Sunday, June 8, 2014

Magpul MBUS PRO Set

Just picked up my second set of MBUS PROs from PSA at a great price. The PROs are all steel construction and finished with a ferritic nitrocarburizing (or Melonite) process for extreme resistance to wear and corrosion. On the first set I received, both sights had the same semi-gloss finish, which seems to annoy some tactical ninjas on the interwebz, whereas, on my second set, the front sight had a mixed semi-gloss and matte finish. The rear sight had the uniform semi-gloss finish. I have no idea if this is a QC issue, but with a lifetime warranty, I'm not concerned at all. 

Packaging & presentation is excellent, as always, Magpul being the Apple/MAC of the firearms industry. 

[Click on image to enlarge]

Instructions are simple and concise. 

AS ALWAYS, before installing or working on your firearm, clear said firearm, because complacency leads to ER visits and you, obviously, don't need that. Don't become a statistic. 

The installation requires either a 1/8" hex key or a flat head screw driver. Whoever packaged my sights torqued the hell out of em, though it was probably the loctite that Magpul products come standard with. Either way, I had to muscle the screws fixed onto the clear packaging rails to get the sights off. Again, not like the first set I received. Once off, I installed them onto my firearm. As noted in the instructions, "do not over-tighten."

The MBUS PROs are deployed by moving them into position with your fingers. One does not have to depress any buttons for this action to be accomplished. Once up, they are solid. All four sights (that I own) have zero wiggle. If yours has wiggle, something is wrong. Obviously if you manhandle them they will wiggle, so don't overthink it. 

To disengage and retract the sights, simply push them down in the reverse direction. Some force may be required, but nothing excessive. 

For zeroing, note that no tools are required to adjust your rear sight or the front sight. The rear sight is self explanatory, just rotate the drum to adjust POI. If you need to move your POI to the right, rotate the drum as indicated (arrow indicates the right), if to the left, rotate the opposite direction.

The front sight is the same. To adjust your POI up, rotate based on the direction of the arrow under the 'UP' (pointing from the 'U' to the 'P') inscribed on the back of the front sight. If the muzzle of the firearm is pointing away from you, it'll be to your right, counter-clockwise. If you need to lower your POI, rotate the drum the opposite direction (clockwise).

On my first set I cowitnessed with my Aimpoint PRO and set my sights based on the red dot. When I hit the range to confirm my zero, I was basically dead on for my 36yd zero and did a slight adjustment. For my second setup, I won't have that luxury as I will have to remove my Burris MTAC and then zero. Below is the rifle. I will be removing the YHM sights (which I like a lot) and install the new set of MBUS PROs. Why, well, because my YHM sights are within a millimetre of touching the MTAC and I would like some additional clearance. The following pictures explain why making the transition to the MBUS PROs an obvious choice.

Final notes. None at this point, I just need to go zero this rifle. If I have an issue, which is doubtful, I'll post back, otherwise this verbiage will remain.

Ah, well, I guess I could give some details on the rifle. The lower receiver is a PSA lower with an ALG trigger and the upper is a right-sided LAR GRIZZLY OPS-4 forged upper. The barrel is a YHM 16" with a PWS FSC556 muzzle break. Looks like prices on the LAR GRIZZLY OPS-4 have gone up and you can no longer order direct. The BCG on mine was produced by Young Mfg for LAR GRIZZLY, an excellent BCG.  EDIT: The good folks at LAR GRIZZLY have started a new brand called Crosshill Technologies and I highly recommend checking out their products and supporting their line. 

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