Paxal
.223 Rem
So, Im thinking of, maybe, putting together an AR pistol out of spare parts I have,but will need a barrel. My question is, what is the minimum length needed to allow for complete complete burn? This is assuming 5.56/.223 ammo.
AR Pistol Build Question
- Thread starter Paxal
- Start date
Bananabandit
.338 Win Mag
gun_slinger_boy
.338 Win Mag
20 inches if for complete burn. But consensus is that 14 is the minimum for reasonable performance. If you ask me 10 is just fine for 100 yards and under. As always it depends on what you're looking to do.
Paxal
.223 Rem
Just looking to have fun. But I still want reliable.
spat
.700 Nitro Express
I have one in .223 with a 7" barrel.
The ballistics are a joke, but it is reliable and a lot of fun to shoot.
gun_slinger_boy
.338 Win Mag
meketrefe
.450/400 Nitro Ex
Complete burn changes with loads but for light sevice ammo the most bang x round can be produced in 21 inches with a gas gun. Take out 100-150fps for the gas gun vs bolt.
For match ammo with a bolt action one can go up to 24-25 inches before stsrting loosing speed although certain ammo or reloads can produce very high speeds with heavy bullets and slow powders up to 26".
The 223 is a very efficient ad accurate round given proper barrel lenght, rifling, etc....
It is not a pistol round obviously. Of the popular small calibers the 6.8 is the best round for a 10" pistol or the whisper for subsonic (marginal use). But also have some other great cat options courtesy of the thomson pistol style like the 6.5 and 7mm TCU using the same 223 parent casing.
Those are way more efficient than the tipical ar rounds due to the case volume to bore ratio.
Other than that, the thumpers are better but the best an actual pistol caliber.
The 9mm, 40 and 45 are the usual suspects for short barrels but for more power yet a great balance between straigh pistol and rifle you have the 357 SIG and the mighty 9x25 dillon that give you 357 magnum power and beyond in a convenient autoloader and also have a moder pistol to go with it.
You also have the tokarev but the 35 bore is so much better for this.
5.56 in a barrel 16" long is already a bit of a waste and anything less thsn 15-14" is absurd.
But if you like expensive fireworks then might be ok.
For match ammo with a bolt action one can go up to 24-25 inches before stsrting loosing speed although certain ammo or reloads can produce very high speeds with heavy bullets and slow powders up to 26".
The 223 is a very efficient ad accurate round given proper barrel lenght, rifling, etc....
It is not a pistol round obviously. Of the popular small calibers the 6.8 is the best round for a 10" pistol or the whisper for subsonic (marginal use). But also have some other great cat options courtesy of the thomson pistol style like the 6.5 and 7mm TCU using the same 223 parent casing.
Those are way more efficient than the tipical ar rounds due to the case volume to bore ratio.
Other than that, the thumpers are better but the best an actual pistol caliber.
The 9mm, 40 and 45 are the usual suspects for short barrels but for more power yet a great balance between straigh pistol and rifle you have the 357 SIG and the mighty 9x25 dillon that give you 357 magnum power and beyond in a convenient autoloader and also have a moder pistol to go with it.
You also have the tokarev but the 35 bore is so much better for this.
5.56 in a barrel 16" long is already a bit of a waste and anything less thsn 15-14" is absurd.
But if you like expensive fireworks then might be ok.
Paxal
.223 Rem
Interesting stuff.
What about 300 BLK? I’m not wed to anything. Like I said, I‘m really just using up spare parts, so, it’s just for fun.
any ar in any caliber and or barrel length can be built to be reliable using the correct parts, powder burn rate can be easily compensated for. the 5.56/223 might not the greatest numbers out of a 10 inch barrel, doesn't mean it can be reliable. there are many many vids on youtube that show this. shooting pistol cartridges that are designed to be fired out of a 4-5" barrel out of a 16" barrel is dumb too but manufactures still make firearms every day that do just that.
Paxal
.223 Rem
Since I’m considering this, and will have to buy parts to make it work at all, why even stay with 223? What would be a good non-pistol caliber to try in an AR pistol? 300? 6.8? ??? What have you tried that worked out well?