AR15.Com Archives
 My M400 SPR project.
C_Swimm  [Team Member]
1/9/2012 9:33:25 PM
Stopped by my LGS after work today and the gunsmith came in with my upper that I had him thread and install the free float handguard. When I got it home I installed the AAC blackout 51T muzzle brake. I had already installed the Giessele SSA trigger and KNS anti-walk pins. I also put a tac-latch on the charging handle. I installed a sling swivel stud to the Larue handguard so I could mount a Harris bi-pod without an adapter. Magpul PRS stock and XTM rail covers. SWFA SS 10x40 with Butler Creek flip up caps mounted in Burris XT rings. Secondary optic is a SIG Sauer micro red dot mounted in a Daniel Defense angle mount.

So I turned this:



Into this:









Grocerystore_ninja  [Member]
1/10/2012 12:47:24 AM
looks awsome
gunnut284  [Team Member]
1/10/2012 1:50:23 AM
How does it shoot?
C_Swimm  [Team Member]
1/10/2012 7:18:28 AM

Originally Posted By gunnut284:
How does it shoot?

I just finished getting it together right before posting this so I haven't had time to shoot it yet. If the weather holds I will be able to shoot it this weekend.

I took it out once to the range to test function mainly before sending it off to have the barrel threaded and the handguard put on. I only shot it at 25 meters to zero the scope and try for a few groups. My best 5 shot group was right at about a 1/4" with 4 holes touching and one slightly apart. The others were a bit closer to 1/2". This was with the not so great factory trigger and non free float handguard and using Federal green tip ammo. I am expecting at least 1 MOA out of it now with the SSA trigger and free float handguards with the same green tip ammo. If it can consistently get 1 MOA groups with the green tip I will start loading some match ammo for it.
GunCat  [Team Member]
1/10/2012 7:33:07 AM
I think I've seen that one before but not with all the parts back on it.

Looking good !
C_Swimm  [Team Member]
1/10/2012 9:15:10 AM
Thanks for the great work on the muzzle threading and handguard installation GunCat. Now I just hope it shoots as good as it looks.

Oh, and you were right about the sling swivel stud for the bi-pod. I used a nut from the back side and I was able to finagle it in there just enough to get the stud threaded in without having to remove the handguard. The hole in the handguard was too big to tap already anyway. I just used a little rubber washer between the stud and the rail surface to keep it from digging into the rail when I tightened it down. All tightened down there was still plenty of clearance so the shaft of the stud isn't contacting the barrel.