Actually, I'm working my way through the design sequence for a survival or hunting rifle, since when I was trying to get something concrete with the Clash, I realized I was lost.
You wouldn't think that a starship was easier to design, but it is.
The Clash represents a sort of frozen design, whether on the lines of it's good enough so why change, except at specific technological turning points as at level nine, or as it turns out, the government bureau doesn't didn't throw enough resources at it to substantially improve it.
The AssLite gets it's momentum from private enterprise, since the militaries have already moved on to gauss, so it's likely customer base is somewhat more demanding.
What surprised me was that material science changes at technological level nine, considering the advanced combat rifle is listed at ten.
Seriously, personal weapon design is a lot more complex than you think (in Traveller).
In terms of assault barrel for rifles, probably should stick to a handgun for effect over that range; the only thing I can think off is using it as a sleeve in a shotgun, to fire intermediate rifle bullets, one reason I'm going down these rabbit holes.
The advanced combat rifle is listed at a thousand starbux, four hundred fifty range, three dice, three kilogrammes, forty capacity, 0.375 per bullet, automatic three, scope
electronic battlefield sight, incorporating both light amplification and passive IR, visual magnification and a laser rangefinder, which may also be used as a target painting device. The weapon is also gyroscopically stabilised during firing. A sling is provided and the muzzle of the rifle includes an integral flash suppressor and adaptor for launching a 40mm RAM shoot-through grenade
Which seems an awful lot to try and cram onto that platform, but that does seem to be the eventual goal for the Clash Nine.
In theory, the Clash Seven would be a default assault rifle, and the Clash Six a Sturmgewehr.
The question is how far are these features organic or accessories; I'm more in favour of keeping the Clashes simple, and using add ons, however, it may prove to be cheaper to have them organic.
It also just occurs to me, that intermediate rifle bullets, let's assume the same calibre, are not interchangeable between advanced and default.
That longer range comes from the increased explosion within the chamber, and I'll assume the assumption is that advanced material science increases the capability of the receiver to increased pressures, though you could use default intermediate cartridges in advanced receivers, since that's what the American Army is planning, essentially training rounds, and combat loads when the balloon goes up, to cut down on the wear and tear of the barrel.
I've always felt the ACR shouldn't be TL10 but rather 8 as it seems like we could build one today. Make it TL9 for flavor. And it should be UCR as in Ultimate CPR Slugthrower.
Regarding the Sturmgewehr, there is one on display here at the WWII Museum. I was surprised as it is larger than I expected, compared to the two or three AK47s I've seen in person. So that seems to gel with your Clash 6/7 ideas.
If the ACR is TL9 at TL10 we should get Gauss Rifles. Why they are TL12 and Laser Rifles are TL9/TL11 is also non-sensical and unsatisfying to me.
I know, neither here nor there with your endeavor. Best of luck play testing the design system lol.
Seriously I mean it, not being snarky. I've gone down the rabbit hole of trying to unify the T5 TL paradigm into a simple 5-step program applicable to MgT and it's definitely whack-a-mole. Don't have the bandwidth to tackle weapon design right now and I don't have the Merc set anyway. But one thing that helped me was defining the Standard - making a baseline item that the before & after can hang off of.
Using my simplified TL progression
Early : Clash Battle Rifle TL5 bulky, reduced ammo capacity, Auto2
Basic : Clash AR TL6 bulky, Auto2 STANDARD : Clash AR TL7 all accessories add-ons, Auto2
Advanced : Clash AR+ TL8 half accs integral, Auto3
Ultimate : Clash ACR TL9 all accs integral, Auto3
So it's IMTU house rules, not canonical but puts a method to the madness. Not sure that helps but a fun thought experiment. Good luck!
Confederal Ammunition is a Solomani corporation specialized in manufacturing ammunition.
As assault rifles are not considered military grade, the standard civilian, and paramilitary, round is .222, compatible with both Clash Seven and Clash Nine receivers. The default damage is three dice using a standard rifle barrel.
If we give the assault rifle a very long barrel, we increase the range from two hundred to two hundred fifty metres, the same as a default rifle.
As for furniture, folding stocks are currently popular, especially while mounted inside vehicles, so that five percent weight gain and fifteen cost increase can be considered a reasonable investment, compared to a full stock at ten percent each.
You can stuff the cleaning kit inside, though not sure if that alters either cost or weight.
Monopod doesn't seem an option, though that could be a modified forward handgrip, with pop out legs for added stability.