I realize this thread is more than a year old, but since I just finished my SU-16, I thought some of y'all might like to see what's possible with them.
This is an Alpha. I've shot thousands of rounds through it before making these changes. Never had a single FTE or FTF in somewhere around 9,000 to 10,000 of rounds over the five or so years I've had it. Made all the changes mostly to prepare for an advanced tactical rifle course that my wife and I just completed. She used the AR and I used the Kel-Tec in anticipation of the KT perhaps being more prone to a failure of some sort, and myself being better-equipped to deal with it if it did. Never happened though. 1300 rounds each without a failure of any kind in either rifle.
Anyway, here she is:
You'll notice two extra rails attached to the Kel-Tec Compact Forend. That is a mod that was actually easier to install than either of the KT mods (forend and pistol grip), and WAY cheaper too (less than $15 total!). They're 5" x 12-slot rails that add tons of flexibility for accessory mounting and positioning. Best $15 bucks I ever spent!
Here's a close-up of the rail mod:
The adjustable buttstock is a Command Arms with the buffer tube included. The design allows for storage of four CR123A batteries on the left side, and the adjustable cheek-weld is mounted via a 6-slot picatinny rail on the right side. The vertical fore-grip holds another two CR123A's, but I won't need more than the four in the buttstock, so that storage compartment is not currently being used for anything.
Mods still to be made:
Chop off that horrendously useless and butt-ugly front sight! I am considering shortening the barrel to 16" when I do that, but haven't decided yet. The 5.65/.223 round benefits greatly from longer barrels in their ballistic profiles, not to mention accuracy. Regardless, when the front sight comes off, a quality flash suppressor/hider will go on.
Replace the cheap, though so far working great, NCStar scope with a high quality scope and Aimpoint (or equivalent) red dot sight mounted on top.
Add rail-mounted sling swivel on left side add-on rail.
I have already added a Beamshot-style barrel-mounted laser and a Spec-Ops "Sling 101" 3-Point sling.
That's it! It was easy and fairly cheap, and the rifle continues to perform flawlessly. All the mods and the rifle cost about the same as a basic, bare-bones AR would cost.
Blues