NationStates Jolt Archive

Imperial Eagle Armaments Corporation
'Finding Better Ways to Kill People for Your Conveniance'

Background

As the Imperial Party begins to invest in military spending as per its manifesto policies, the view was needed that a new rifle was required for the Imperial Army and the Marine Corps to replace the M16A2s in use. IEA Corp, the premier arms manufacturer within the Imperial Republic, was contracted to provide a replacement, dubbed the Rifle Prototype One (RP1).

OOC: Would like a bit of help in designing this rifle, as there are some elements I am unfamiliar with. So far, I have determined the following:

Action: Gas Operated, Short-Stroke Rotating Bolt
Round Size: 6.7x53mm Imperial
Magazine Size: 30 Rounds
Muzzle Velocity: 900 Metres per Second
Maximum Effective Range: 600 Metres
Modes of Fire: Single Shot, Burst (3 Round) Fire
Overall Length: 1 Metre
Barrel Length: 500 Centimetres
Weight (Loaded): 4.5 Kilograms

Comments and constructive criticism welcome.

Have you posted this design in the NS Draftroom. If not, try doing it. There they have excellent advice. Plus 8.3x53mm, that is quite powerful for an operator to handle. That kind of caliber is most better suited to a sniper rifle compare to an assault rifle.

Here's the URL: http://z13.invisionfree.com/The_NS_Draftroom/index.php?act=idx

Why are you replacing a 5.56mm assault rifle with a rifle that fires a round larger than the vast majority of battle rifle rounds?

Have you posted this design in the NS Draftroom. If not, try doing it. There they have excellent advice. Plus 8.3x53mm, that is quite powerful for an operator to handle. That kind of caliber is most better suited to a sniper rifle compare to an assault rifle.

Here's the URL: http://z13.invisionfree.com/The_NS_Draftroom/index.php?act=idx

OOC: I haven't posted it there yet because I do not have permission to post threads at this time, so decided to just put it here. And if the 8.3mm is too powerful for an Assault Rifle, is there a smaller caliber you could suggest? I wanted to use something bigger than a 7.62 NATO, and was going to compensate for recoil issues by only giving the rifle single-shot or three round-burst modes.

Why are you replacing a 5.56mm assault rifle with a rifle that fires a round larger than the vast majority of battle rifle rounds?

I was thinking more of the 7.62mm variant of the weapon rather than the 5.56, and had in mind the desire to punch through some of the more sophisticated armour that is likely availiable on NationStates which leaves the 5.56 or the 7.62 underpowered. I had in mind specifically the use of the 6.3mm round used by Doomingsland Defence Industries. Again, if you have any suggestions I'd be glad to hear them, as is the point of this thread.

OOC: I haven't posted it there yet because I do not have permission to post threads at this time, so decided to just put it here. And if the 8.3mm is too powerful for an Assault Rifle, is there a smaller caliber you could suggest? I wanted to use something bigger than a 7.62 NATO, and was going to compensate for recoil issues by only giving the rifle single-shot or three round-burst modes.

Although I'm not proficient in creating calibers or rifles. The most closest caliber I can think of is the German 7.92mm. But of course this is powerful if you are the 7.92x57mm. The Germans used the 7.92x33mm for their assault rifle, which provided a somewhat good balance. I would pick a more safer caliber between those, because a few NS members use this caliber. Others go between 6mm and 7mm, because of the reduced recoil and increase lethality compared to that of the 5mm. Plus I don't know if anyone uses the 7.95mm.

The round's too big for a standard infantry rifle, especially when transitioning from a smaller caliber like the 5.56mm NATO. I would suggest using something based off the 6.8mm Remington SPC or the 6.5mm Grendel rounds, which offers a compromise between the accurate and long ranged 5.56mm NATO and the hard hitting but sloppy 7.62mm Warsaw Pact round, which is why most rifle rounds on NS tend to be in the six millimeter range.

The round's too big for a standard infantry rifle, especially when transitioning from a smaller caliber like the 5.56mm NATO. I would suggest using something based off the 6.8mm Remington SPC or the 6.5mm Grendel rounds, which offers a compromise between the accurate and long ranged 5.56mm NATO and the hard hitting but sloppy 7.62mm Warsaw Pact round, which is why most rifle rounds on NS tend to be in the six millimeter range.

