 85
A very rough premise of the first book, is that five years after the first Cylon war a group of scientists, military and government secret operative begin a crash eugenics program. Not splicing genes from one critter to another but genetic screening of uh... "base material" to remove most negative sequences and optimize preferred traits. Once the child is born, extreme hormonal and steroid experimentation will further enhance the individual. From 5 years old they enter a fully comprehensive military style life that trains them in all aspects of combat. Casualties are expected to run as high as 75%. Every year they improve on the "grand design" and a new generation stronger, faster, smarter and generally better of soldiers. By the time the Cylons return 53 years later there will be thousands of super-soldiers, vehicles, equipment all superior to the best the colonies can field. Along with the eugenics, this shadow organization also employs the best scientists money or threats can by. They create new weapons and vehicles for their new soldiers.
I am planning three books around the fall of the colonies and two or more after all provided I don't suck that is.


Top
 Profile  
 
PostPosted: Thu May 29, 2014 10:23 am 
Offline
Site Admin
User avatar

Joined: Sat Jul 02, 2011 1:00 am
Posts: 4700
Location: Battlestar Hecate BSG-94
The premise sounds like you really want to write Halo. ;-)

Joking aside, unless Colonial bioscience is much, much, much more advanced than we've been shown, the most you'll get are a range of larger Olympic quality specimens that have little to no empathy or social skills. And you'll have weapons that will still shatter their shoulders when fired or at least cause lasting nerve or other physical damage (detached retinas, etc.).

_________________
Kurt

Click the link to read Lady Hecate off line in PDF, .epub, or Kindle formats: http://www.bsg94.org/downloads/index.html
Click here for the Colonial Warbook for Lady H: http://www.photobucket.com/colonial_warbook


Top
 Profile  
 
PostPosted: Thu May 29, 2014 1:26 pm 
Offline

Joined: Mon Aug 05, 2013 12:10 am
Posts: 85
I sketched out the storyline a week ago when I saw a special on discovery I think or CNN either way the show was about stopping aging. The reporter or host was at a university where his "genetic sample" was purified by screening first for any uh... "samples" that were disfigured structurally (no tail, not a strong swimmer, ect). The next step using a powerful microscope they scanned for DNA structural defects. The next step was screening for known genetic precursors for different diseases (autism, certain cancers, ect.). The final step was sorting the "sample" into male "Y" chromosome and female "X" chromosome. That was going to be my baseline colonial level of eugenics, current with our own technology. Most of the "subjects" of this program are going to be 6 foot to 6.5 feet tall and between 250 and 300 pounds so high end Olympic quality and definitely anti-social, that's part of the story.

as for the MRM-25 it is now a 7mm which will make it more effective in environments like jungles and forests but give it the range needed for urban and open areas. Powder "load" similar to a 7.62 X 54. I am redrawing the sniper rifle so the grips match up better. Had a brain storm last night about a twin buffer spring running above and below the bolt will halve the length of the recoil assembly. Its still going to kick like a mule and shoulder fire full auto is going to hurt.


Top
 Profile  
 
PostPosted: Thu May 29, 2014 5:26 pm 
Offline

Joined: Mon Aug 05, 2013 12:10 am
Posts: 85
I need to start a new thread and merge it to this lol

MRM-108 Series
http://s1300.photobucket.com/user/fiery ... sort=3&o=0
Comments please and permission is given to use my drawings as long as proper credit is given


Top
 Profile  
 
PostPosted: Thu May 29, 2014 6:44 pm 
Offline
Site Admin
User avatar

Joined: Sat Jul 02, 2011 1:00 am
Posts: 4700
Location: Battlestar Hecate BSG-94
Where does the hand grip the pistol grip? There really isn't any room to get a decent grip on the gun; that goes for both versions. Go over here and play around a bit to get an idea of the necessary ergonomics and sizes: http://pimpmygun.doctornoob.com/app.php

_________________
Kurt

Click the link to read Lady Hecate off line in PDF, .epub, or Kindle formats: http://www.bsg94.org/downloads/index.html
Click here for the Colonial Warbook for Lady H: http://www.photobucket.com/colonial_warbook


Top
 Profile  
 
PostPosted: Thu May 29, 2014 6:51 pm 
Offline

Joined: Mon Aug 05, 2013 12:10 am
Posts: 85
sweet Kurt, thank you very much.


Top
 Profile  
 
PostPosted: Fri May 30, 2014 12:20 pm 
Offline

Joined: Mon Aug 05, 2013 12:10 am
Posts: 85
MRM-110-MUR

Multi-use Rifle is a Shoulder Fired, Bullpup stock, Air Cooled, Recoil Operated, Magazine Fed, Sniper Rifle with a Rotating Three Lug Bolt, Selectable Rate of fire of Simi-auto and full auto with a cyclic rate of fire of 600 rounds a minute and a sustained rate of fire of 90 rounds per minute. It has Eight lands and groove receiver with a 60cm barrel with a 1 in 100 cm left hand twist, Muzzle brake and flash suppresser. Chambered for a 11mm by 105mm caseless round. The stock is telescoping and can be moved up or down for comfort. There is a gas piston and padding to relieve some recoil. The twin piston and recoil spring assembly further reduces recoil, as does the muzzle brake. The felt recoil is slightly more aggressive than the 7.62mm used today.

The weapon has several adjustable points allowing a wide range of customization. The stock for example can telescope up to 10cm and 5cm up or down. The gel filled cheek rest can move up or down 5cm. The scopes eyepiece can also move in all 3 dimensions for use left or right hand. Forward pistol grip can be moved along the rail along with the bi-pod.

The MRM-110 has true ambidexterity with selector switch, and magazine release on both sides of the receiver, selectable left or right ejection of unused rounds, or left and right belt feed.

The rifle also has a 5 round civilian model, and security and law enforcement up to 20 rounds, and military has either 50 round drum or 200 round belt.

The projectile is a 11mm by 105mm Tylium enhanced both in the powder case and the bullet. Small scoring along the boat tail gives minor inflight fin stabilization.

http://s1300.photobucket.com/user/fiery ... sort=3&o=0


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 17 posts ]  Go to page 1, 2  Next

All times are UTC - 5 hours [ DST ]


Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Group