It's kinda backward - building the gun, then figuring out what it's good for?
I spec'd exactly what I wanted it to do, then chose every part to support it.
First, caliber, then barrel length, which decides the gas - not whim or fancy. Gas is actually all the same, 5-7 inches from the muzzle. 14.5" carbines use carbine gas, 16" uses midlength, 20" uses rifle. That's the optimum length for each - about 5-7" off the muzzle, and messing with it narrows the range of ammo you can use, forcing it to be more full power and premium loads.
From there, the upper that supports what sights you need, stock, grip and fore end, and trigger dead last. Spending $250 on a trigger won't make a 2MOA barrel do anything more than 2MOA. All the addon's don't make it any more accurate than the barrel - they just take away less accuracy from what they compromise.
I see a lot of putting the cart before the horse, and it expands the likelihood of a negative result, a gun with dynamic conflicts that will need other parts to fix it.
SBR? No tactical field advantage in ballistics at all, a further expense of $200 or adding the length right back for no gain, just loss. If it was designed to be a CQB infrastructure gun - maybe the loss of length could be an incrementally better thing, it would take years of practice to prove it, and the practice is more important, anyway.
Gas choice - stick to the standard 5-7" from the muzzle and don't mess with it unless you know what other compensations you are willing to do, like opening the gas port and limiting ammo selection.
Be very careful about adopting M4 parts, like the stock and quad rail, they are institutional compromises to fit a heavily equipped soldier, and allow the use of a wide variety of sights and add-ons for a large number of different units. A standard fixed stock and the longest handguard you can fit are just as reliable, if a rail piece is needed, a short strip can be bolted on . Spending $250 for a quad rail and then adding ladder covers makes them heavier than a stock handguard - it becomes an expensive detraction with a front heavy balance. Adding more weight in the rear isn't necessarily a plus.
Build a gun to a purpose, it sorts out, build a gun and then figure out what it could be good for is really an expensive hobby.
I spec'd exactly what I wanted it to do, then chose every part to support it.
First, caliber, then barrel length, which decides the gas - not whim or fancy. Gas is actually all the same, 5-7 inches from the muzzle. 14.5" carbines use carbine gas, 16" uses midlength, 20" uses rifle. That's the optimum length for each - about 5-7" off the muzzle, and messing with it narrows the range of ammo you can use, forcing it to be more full power and premium loads.
From there, the upper that supports what sights you need, stock, grip and fore end, and trigger dead last. Spending $250 on a trigger won't make a 2MOA barrel do anything more than 2MOA. All the addon's don't make it any more accurate than the barrel - they just take away less accuracy from what they compromise.
I see a lot of putting the cart before the horse, and it expands the likelihood of a negative result, a gun with dynamic conflicts that will need other parts to fix it.
SBR? No tactical field advantage in ballistics at all, a further expense of $200 or adding the length right back for no gain, just loss. If it was designed to be a CQB infrastructure gun - maybe the loss of length could be an incrementally better thing, it would take years of practice to prove it, and the practice is more important, anyway.
Gas choice - stick to the standard 5-7" from the muzzle and don't mess with it unless you know what other compensations you are willing to do, like opening the gas port and limiting ammo selection.
Be very careful about adopting M4 parts, like the stock and quad rail, they are institutional compromises to fit a heavily equipped soldier, and allow the use of a wide variety of sights and add-ons for a large number of different units. A standard fixed stock and the longest handguard you can fit are just as reliable, if a rail piece is needed, a short strip can be bolted on . Spending $250 for a quad rail and then adding ladder covers makes them heavier than a stock handguard - it becomes an expensive detraction with a front heavy balance. Adding more weight in the rear isn't necessarily a plus.
Build a gun to a purpose, it sorts out, build a gun and then figure out what it could be good for is really an expensive hobby.