OOC: Gotcha. I'll likely go with a 6.9mm round.

Updated - if someone could assist in working out an effective range?

A bit over 600m for a point target, but you'll want to consult somebody more experienced in firearm design for an exact number.

OOC:
The theoretical effective of the round range is easy, all you need is the bullet weight, muzzle velocity and ballsitic coefficent then plug them into a handy calc such as this:

http://www.eskimo.com/~jbm/calculations/traj_basic/traj_basic.html

And read off at which range the bullet energy drops below 500joules (msot commonly used number I have seen, but you cound use any value really).

As to the effective rnage of the weapon that is mroe down to the weapon, if it is biult like a common or garden AK with loose tolerances then maybe 300-400m, if using a decent intermediate round (6-7mm) out of a high quality weapon then go for 500-600m.

Now if are really wnating to detail the round then you really should read Tony William's intorduction to ballsitics: http://www.quarry.nildram.co.uk/ballistics.htm

His article on assault rifles also has soem pointers about intemrediate roudns a the end: http://www.quarry.nildram.co.uk/Assault.htm

Have you posted this design in the NS Draftroom. If not, try doing it. There they have excellent advice. Plus 8.3x53mm, that is quite powerful for an operator to handle. That kind of caliber is most better suited to a sniper rifle compare to an assault rifle.

Here's the URL: http://z13.invisionfree.com/The_NS_Draftroom/index.php?act=idx

Wrong link, that is the old but now dead Draftroom. The correct link is in my signature.

Wrong link, that is the old but now dead Draftroom. The correct link is in my signature.

Thanks for the correction. Felt odd that I was the only one there.

If I were you I'd use the 6.7x53 rd. It is in use in several assault rifles including the famous DR83M and E19. It is widely accepted that this round is one of the best assault rifle cartridges.

I was thinking more of the 7.62mm variant of the weapon rather than the 5.56, and had in mind the desire to punch through some of the more sophisticated armour that is likely availiable on NationStates which leaves the 5.56 or the 7.62 underpowered. I had in mind specifically the use of the 6.3mm round used by Doomingsland Defence Industries. Again, if you have any suggestions I'd be glad to hear them, as is the point of this thread.
If you really want you can use my 6.7mm round, I don't mind at all.

If I were you I'd use the 6.7x53 rd. It is in use in several assault rifles including the famous DR83M and E19. It is widely accepted that this round is one of the best assault rifle cartridges.
All that is widely accepted is that there is no best cartridge. Or, more specifically, the best cartridge is the one your alliance uses. [Or, subjectively, the one you like for one or another reason].


B) Changed to 6.9x53mm round due to recommendation.
...Which no one uses. Did you mean 6.7?

Choose your allies and take their cartridge, or take the popular 6.8x51 (IIRC), or outright one of the RL cartridges - 7.62x39, 7.62x51, 5.56x45.


P.S. If you're ever going to do serious design, be sure to come here:
http://z4.invisionfree.com/NSDraftroom/index.php?act=idx
NS II is a larger place, but you'll get more competent advice there, where [almost] all major designers come regularly and development threads don't sink that fast.

I'd like to thank everyone for all the information, advice and links they have given me in this thread. I will be doing some work over the next two hours or so to flesh out a full set of specifications in some regard for the perusal of those in the know.

Regarding the round. I did mean 6.9 rather than 6.7, as I had in mind the idea of having my own round specifically built in my country to make it unique. Being a new nation, I have no particular allies right now, although that will change as I RP for longer. I had in mind the 6.9x53mm being a new round I invented, as it is close to the 6.7mm (thanks for the permission, Doomingsland) but with a little more hitting power. However, going with the 6.7mm seems to be a good idea, as I have no idea how to work out the ballistic coefficient of a bullet I've made up entirely myself. So I will go with that.

Update: Full Specifications put up. Need to come up with a picture (in the works) and then I will repost as a completed weapon.