Forms In. FINALLY!!! Sig MPX SBR

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Woolecox

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Feb 14, 2009
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I got a call from the gun shop today and the news was good. Form-4 came back from the BATFE for my Ti-Rant suppressor. Also got a Sig collapsible stock a while back and an approved Form-1 to make it a short barreled rifle.

My MPX is now in the form that I envisioned from the beginning. I shot 80 rounds through it today at a 100 yard indoor range. The purpose of all this (other than fun!) was to get the 147 grain XTP's zeroed at 50 yards.

That puts me 3/4" high at 25 yards, on at 50, and 2.5" low at 100 yards. Ten yard shots hit about 2.0" below point of aim. All 80 rounds shot with the suppressor on. It is super quiet. No gas or spray to the face at all. I have still yet to have any kind of a malfunction with this weapon.

Even though I was shooting with an unmagnified ret dot optic, accuracy was outstanding. Three and five shot groups shot at 50 yards were ranging from 1.0 to 1.5 inches. Twenty five yard groups were around 0.5", and 10 yard groups were in the same hole. I had the gun propped on my range bag with a squeeze bag under the stock. It would not surprise me to shoot one MOA at 100 yards with a magnified optic and match grade ammo.

Here is how mine is configured:

- Aimpoint T-2 Mico optic.
- Surefire Mini Scout light with Larue quick detach mount.
- Sig Sauer collapsible stock.
- Advanced Armament TI-RANT 9S™ suppressor with fixed barrel spacer.
- Geissele Super Semi-Automatic Enhanced (SSA-E) trigger.

Ammo - Hornady 147 grain XTP hollow points. 1050 fps (subsonic). Loaded on my Dillon RL550B using assorted range brass.

What a fun project this has been! Here is some eye candy:

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Tons of fun! Very quiet, hearing safe. All you hear is the action working. Zero recoil and more accurate than I would have imagined. My wife can handle it just fine and would also be a great platform in which to introduce a child to the workings of an AR.

It has become our defacto home defense weapon. The one that sits by the bed at night. I like the Ti-Rant a lot too. It works well and it comes apart for cleaning. And if I ever want to put a suppressor on one of my pistols, I can.

Best of all I can crank out inexpensive accurate ammo on my Dillon. And of course I have several 9mm pistols that eat the same stuff.
 
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That looks like an awesome package. I have the same suppressor but nothing anywhere near as cool to attach it to ... just a P239. Now you got me thinking I need something else.
 
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