herkyguy
Member
- Joined
- Jul 31, 2009
- Messages
- 1,409
third time out with my MPX and comfortable enough with it to post some thoughts.
I've got the Gen II 13.5" barrel with a 2.5" flash suppressor and collapsing stock. Lucky it's not the earlier version with the tuning fork flash suppressor - that thing was absurdly annoying to listen to it ping.
I got a great deal on it through gunsamerica and paid $1500 plus shipping & FFL. It came with one mag, several rail attachments, a QD mount for the forend plus a sling.
First two times out shooting were indoors at 20 yards with zero failures, although there were a few pierced primers with factory ammo. The only thing I can see is a tiny burr on the firing pin, but internet searches reveal that I'm not the only one with the occasional pierced primer. Anyhow, zeroed about an inch low at 20 yards and had a blast with it those first few times.
Getting it home, I found it insanely easy to disassemble. If you can take down an AR, it's a few steps easier with the MPX. Forend slides right off.
Today I finally got it out to shoot some steel and a random toilet lid (which actually makes for a surprisingly durable target). I shot 100 rounds of Berry's 147 grain flat nose bullets sitting on top of 3.8 grains of 800X at a COL of 1.05" - I made the mistake of seating them a bit too deep. I had previously tested 5 rounds out of my XDs and they wouldn't cycle the slide. I was hoping they'd work with the MPX's longer barrel and medium burn rate and I'm happy to report that they were flawless. I forgot my chrono, but they were a light-recoiling and fairly accurate load, spitting the brass all within a foot of each other. No signs of pressure spikes. I also shot 50 rounds of Federal steel cased 115 grain, again with no failures but an impact about 4 inches higher than the 147s at 50 yards.
Pros:
Trigger is crisp. Minimal creep. One of the best features.
Minimal recoil, followups are fast.
Plenty accurate at 50 yards (3" group standing unsupported).
No failures yet at 250 rounds total through it.
Mags are solid, albeit pricey.
Reliable. Reliable. Reliable.
Cons:
Burr on firing pin - several pierced primers during first outing.
Little bit of wiggle between upper and lower.
Stock attaches to rail, had potential to wiggle loose.
Not the smoothest finish, but doesn't show any tool marks.
Windage is halfway to the right to cowitness with my Leupold Prismatic.
Overall, I dig it. I'm really interested in working up a hand load of 147 grainers with medium burn powders to see what I can get from the extra barrel length.
Lastly, Gen I and Gen II mags have different lips for feeding. I've played with two Gen I mags and they wouldn't feed one brand of ammo, but have worked with all the others. I'll stick with Gen II for most of my shooting.
I've got the Gen II 13.5" barrel with a 2.5" flash suppressor and collapsing stock. Lucky it's not the earlier version with the tuning fork flash suppressor - that thing was absurdly annoying to listen to it ping.
I got a great deal on it through gunsamerica and paid $1500 plus shipping & FFL. It came with one mag, several rail attachments, a QD mount for the forend plus a sling.
First two times out shooting were indoors at 20 yards with zero failures, although there were a few pierced primers with factory ammo. The only thing I can see is a tiny burr on the firing pin, but internet searches reveal that I'm not the only one with the occasional pierced primer. Anyhow, zeroed about an inch low at 20 yards and had a blast with it those first few times.
Getting it home, I found it insanely easy to disassemble. If you can take down an AR, it's a few steps easier with the MPX. Forend slides right off.
Today I finally got it out to shoot some steel and a random toilet lid (which actually makes for a surprisingly durable target). I shot 100 rounds of Berry's 147 grain flat nose bullets sitting on top of 3.8 grains of 800X at a COL of 1.05" - I made the mistake of seating them a bit too deep. I had previously tested 5 rounds out of my XDs and they wouldn't cycle the slide. I was hoping they'd work with the MPX's longer barrel and medium burn rate and I'm happy to report that they were flawless. I forgot my chrono, but they were a light-recoiling and fairly accurate load, spitting the brass all within a foot of each other. No signs of pressure spikes. I also shot 50 rounds of Federal steel cased 115 grain, again with no failures but an impact about 4 inches higher than the 147s at 50 yards.
Pros:
Trigger is crisp. Minimal creep. One of the best features.
Minimal recoil, followups are fast.
Plenty accurate at 50 yards (3" group standing unsupported).
No failures yet at 250 rounds total through it.
Mags are solid, albeit pricey.
Reliable. Reliable. Reliable.
Cons:
Burr on firing pin - several pierced primers during first outing.
Little bit of wiggle between upper and lower.
Stock attaches to rail, had potential to wiggle loose.
Not the smoothest finish, but doesn't show any tool marks.
Windage is halfway to the right to cowitness with my Leupold Prismatic.
Overall, I dig it. I'm really interested in working up a hand load of 147 grainers with medium burn powders to see what I can get from the extra barrel length.
Lastly, Gen I and Gen II mags have different lips for feeding. I've played with two Gen I mags and they wouldn't feed one brand of ammo, but have worked with all the others. I'll stick with Gen II for most of my shooting.