Modern Sporter builds Q&A

[hardyshooter]

I've had a similar issue with some lar15 mags that have a certain style of feed lips, my posts are on page 8 and 12.

Hmm interesting. Although I'm glad I'm not the only one this is still super annoying. Wondering what the remedy will be...

[no-one special]

Taking that pin out is a Beaach!
The small screw is locktited in.
You have to grip on the needle nose with the grip of Thor

After removing the pin , I got the U:L together, but it wasn’t easy.
You have to tip the upper on a coward angle to the lower( kinda like putting them together backwards.
The front will not pivot, once the back pin is out.
So now for the weird stuff.
Riding the CH will allow the trigger to work.
Slamming the CH will not engage the trigger.

Trigger works with a mag when you release the bolt via the bolt release, but not when you release it manually.. (dummy rnds)

Then it’s opposite on an empty mag.
Also the maritime bolt catch is very stiff.

I think the trigger is causing all these issues and is a no go.

Guys are just NEVER happy. You would complain if the rear pin that is supposed to be permanently installed rattled out and you compalin that it is difficult to remove. Ever think that was part of the design?
I have a Maritime bolt catch on mine and it works perfectly. No issue with install at all, but then again I just installed the parts without screwing around with the lower or upper. Any chance you buggered something up installing it?

[propliner]

Anyone having mag seating issues? Both metal mags and pmags won't work in either upper. Have one lower currently. It seems the upper sits rear ward on the lower, creating a lip inside the magwell that prevents the mags from seating. The upper and lower fit snug with very little movement so this seems strange..

Mine has a bit of overlap as well:



My Pmag won't drop free either but the magazine rivet is rubbing inside the magwell. I blame the liberals for this problem.

[greg olmstead]

Mine has a lip too. Elander mft magpul 20 and 30 acs all drop free and seat just fine. Little hard to seat loaded but that's due to ammo not the mag or mag catch

I cant post pictures so if some one would post it for me that would be great

[Brianma65]

Guys are just NEVER happy. You would complain if the rear pin that is supposed to be permanently installed rattled out and you compalin that it is difficult to remove. Ever think that was part of the design?
I have a Maritime bolt catch on mine and it works perfectly. No issue with install at all, but then again I just installed the parts without screwing around with the lower or upper. Any chance you buggered something up installing it?

WTF are you talking about.
I said the trigger wasn’t compatible and that I’d try a work around.
I never said the the rear pin should be removed, only that I removed it and it was difficult.

And ,as for the Bolt catch, I said it was trigger related.

[ThatM305Guy]

I had to file down the rivets in order to get mags in.

[propliner]

I had to file down the rivets in order to get mags in.

That's the plan. And don't worry Ralph, I won't file them down all the way.

[J.L.C.]

Anybody have any blems in the finish?

[propliner]

Anybody have any blems in the finish?

As with my old MH, a perfect finish.

[greg olmstead]

Anybody have any blems in the finish?

Only from the charging handle getting rack 1000+ times but it came flawless

This ain't an slr