I decided to upgrade my standard plastic Hand Guards on my PSA M4 style upper..

 

Troy is running 50% off the Troy MRF-MX 10" Quad.. its $105 with FREE SHIPPING..

 

I had PSA install a low-pro gasblock vs. the standard FSB for just this purpose when I ordered the upper last month..

 

My YHM 5M2 Brake is pinned so.. I needed the ease of the Troy MRF type rail.

 

Heres a pic of the PSA upper as I got it..

 

 

Heres a pic of the low-pro gas block they had installed for me (for free)

 

 

Heres a pic with the gas block loosened up an me beating on the END CAP and moving the gasblock just enough to get the gas tube off and the END CAP cut... and yes I did nick the gas block a hair.. no biggie will be under the new Troy MRF 10" Quad Rail..

 

 

Note: you DO have to CUT the Delta Ring and Spring Pack off with a Dremel also for this to install. the nice part is you DO NOT need to remove the barrel nut or barrel.. Use care not to hit the upper with the cut-off wheel when cutting the Delta Ring or the END CAP..

 

Heres a pic of the gas tube and gas block back on whilst I wait for the BROWN TRUCK today..

 

 

I'll post more pics later when I get home and install..

Ok.. here is the bottom of the rail after install..

 

the 4 outer screws go in loose.. then slide the bottom rail into the notches in the upper rail.. go slow tightening each screw alternating between them for evenness.. make sure your Upper is bare.. so you can lay the whole thing FLAT and align it easier.. (or you something that will span from the rail to the upper rail.. maybe a carry handle would work)..

 

 

Here is a shot of the TOP where it meets the Upper.. almost 0 gap..

 

 

Longview..

 

 

Right Side..

 

 

Left Side..

 

 

and the overall pic.. with camera..

 

 

I gained a solid 3" on my sight radius with my MBUS installing this..

 

This part of the install was like 10-15 minutes of even tightening.. common sense and read the directions..

gun looks good... what optics?

I can't remember - where did you have that front sight hooked up before? Right on the front of the upper's rail?

Thanks.. thing is ROCK solid..

 

Was on the front of the 7" Quad I used to have.. sight radius was like 11 3/4"..

 

now its at 14 1/2" with the MBUS.

 

Thats a Primary Arms M3 (clone) with 3MOA only red dot..