Yes, it will, but then it would be in an SBR (short-barreled rifle) configuration, and would be a violation of federal law if the lower receiver is unregistered.
There are carbine conversion kits which use the lower receiver of the Glock pistol, and mate it to a carbine upper, yes.
No. The HK417 is chambered for the much larger 7.62x51 cartridges, and the upper receiver will be too long to be fitted to a 5.56x45 HK416 lower.
An upper receiver is the top part of a firearm that houses the barrel, bolt carrier group, and other key components. It is typically attached to the lower receiver to complete the firearm.
yes, no problem
The M16 comes in two main parts, the upper and lower receiver. The upper receiver consists of the receiver, carry handle (on older models), bolt group, charging handle, barrel, hand guards, front sight, gas tube, and many other small parts. The lower is composed of the stock (inside it is the buffer spring), pistol grip, fire selector, magazine well. Go to bushmasters website or youtube to see a cutaway M16 in operation for an understanding of how it works.
100 degree c
Look at the lower forward receiver,the lower tang,or upper tang.
Upper Receiver: Bolt Carrier Group: Gas System Lower receiver: Trigger Group
Go to google.com. From the UPPER toolbar, select IMAGES, then enter High Standard Sport King.
18 inches
By US law, firearms must have serial numbers. The part legally considered the firearm is the receiver for a long arm and the frame for a pistol, and that is where the number would be. There are a few special cases, like the FN-FAL and AR-15 designs, which use upper and lower receivers. For the FAL, the firearm is the upper, for the AR, it is the lower. Guns made prior to 1968 may not be numbered at all, particularly if they were made by a small company.
http://www.glockfaq.com/gunsmithing.htm#slideframe The 23 receiver is not compatible with the 38 slide.